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air conditioning

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P2517 OBD-II Trouble Code: A/C Refrigerant Press Sensor B Circuit Low
P2517 code means the A/C refrigerant pressure sensor is out of the normal refrigerant level range, a faulty switch, wiring, or connectors.
How to Troubleshoot a Surge Caused by Car Air Conditioning
Car air conditioning can cause a surge in the car engine if belt have slipped, the throttle body is faulty, or the idle control valve needs replacing.
How to Replace an Air Conditioning Expansion Valve (Orifice Tube)
Car air conditioning systems need the expansion valve, or orifice tube, replaced if the AC is blowing warm air or the AC system is broken.
P2613 OBD-II Trouble Code: A/C Refrigerant Distribution Valve Control Circuit High
P2613 means a problem with the A/C refrigerant distribution valve control circuit which causes the air conditioning to not work properly.
P0539 OBD-II Trouble Code: A/C Evaporator Temperature Sensor Circuit Intermittent
P0539 means the A/C evaporator temperature sensor has a too high/low voltage signal, usually caused by a faulty evaporator temperature sensor.
How to Replace an AC Accumulator
The accumulator in the air conditioning system is faulty if there is rattling inside of it or there is a moldy smell emitting from the AC system.
How to Diagnose a Broken Car Heater
A working car heater will keep you warm and defrost your car. A failing radiator, thermostat, or heater core can cause your heating system to fail.
How to Diagnose an Inoperative Air Conditioning System Faster and Easier
Automotive technicians diagnose an inoperative air conditioning system with a digital scanner, physical inspection, and under the hood examination.
Should I Get an EPA Technician Certification?
Automotive technician jobs often require EPA technician certification for mechanics, so you can make repairs on automotive air conditioning systems.
How to Get an EPA License as an Automotive Technician
Automotive technician jobs require an EPA certification to learn how about the environment while repairing automotive air conditioning systems.
How to Replace an AC Clutch Cycling Switch
An AC clutch cycling switch meters low side AC pressure. This switch helps the AC system maintain proper cabin and evaporator temperatures.
How to Replace an Evaporator Temperature Sensor (Switch)
The air conditioning system has an evaporator temperature sensor that fails when there is no cold air or the air conditioning is inconsistent.
How Does a Car Air Conditioning System Work?
Auto air conditioners serve well on hot summer days to make driving more pleasant by cooling the air and removing excess moisture in the car.
How to Get an EPA Technician Certification
The EPA (Environmental Protection Agency) technician certification program educates people who wish to repair automotive air conditioning systems.
How to Replace an AC Pressure Switch
The AC pressure switch protects the AC system from pressure that's too high or low. Common signs of failure include a bad compressor or lack of AC.
How to Clean Evaporator Drain Tubes
The air conditioning system on a car has evaporator drain tubes than need cleaning if there is dirty air in the car or it is not blowing consistently.
How to Replace a Car Air Conditioning (AC) Compressor
If the AC compressor fails, it can cause the air conditioning system not to work. This article covers how to locate, remove, and install a compressor.
How to Replace a Heater Blower Motor Switch or Relay
The motor switch on your heater and air conditioning goes bad when the switch gets stuck in certain positions or will not budge at all.
How to Replace an Air Conditioning Belt
Replacing an AC belt can be challenging, as you have to locate specific parts in the car in order to do so, and use proper tools to complete the task.
How to Replace a Car Air Conditioning (AC) Low Pressure Hose
Car air conditioning (AC) low pressure hoses carry refrigerant back into the compressor to keep providing cold air in a closed loop system.

Related questions

Question
My air conditioner is not working , but my heater is , what can be the problem
Hello. Thank you for writing in. The A/C system and the heating system have relatively little to do with each other. They share a blower motor, and climate control switches. With the heater working we can assume that these components...
Question
Aircon blowing out white stuff.
There shouldn't be any dangerous materials in the AC system. But it is possible that you have a buildup of dust or even mold. Your car has a cabin air filter that is supposed to keep anything out of the...
Question
Trying to figure out what's wrong with my ac
Just ran into this same situation on another vehicle and the compressor pulley and clutch disc needed to be replaced. The bearings in the pulley goes bad and will intermittently lock up and will make a scream noise when pulley...
Question
I have a 2004 Pontiac Montana and the air compressor does not work anymore. Could it be a simple fuse replacement?
Hi there. Check the fuses for any blown fuses. If the fuses are good and working, then check the clutch wire to the compressor and see if there is power with the air conditioning switch on high and fan on...
Question
There was a temperature change in my car.
Hi there. The thermostat on the air conditioning is not functioning correctly. I recommend replacing the thermostat temperature scanner for your air conditioning system. The thermostat will determine when the blend doors are to activate and when the air conditioning...
Question
Engine overheating chime will not turn off even when the engine has been off overnight. whats the fix?
Hi there. Check the coolant temperature sensor and see if the sensor has a harness plugged in on it. Look at the harness and make sure that the harness is not melted. Check for a voltage reference on the harness...
Question
What if I don't have the convenience option?
Hi there. You can get a remote that has the options to turn on the heater, seat heater, air conditioning, or defroster. If your remote has the functions but they do not work, then you may have to reprogram the...
Question
Reduced engine power, tire pressure symbol, and AC noises
Hello. From what you describe it would appear that your vehicle may be experiencing more than one issue. The exclamation mark and tire symbol come on when the vehicle's tire pressure monitoring system is set off. This occurs when the...
Question
Air conditioning system stopped cooling and blows hot air even while adding refrigerant.
Hi there. Check the air conditioning system for any signs of leaks. Check all of the hoses and see if any of them have a hole rubbed in them. Check the compressor for any signs of leaks around the clutch...
Question
Tapping Noise when idling?
Hi there. Check the engine mounts and see if they are loose, worn, or broken. Engine mounts that are not secure to the vehicle properly will make the vehicle vibrate when at a stop and in drive with the brakes...
Question
How to remove the front control module on a 2013 MKS
Hi there. The front control module is held in with a console cover that is snapped in place. Very careful, remove the center console with a small pick or screwdriver. The cover will pop out of the dash. Then the...
Question
My air conditioner only blows sometimes. The refrigerant is good. It was checked.
Hi there. The symptoms reveal that the blower motor and the rheostat switch could be causing the air to blow sometimes. First check the rheostat switch to the blower motor and see if the motor functions on all the settings....
Question
Misfire after installing AC
Hello. In most cases the AC system should not affect the operation of the engine. If the issues only began after the AC was installed, it may be possible that the issue developed while the AC was being worked on....
Question
I have a 2009 Nissan Maxima and the air conditioning is not blowing cold air at all. What could be the problem?
Hi there. If the air conditioning is not blowing cold air, then either the condenser fan is not coming on or the system is low on refrigerant. Check the system and see if there is a refrigerant charge. If there...
Question
A/C compressor clutch does not engage, cooling fan does not turn on, condenser fan does not turn on, and ceiling light does not turn on.
Hi there. The air conditioning clutch could be not working for the refrigerant could be low or the clutch could be burned up. Check the air conditioning compressor clutch wiring for a voltage with the a/c switch on high and...
Question
Frozen ac pump
If the a/c compressor pulley does not turn and is seized you will need to see if the inside compressor clutch shaft is seized or the compressor pulley bearing is seized. Sometimes the pulley bearing seizes and ruins the front...
Question
BOTH AC FAN AND RADIATOR FAN NOT COMING ON
The problem you are describing likely stems from an electrical fault which would include things like a break in circuit wiring, bad grounds, relays, fuses, resistors, the fan motors themselves as well as the engine cooling temperature sensor. If engine...
Question
ac compressor clutch not engaging
Let's assume the clutch is not engaging. The clutch coil should simply be tested to determine if coil failure is the cause and it's easy to do. The integrity of the clutch coil can be tested on the car using...
Question
We have replaced the compressor in my husband's Toyota Tacoma 3 times in as many years. What could cause them to keep failing? 2001 Toyota Tacoma
Hello - when the AC compressor fails, it can deposit a fairly large amount of metallic debris throughout the AC piping and components. It is VERY difficult, even with chemical flushes, and added filters, to get all the grit out...
Question
AC Thermostat
Hi there. Check the thermostat on the air conditioning system and see if its freezing up again by shutting off the vehicle and letting it sit for about 30 minutes. If you see frost on the evaporator, then the system...

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