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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.
P0508 OBD-II Trouble Code: Idle Air Control System Circuit Low
P0508 code definition When this code appears and is stored in the onboard computer, it means that the idle air control system circuit is low. What the P0508 code means The...
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 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 ac compressor quit working in my 2016 vw jetta what could be the main cause for this being brand new?
VW has seen a lot of problems with these compressors and has issued a service bulletin on some of their 2015 and 2016 cars. There is a defective regulating valve that causes compressor failure. In many cases they are performing...
Question
Air conditioning blowing warm air suddenly.
Hello, thank you for writing in. An air conditioner that is blowing warm is typically an issue with low refrigerant pressure. This can be due to a sudden leak, or it can be due to a failed A/C compressor. The...
Question
Chevy captiva 2014. A/C running warm. Will not recirculate. And even though I have it on face vents, it blows thru them AND bottom
Hello, thank you for writing in. The vehicle is likely having more than one issue at once. The blend doors control the flow of air through the vents and the cabin. If they are unresponsive, you may have one of...
Question
Front Ac unit stopped working but rear ac unit is making weird noises
You will need to have the control panel and electrical system tested to see if you have module or electrical issues. A mechanic like one from YourMechanic can diagnose this problem further to isolate the cause for the front unit...
Question
I recently had my radiator, fan assembly, and thermostat replaced and cooling system flushed on my 2004 Chrysler Pacifica. Prior
Before the overheating problems were fixed you may have leaked out some freon and would need to have pressures in the system checked to see if it is low on freon refrigerant? If it is low then have system recharged...
Question
My 2001 automatic Miata idles really rough at stoplights when I run the AC, but not when it is off.
Hello, thank you for writing in. Two aspects about the issue lead me to believe the previous technician is correct. To start, the compressor is the only component that will effect the engine, as it is the part connected to...
Question
Hi, my name is Jorge from North Houston, TX, and I'd like to know the location of the Expansion Valve (Orifice Tube) for 2011 GMC
Your vehicle has an expansion valve mounted at the firewall behind the two a/c lines where they connect to the evaporator assembly. You will need to evacuate the a/c refrigerant and remove line connection and then unbolt the expansion valve....
Question
The clutch on my ac compresser is leaking out really thick black tar like stuff when it is spinning. What is it? And why is it doi
Hello, thank you for writing in. A black goo coming from the air conditioning compressor is more commonly known as "black death". It occurs when the refrigerant in the air system breaks down and is no longer the chemical it...
Question
I'm wondering if it'll be a good idea to take out the whole ac compresser from my car?
The check engine light is supposed to come on if the controller detects a problem with the car that would effect the vehicle emissions. So it warns you of bad sensors, air leaks, misfires, overheating, and that sort of thing....
Question
My 2013 Mercedes benz c250 ac won't work, it blows hot air and the ac button light flashes red three times and then turns of
Hello. On this vehicle for it to be acting up like this it typically means that there is a programming issue with the HVAC unit. It is also possible that the system has a small leak if it has been...
Question
After replacing instrument cluster a/c clutch will not engage
You may have pulled loose the connector to the a/c controls or if you did not have the battery disconnected blown a fuse. Since the cluster is on the computer network and the a/c is also you should have the...
Question
No air blowing and compressor not coming on
You may have two different problems or the a/c control switch went bad. The blower since it has power then the blower resistor or blower switch may be bad. For the compressor not coming on you would need to have...
Question
air conditioner blows cold, then warm
You might be on track about the system being overcharged. But that can only happen if the system was recharged and then too much refrigerant or oil was put in. But there are other reasons why the high side pressure...
Question
my ac compresser in my 2004 pt cruiser works then shuts off
Hello, thank you for writing in. If the compressor is cycling when it should not be, there is an issue with regulating temperature. You want to look at the pressure switch going to the compressor. If it is not to...
Question
A/C starts cooling but then stops completely after a few miles. Used to hear the expansion valve operating but don't anymore.
The problem sounds like the expansion valve is stuck in one position and not regulating refrigerant flow through the evaporator causing the pressures to be too high on the high side and too low on the low side. Have the...
Question
Where the orifice tube on 2013 Chrysler 200
Hello, thank you for writing in. The orifice tube is located in one of several places. For your make and model, you should be able to locate it between the condenser outlet and the evaporator inlet. It will be placed...
Question
2013 A6 Quattro 3.0 AC blows hot air. Changed the AC compressor, receiver dryer, value and flush. Car is still blowing hot air. N
Hello. If the system was properly evacuated and recharged and the compressor is still not turning on then it is an electrical problem. Most of the time it is the result of a faulty clutch relay so that is what...
Question
Engine drag w/ a.c on
The a/c system has an idle up function and that should be checked. If the idle up function is not working properly, when you turn on the a/c the engine will bog down. You are also describing overall poor engine...
Question
Brand new ac drive belt snapped after ac compressor replacement
Adjusting the gap on the AC clutch is something we used to do years ago, but it's usually unnecessary on later model cars. The two things that would lead to a belt breaking are slippage or miss-alignment, Slippage could happen...

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