Feb 10, 2022 · Bad Compressor Capacitor. If your ac compressor won’t turn on but your fan is running, this could be a sign that the capacitor that powers your compressor is not working. Newer outside condenser units come with dual capacitors, one part that powers the compressor and the other one that powers the fan motor. With time, any of these two parts ... The Short Answer Is: A homeowner's heat pump compressor may not turn on due to various reasons, including a malfunctioning thermostat, a tripped circuit breaker or fuse, a faulty capacitor, or issues with the contactor. Problems with the start relay, temperature sensors, or the compressor itself can also contribute to the failure. Once the leak has been found, this must be closed again by replacing the respective component. 4. Dirty evaporator. Dirty evaporator can also be the reason for AC problems on your Ford F-150. Cabin air filter captures most of the dirt or other airborne particles, but some escape and fall on to the evaporator.Mar 9, 2014 · 2-5 Ohms resistance across compressor coil. Check for power at Compressor electrical connection w/key on, AC light illuminated. Try to spin fan clutch while cool - if it spins, you have a problem. Replace. Consider cleaning all AC electrical connections in the engine bay AND in the CABIN. 8 Common Causes Of “Air Conditioner Not Blowing Cold Air” We have broken down each cause into 3 sections to help you out: What part of AC might be causing the “not blowing …On top there should be a connector to the low pressure switch. Un-plug the connector and jumper the 2 terminals on the wire harness then start up and turn on the system. If the compressor clutch engages then you most likely have a low pressure issue. If you come to a fork in the road take it. 1999 Wrangler Chili Pepper Red.Ac compressor wont kick on. Discussion in '1st Gen. Tacomas (1995-2004)' started by SilverlineShockService, Feb 18, 2016. Post Reply. Feb 18, 2016 at 8:32 AM #1 #1. ... The only one you won't be able to easily see is the in dash components. If the system has to be opened to replace parts, have a pro do it. While the work may (or may …The procedure is simple, start the engine, activate the AC system, and remove the AC clutch connector. Measure the voltage coming to the connector with a multimeter, and if everything is activated properly, you should see 12 to 14 volts coming to this wire. If there is a ground wire, you should also check the ground.Sep 16, 2005. Fort Lauderdale, Florida. went to try & fix my a/c today. its fully charged. but the compressor clutch wont kick on unless i jumped the relay. Had the A/c machine hooked up to it and also noticed that my LOW side pressure is going negative ( into vacumm ) ...i just replaced the expansion valve. I sucked the A/C out for 30mins with ...Check to see if your circuit breaker is tripped to the OFF position. Make sure the outdoor disconnect switch on your outdoor unit is on the ON position (this switch is usually a small metal gray box mounted on a wall near the outdoor unit). When your thermostat is activated, the blower motor in your furnace or air handler should run (make sure ...When to call a pro. A furnace and/or AC that won't turn on usually has a power supply issue or a tripped limit switch. Limit or safety switches turn off the system when a malfunction occurs. Some of these safety switches must be manually reset before the system will turn on again. However, the issue is sometimes simply a matter of power …Clutch disc moves but won’t engage. The spacing between the compressor clutch disc and the pulley must be exact. This is referred to as the air gap. If the gap is too wide, the electromagnet won’t be able to pull the clutch disc in with enough force to mate with the pulley. The only way to diagnose compressor clutch air gap is with a feeler ...May 14, 2008 · You use a 'jumper' wire. Unplug the switch from the connector. Insert the jumper wire. The compressor should come on. Use your freon pressure gauge to judge the freon level in the system. If the gauge indicates that the freon charge is adequate, then you have a bad switch. (The AC must be turned on in the cab....I am just covering all the bases.) The Short Answer Is: A homeowner's heat pump compressor may not turn on due to various reasons, including a malfunctioning thermostat, a tripped circuit breaker or fuse, a faulty capacitor, or issues with the contactor. Problems with the start relay, temperature sensors, or the compressor itself can also contribute to the failure. Check for Power. The first and most obvious thing to do when your compressor won’t start is to make sure that the unit is receiving power. It is always possible that a fuse has been blown or that a breaker has been tripped. If such issues occur regularly, you should have an electrician take a look. It isn’t normal for the fuses and …The Shut-Off or Emergency Switch Is Off. Another switch that could cause your outside AC unit not to turn on is the emergency or shut-off switch next to the unit. This switch allows the cooling system to be turned off from the exterior. Check to see if this switch is in the “on” position. You can also press the reset button on the outside ...I have a Honeywell thermostat which controls my Haier hr48d1var outdoor heat pump/act unit. The cool indicator is continuously flashing and the ac won't kick on. I tried taking the batteries out until … read moreThings You Should Know. If the screen is dark or blank, replace the batteries and check the circuit breakers. Ensure the furnace and air conditioner are turned on, and the thermostat is wired correctly to your HVAC system. Resetting your thermostat can fix programming issues and keep it in sync with your HVAC system.Mar 9, 2014 · 2-5 Ohms resistance across compressor coil. Check for power at Compressor electrical connection w/key on, AC light illuminated. Try to spin fan clutch while cool - if it spins, you have a problem. Replace. Consider cleaning all AC electrical connections in the engine bay AND in the CABIN. Determine if the anticipator is set correctly. If you have a mechanical thermostat, check for a little metal tab that is mounted to a round dial on the inside. First, try pushing the tab lightly in either direction to see if that solves the issue. If not, you may need to set it to the furnace’s ampere setting.The AC unit turns on but doesn’t cool: If your unit turns on but doesn’t cool, check your thermostat to be sure that it is set at the correct temperature. You should then check the condenser and evaporator for dirt and clogging. If too much dirt builds up, your unit may not turn on at all. The condenser unit returns on and off repeatedly ...231 posts · Joined 2009. #10 · Mar 14, 2018. Do not jump a wire to the clutch. If your refrigerant is too low the system won't allow it to come on as a safety precaution. The refrigerant is what lubricates the compressor, there is a switch that senses pressure for that reason. If you run the compressor without that lubrication you will kill it.Jul 27, 2022 · This article covers the 10 most common reasons the blower fan does not turn on! A blower motor may be installed in a forced air gas or oil furnace, air handler, or packaged unit. There are multiple reasons why the motor won't start and these are based on the type of unit, controls, and the blower motor type.Problem # 1: Capacitor When an HVAC unit is equipped with a PSC (Permanent Split ... I checked and the compressor is not engaging. I replaced the clutch relay under the hood and the AC fuse next to it, as well as the low pressure switch located on top of the compressor. I jumped the relay with a paperclip, and the compressor came on and was blowing cold air. I was able to add freon and oil. Once I removed the jumper and put …jump off the low pressure switch and see if the compressor kicks on or jump it off in the relay box. 98 zj,4.0, select trac, 2"bb, 31's, safari rack, crager soft 8s, silverstar headlights, hypertech programmer, and k and n air filter. Like. 8. 84961 Discussion starter.OK, I'm having some AC issues, hopefully I can get some feedback. Starting mid-week last week my AC unit outside won't kick on at night. After the suns up, it'll run fine all day. Luckily, it's been in the low-mid 70s at night this week, but during the day it's been horrid. The indoor blower will run all night long thinking it's doing something, so my …As of September 2014, the fastest ever recorded speed of a kicked soccer ball was 131 miles per hour. The speed came from a free kick made by Ronnie Heberson of Lisbon’s Club Sport...Oct 17, 2014 ... Check the power supply. When your AC compressor won't turn on, check to see that it's receiving power. This may seem like a no-brainer, but one ...8 Common Causes Of “Air Conditioner Not Blowing Cold Air” We have broken down each cause into 3 sections to help you out: What part of AC might be causing the “not blowing cold air” problem.; How to check which part of AC caused the indoor unit to not blow cold air.; How to fix the problem (either DIY or if you need to call an HVAC professional).; In …01 - Incoming Power Problem. Confirm the air conditioner is plugged in and there is power at the wall receptacle. If it has a 120 volt outlet, you can plug another small appliance into the recepticle to confirm there is power. For 220 volt units you will need to use a multimeter. If there is no power, confirm the circuit breaker has not tripped.Solution: Re-light the Pilot Light. Turn the gas valve to PILOT position. Press and hold the BYPASS button for several seconds to let gas into the pilot. While holding the BYPASS button, use a ...On top there should be a connector to the low pressure switch. Un-plug the connector and jumper the 2 terminals on the wire harness then start up and turn on the system. If the compressor clutch engages then you most likely have a low pressure issue. If you come to a fork in the road take it. 1999 Wrangler Chili Pepper Red.Why Won't My Air Conditioner Turn Off? · 1. Incorrect Thermostat Settings · 2. Bad Thermostat · 3. Electrical Problems · 4. Stuck Fan Limit Switch &...Air conditioner fans not working can be a sign of a frozen evaporator coil. The evaporator coil sits inside your home within the air handler unit (furnace or fan coil), pulling heat and humidity from indoor air as it passes through. The evaporator coil can freeze up as a result of indoor blower fan malfunction, low refrigerant charge, low ...As of September 2014, the fastest ever recorded speed of a kicked soccer ball was 131 miles per hour. The speed came from a free kick made by Ronnie Heberson of Lisbon’s Club Sport...When to call a pro. A furnace and/or AC that won't turn on usually has a power supply issue or a tripped limit switch. Limit or safety switches turn off the system when a malfunction occurs. Some of these safety switches must be manually reset before the system will turn on again. However, the issue is sometimes simply a matter of power …In today’s digital age, having a strong online presence is crucial for businesses, especially for ace online stores. With the increasing popularity of e-commerce, it’s important to...When it comes to installing a new AC unit, many homeowners focus solely on the upfront cost of the equipment itself. However, there are several hidden costs associated with a new A...Your metabolism is a system of chemical reactions in your body that convert food into energy. This created energy is used to support almost all of your body’s functions, from movin...Look at the diagram below, the A/C Pressure switch connector needs to be tested. Finally, there is the A/C Thermostat switch just next to the blower... if that device is what actually engages when you turn your A/C on, if this doesn't engage the compressor won't receive the signal for power output. sean1121 said:Condenser works. A coil freezes. Blower won't. Trane XE 78. Condenser works. A coil freezes. Blower won't kick on. Manual blower (Fan on) works and kicks the blower on ok. As soon as A … read more.If the air conditioner unit is blowing air inside but the outside unit is not running, there are a few possible causes. The most common cause is that the breaker has tripped or blown. Another possibility is that the condenser coils are dirty and need to be cleaned. Finally, it could be that the Freon levels are low and need to be refilled.If the air conditioner unit is blowing air inside but the outside unit is not running, there are a few possible causes. The most common cause is that the breaker has tripped or blown. Another possibility is that the condenser coils are dirty and need to be cleaned. Finally, it could be that the Freon levels are low and need to be refilled.Troubleshoot Your Aircon: 8 Common Reasons Why Your AC Won't Turn On · Potential Cause 1: Power Problems · Potential Cause 2: Faulty Control Board · Potent...2. If your thermostat requires you to remove it from the wall to replace the batteries, with a wall plate left affixed to the wall, then it sounds like you didn't properly reattach it to the wall plate. There will be electrical contacts between the two halves, often long pins, that need to properly align.If your AC is in a window that gets direct sunlight in the heat of the day, it will have to work harder to cool your space. If you have a choice, move it to a shadier spot. If you don’t, keep ...AC Hotel by Marriott Milan S..." Convention Bureau Italia on Instagram: "Monday: let's kick off the week by introducing one of our partners! AC Hotel by Marriott Milan Sesto - An …If you're visiting Palma, Mallorca, you'll want to check out this AC Hotel property for its prime location, good service, and great value. We may be compensated when you click on p...1. Temperature Control or Thermostat Problem. If your air conditioner coil is upwards, then there may be a problem with temperature control or thermostat. This part monitors the air temperature of the room. If necessary, indicates the compressor to be started to start the cooling. There is a most common reason for outside ac unit not …2010 A/C Compressor won't kick on. So first the background.. We bought our 2010 murano SL in 2013 with 38k miles, it now has 73k. We haven't had a single problem with it until now. On a recent road trip, in the blazing Texas heat, our a/c started blowing hot. So a few miles down the road we stop and I pop the hood, and see the …Compressor Malfunction. One of the most common causes of an AC that won’t turn on is a faulty compressor. The compressor is the heart of the air conditioner, as it is responsible for circulating the cooling refrigerant throughout the system. If the compressor is not functioning properly, it can cause the AC not to turn on or only to blow …The Shut-Off or Emergency Switch Is Off. Another switch that could cause your outside AC unit not to turn on is the emergency or shut-off switch next to the unit. This switch allows the cooling system to be turned off from the exterior. Check to see if this switch is in the “on” position. You can also press the reset button on the outside ...Ac compressor won't kick on. ... refilled n still blew warm now it still blows warm .compresor still wont kick on and horn still doesnt work after new relays for both as well. any advice .thanks . 96 ECLB 3:55 sb3250 100 plate sdx dvs guages bhaf 4-5-7inch custom mitre.218k ...OK, I'm having some AC issues, hopefully I can get some feedback. Starting mid-week last week my AC unit outside won't kick on at night. After the suns up, it'll run fine all day. Luckily, it's been in the low-mid 70s at night this week, but during the day it's been horrid. The indoor blower will run all night long thinking it's doing something, so my …Oct 20, 2019 · Low stays at up around 80. Seems like some is getting in as after I removed the gauges and press the schrader on the low port some refrigerant comes out. And when closing the low side of the gauges it drops the pressure down to about 20 psi. I tried jumping the compressor for a few seconds and it kicks on but the pressures don't change. Remove your thermostat from the wall, and open the battery holder on the side of your thermostat. Remove the old batteries and clean the inside of the holder. Insert the fresh set of batteries and close the battery holder. Remount the Honeywell thermostat on the wall again. Ensure that it clicks into position.Sep 1, 2022 · Here are 10 common reasons why the A/C compressor won't turn on. Refrigerant levels. Electrical problems. AC compressor clutch. Evaporator temperature sensor. Pressure sensor. Engine faults. Bad A/C button or control module/head unit. A/C Compressor clutch relay. Codesignal is an online platform that helps employers assess the coding skills of potential candidates. It is a great way to quickly and accurately evaluate a candidate’s coding ab...First things first—you should always check the batteries in your thermostat if it’s not turning on your AC. Pull off your thermostat from the wall and check if it has a battery compartment behind it. Change out the batteries, reinstall the thermostat, and check if your AC works. Not all thermostats have batteries—but it’s a good thing ...The Short Answer Is: A homeowner's heat pump compressor may not turn on due to various reasons, including a malfunctioning thermostat, a tripped circuit breaker or fuse, a faulty capacitor, or issues with the contactor. Problems with the start relay, temperature sensors, or the compressor itself can also contribute to the failure.After inspecting the belt, there can only be two things left that could be happening: 1. The clutch is not getting a signal to turn on. This indicates some form of wiring problem. -or-. 2. The AC compressor is getting a command to turn on but is no longer able to, which would indicate that it needs replacing. 2.Apr 1, 2019 ... An AC compressor that won't turn on. · A compressor that shakes or stutters when it's turned on, otherwise known as hard starting. · An air&nb...I have a Honeywell thermostat which controls my Haier hr48d1var outdoor heat pump/act unit. The cool indicator is continuously flashing and the ac won't kick on. I tried taking the batteries out until … read more Let’s take some time and explain all 8 reasons why your car’s air conditioning compressor won’t turn on. 1. Low Refrigerant in the AC System. This is by far the most common issue as to why your AC is not working. Low amounts of AC freon refrigerant will be detected by the AC pressure sensor switch, causing the AC not to kick in. 464 posts · Joined 2012. #21 · May 20, 2013. You probably need to pull a vacuum on it to get enough refrigerant in to close the low pressure cutoff switch, so the compressor will take the charge. The vacuum will also boil off any moisture present in the system, so it doesn't sludge and form acids in the system.2010 A/C Compressor won't kick on. So first the background.. We bought our 2010 murano SL in 2013 with 38k miles, it now has 73k. We haven't had a single problem with it until now. On a recent road trip, in the blazing Texas heat, our a/c started blowing hot. So a few miles down the road we stop and I pop the hood, and see the …There is a pressure switch in the system that prevents the compressor from operating when the freon pressure is too low. Just add some freon and once the pressure increases, the AC clutch will engage. 2002 Park Avenue The 2 year old AC compressor will not kick on. FULL of freon, Temp controls work fine and the pressure switch was replaced.airheatman. HVAC Technician. 6 years college. 19,130 satisfied customers. My Rheem Classic Quiet 80 started making a loud noise this. My Rheem Classic Quiet 80 started making a loud noise this morning when the AC was running and now when it kicks out it runs for awhile and the airflow gets weaker and then it just makes a loud buzzin….A/C compressor wont kick on. 2004 X 5.4. Turn **** to A/C, MAX A/C, or defrost and nothing. I checked the 10 amp fuse in the panel. it's fine. I can hear the relays working when I turn to defrost or to a/c. Last summer I added some 134A to it to top it off. The defrost worked fine all winter long.Look into your air filter’s housing and check the markings on your filter. If your furnace blower won’t turn on, check to confirm the arrows on the air filter are pointing in the correct direction. When the arrows are pointing in the wrong direction, change the orientation of the filter. Next, check the vents around the blower.The air conditioning (A/C) compressor clutch will not engage under the following conditions: • The A/C high side line pressure is over 2957 kPa (429 psi). • The A/C low side line pressure is under 138-172 kPa (20-25 psi). • Throttle angle is at 100 percent. • Engine speed is more than 5500 RPM.July 5, 2023 Cooling. If your air conditioner is not working, check the fan on the outside unit. If it’s buzzing, but the fan is not spinning, you may have one of two issues. First, If the fan on your outside unit is not spinning, do a visual inspection to ensure it is not jammed. If there is an exceptional amount of dirt or debris around the ...This question is about the ACE Elite™ Visa® Prepaid Debit Card (Pay-As-You-Go) @kendallmorris • 04/13/18 This answer was first published on 04/13/18. For the most current informati...Dec 23, 2021 · Check the Power Supply. Sometimes, a power switch can be accidentally turned off. Look for your home's central air conditioner power supply and make sure all the switches are turned on. Check to ensure that the power at the unit itself is on. Look for a switch that should be mounted near the equipment. Check the circuit breakers (or fuses, if ... 8 Common Causes Of “Air Conditioner Not Blowing Cold Air” We have broken down each cause into 3 sections to help you out: What part of AC might be causing the “not blowing …1. Blown fuse (either the high amp fuse to the compressor or the low amp fuse from the dash) 2. Low or High freon pressure (too high or too low of a pressure reading will trip an internal switch not allowing the compressor to engage, thus saving the compressor from damage) 3.Dec 23, 2021 · Check the Power Supply. Sometimes, a power switch can be accidentally turned off. Look for your home's central air conditioner power supply and make sure all the switches are turned on. Check to ensure that the power at the unit itself is on. Look for a switch that should be mounted near the equipment. Check the circuit breakers (or fuses, if ... The Short Answer Is: A homeowner's heat pump compressor may not turn on due to various reasons, including a malfunctioning thermostat, a tripped circuit breaker or fuse, a faulty capacitor, or issues with the contactor. Problems with the start relay, temperature sensors, or the compressor itself can also contribute to the failure. The Shut-Off or Emergency Switch Is Off. Another switch that could cause your outside AC unit not to turn on is the emergency or shut-off switch next to the unit. This switch allows the cooling system to be turned off from the exterior. Check to see if this switch is in the “on” position. You can also press the reset button on the outside ...Jun 24, 2015 ... If your air conditioner will turn on, and your thermostat is set properly, but your system is not cooling you may have a dirty or blocked air ...Jul 22, 2020 ... If the fan won't start even with a kick-start, and you hear the compressor running, you probably have a bad fan motor. This is more common ...Problem # 1: Capacitor. When an HVAC unit is equipped with a PSC (Permanent Split Capacitor) blower fan, a capacitor is required to both start and run the motor. The capacitor's job is to store and then discharge electrical energy in order to create an artificial phase of electricity for the blower motor power supply. Testing the capacitor ...ac compressor won't kick on. 2007 5.9 here's the story. Replaced the motor and never filled the AC with freon because it was winter time. Now it's summer we fill it up and the compressor seizes. Replaced the pressure switch and the AC compressor and liquid line. Had a code for pressure switch A voltage high.An extra-point kick in the National Football League is a 20-yard kick. Extra points always follow a touchdown, allowing teams the opportunity to score an additional point after ear...
When to call a pro. A furnace and/or AC that won't turn on usually has a power supply issue or a tripped limit switch. Limit or safety switches turn off the system when a malfunction occurs. Some of these safety switches must be manually reset before the system will turn on again. However, the issue is sometimes simply a matter of power …. Vertical gardening
Check the Power Supply. Sometimes, a power switch can be accidentally turned off. Look for your home's central air conditioner power supply and make sure all …May 2, 2016 · 2004 - 2008 Ford F150 - A/C compressor not kicking in - Hello, here I am again, seems like owning a Ford truck guarantees you a lifetime of issues, anyways, This time I'm having problems with my AC. It's fully charged but compressor doesn't kick in. Bypassed relay and it works fine. Replaced pressure sensor and... Check for Power. The first and most obvious thing to do when your compressor won’t start is to make sure that the unit is receiving power. It is always possible that a fuse has been blown or that a breaker has been tripped. If such issues occur regularly, you should have an electrician take a look. It isn’t normal for the fuses and …Water filled up the AC drain pan, and the Float Safety Switch shut the AC off. If your AC has a float safety switch, it could be the reason your AC isn't turning on. The float safety switch turns off your AC when it detects water pooling at its base. If the float switch is faulty, it may falsely prevent your AC from turning on.Feb 10, 2022 · Bad Compressor Capacitor. If your ac compressor won’t turn on but your fan is running, this could be a sign that the capacitor that powers your compressor is not working. Newer outside condenser units come with dual capacitors, one part that powers the compressor and the other one that powers the fan motor. With time, any of these two parts ... Apr 29, 2020 ... Cold weather, snow, and ice all threaten your condenser during the winter months, creating the potential for serious issues. If the simple ...When you’re in the market for an air conditioning unit (AC) you should be aware that all HVAC brands are not equal in quality and reliability. This guide highlights four AC brands ...Your Mercedes vehicle will flash a host of service lights to inform you when something might be damaged inside the car. If the air conditioner unit is not running normally or is on...2.8l. Transmission. Automatic. Mar 16, 2012. #3. You can trace it with a test light with the engine running turn the a/c on and see if your getting power to the clutch, If so the clutch is bad. then work your way back to the computer. To check if the system is dead carefully depress one of the schrader valves lightly to see if refrigerant comes ...Oct 20, 2019 · Low stays at up around 80. Seems like some is getting in as after I removed the gauges and press the schrader on the low port some refrigerant comes out. And when closing the low side of the gauges it drops the pressure down to about 20 psi. I tried jumping the compressor for a few seconds and it kicks on but the pressures don't change. Check the filter for blockages and replace it if necessary. 5. Malfunctioning Pilot Light. The pilot light is responsible for lighting the furnace’s burners in older gas water heaters. If the pilot light goes out, the furnace won’t turn on. In this case, you can relight the pilot yourself.09 - Central Air Conditioner Run Capacitor. The run capacitor for the condenser fan motor and compressor might be at fault. If the run capacitor is defective, the fan motor might be noisy, overheat, or not run at all. To determine if the run capacitor has failed, inspect the capacitor. If the run capacitor is bulging or leaking, replace it.Solution: Re-light the Pilot Light. Turn the gas valve to PILOT position. Press and hold the BYPASS button for several seconds to let gas into the pilot. While holding the BYPASS button, use a ...May 26, 2009 · 46 posts · Joined 2008. #16 · Jul 16, 2009. Yes that is the correct switch. If you are low of freon it will still cool when you jump the switch, but the switch keeps it from coming on if it is low because it will burn up the compressor with no freon circulating. On top of the dryer is a switch that turns your compressor off when the pressure in the evaporator drops doen to about 20psi or so. When you short the contact together on the connector, the compressor should come on. Pull vacuum and ensure it holds. Make sure both the high and low ports are open to the vacuum pump.This is a bad temperature sensor in the unit; replace the fan limit controller. Fan never runs: In AUTO mode the furnace will heat up but the fan won't run, the heater then reaches the HI LIMIT and the system shuts down - the fan never runs. For this case or if your blower fan or furnace fan won't start at all, see.The process is simple if you know what you are up to. Start by disconnecting the AC unit from the electrical source, remove the panel to access the capacitor, check …Ace Hotel is marking down its rooms brand-wide between May 16-31, for stays June 1-September 10, 2023. Opened in May 2022, the Ace Hotel Sydney is one of the newest properties in t...Dirty Filter. When dealing with your AC compressor not turning on, check the air filters first. If your unit’s filters are clogged, your indoor AC unit can’t get the airflow it needs to transfer the coldness away from the evaporator coil. As a result, the evaporator coil can become frozen and pressure in the refrigerant can drop to an ....