How To Know If You Have A Worn Compressor Piston?
The compressor is one of the main components of the A/C system. Its purpose is to add pressure to the system by drawing refrigerant and compressing it. The fluid will flow from the compressor to the condenser. By doing so, the refrigerant will lose its heat and from hot gas and then converts into warm liquid. However, problems can arise with issues such as worn compressor pistons. Let’s find out more!
How to Diagnose a Worn Compressor Piston
One of the issues that a worn compressor piston can cause is low suction pressure. The most straightforward solution is to replace the compressor. Other causes of low suction pressure include:
- A leaking compressor head gasket
- A leaking compressor suction valve
- Excessive moisture in the system
- Flattened or kinked hose
- Shortage of refrigerant
- Debris in expansion valve or screen
Troubleshooting Your A/C System Like A Pro
- Use a recharge kit to test your A/C system. It may comprise R134a refrigerant bottles and/or UV dye. It helps uncover leaks.
- Switch on the A/C and set the fan to high, temperature selector to the lowest setting, and make sure the recirculate light indicators are on.
- You would want to make sure that the cooling fans on radiator are running when the A/C is on.
- Identify the location of your compressor and ensure that it is engaged. Check to see if the puller chain to see if it is spinning or not.
- Next, located the low pressure A/C recharge port and check the pressure while the car is running.
- If the system is low, you will need to recharge the system without putting air into the system. Simply follow the instructions that come with your recharge kit.
- You can continue charging system if the readings are moving toward the normal range. If not, there could be a major leak. This is the time to use the UV dye to track the location of the leak. Be cautious not to overcharge the system as well.
- Check the fuses. Look under the dash or under the hood to locate the fuses. Once you have found the A/C fuse, make sure that is not blown.
- Next, check the clutch itself. Find out if there is voltage going to the clutch or not. Chances are a fuse may be blown, a cycling switch may have gone bad, or there is a lack of refrigerant pressure.
- Check the relays, as well as the operation of the A/C button and the climate control. Check the cabin air filter to make sure it is not clogged.
- Check the blower fan. You may have a problem with the blower fan if you are getting any air cold or hot.
Diagnosing problems with an A/C system can be a complicated process. You should always wear a pair of gloves and safety glasses. Try to keep any loose fitting clothing and body part away from moving parts. If you encounter problems not covered above, it is recommended that you consult with a professional mechanic.