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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
A/c blows cold on max but when you change temp, the air gets warm.
There is an issue with the thermostat for the air conditioning system. The adjustment switch to the air conditioning system may be defective and not adjusting the thermostat properly, but instead it is opening the vent to the heater core...
Question
A/C compressor needs to be replaced on my 2008 Infinity M35. Would you save money and use an after market part or use Infiniti? 2008 Infiniti M35
Hi there - there is actually a 3rd answer that is best. Infiniti doesn't make AC compressors (nor does most any other auto manufacturer). These are made by 4Seasons, Sanyo, Denso, Hitachi, etc. Replacing the compressor correctly means getting an...
Question
I have a 2004 Honda Inspire. Since having this car, i never had any issues with it. Now it tends to idle at times, then the AC on
Hello, thank you for writing in. You may have several issues going on at once. With the mileage of the vehicle being just over 100,000 miles, you may want to consider several maintenance procedures and updates. When it comes to...
Question
My MAZDA 3 2005. The air conditining was getting charged and the man was having trouble saying that the AC wasn't going cold at all.
Check the air conditioner compressor and see if the compressor is making the noise. If the noise is coming from the compressor, then the compressor could be out of oil or there could be something wrong with the compressor internally....
Question
What is it called and how much to replace?
The air conditioning compressor uses "refrigerant oil" and so if there is a leak on a fitting to the air conditioning compressor it would have to be refrigerant oil. However, it is also possible that the leak is motor oil...
Question
Ac compressor fuse blows 2004 Ford Taurus
Hi there - from your symptoms, it sounds like your AC compressor clutch has locked up, or the clutch bearing has seized, such that the serpentine belt tries to turn the compressor whenever you start the engine. (REALLY problematic if...
Question
HVAC controls don't work. All fuses are good and the relay works. there is still no power to HVAC unit.
Hi there. Check to see if there is power to the air conditioning controls. If there is power to the controls and there is power to the fuse and relay, then the air conditioning controls need replaced. If there is...
Question
Car engine recently overheated 2006 Ford Focus
Hi there - yes, it is normal for the AC compressor to cycle on and off. If it is doing this frequently however, like every 10-15 second or so, this can be an indication that the refrigerent level is low...
Question
When I turn on the a/c, the car begins to shake then turn off.
Hello - your symptoms suggest that the idle air control valve is not kicking up the idle when the AC comes on (this should be automatic). It's also possible that another component (leaky injector or worn spark plug/coil) is borderline,...
Question
Need to know the A/C relay location on a 1982 European Mercedes-Benz 280sl.
The relay is on the driver side right next to the brake booster and master cylinder. It looks like a large black block by the fender. For the compressor to not have power to it, check the low pressure switch...
Question
Want to change from single climate control to duel control 2008 Chrysler 300.
The air conditioning system under the I/P is different between the single zone manual A/C system, and the dual zone automatic A/C system. To make this change you need to remove the I/P, replace the air conditioning system, the I/P...
Question
I started my car and turn on AC but it would not start.
It will take a bit of deeper diagnosis to tell what is going on with the vehicle as it seems you have multiple concerns going on. An air conditioning system with a low refrigerant charge may not turn on because...
Question
My heater is on but is not blowing hot air
You heater a/c system uses electronic actuators to control air flow for where the air comes out and hot hot and cold the air is coming out. You will need to first check to see if the actuators are moving...
Question
does the repair include coolant recycling and line drying
Refrigerant cannot be charged to an empty system without first thoroughly evacuating the system, preferably down to 500 microns. Therefore, if you see a price quoted for charging an empty system, of course that includes a proper, professional and complete...
Question
What can I buy to check for leaks in the hoses
Hello, thank you for writing in. The quickest and easiest way to locate a leak in the system is to use a dye. It is added to the refrigerant and cycled through for a few minutes running the AC on...
Question
I drive a Suzuki Alto 2009 model. May car recently just a few days ago started having this vibrating problem which I could feel when I start the engine.
Check the brakes and see if they are disengaged. Try taking the vehicle and pushing it by hand with the engine off and the transmission in neutral. If the car moves easy, then the air conditioning clutch on the compressor...
Question
Could my compressor be affected by a bad thermostat? 2007 Infiniti M35
The thermostat should not affect the A/C compressor blowing cool air. The thermostat regulates the flow of the coolant in your car's engine and controls when the coolant flows in and out of the motor from the radiator by opening...
Question
Can you bypass the AC compressor? 2004 Chevrolet Trailblazer
Hello - if the AC compressor clutch and bearing are still OK, you can simply unplug the wire to the compressor clutch, and the clutch pulley bearing will continue to turn with the belt, and no other action is necessary....
Question
Car only throws heat out on driver side and cool air on passenger side in summer a/c works very little
Hello, thank you for writing in. The air temperature coming through the vents has more to do with where the air is coming from. If the heater is running it will be passed along the heater core and pushed into...
Question
Car starts to overheat when the A/C is turned on, but it is fine when it is turned off.
The issue is either the compressor clutch is failing or the compressor is low on oil and is seizing up on the air conditioning system. I recommend seeking out a professional, such as one from Your Mechanic, to help you...

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