#CAR AC COMPRESSOR REPAIR MANUALS#
#CAR AC COMPRESSOR REPAIR INSTALL#

The most important step is proper flushing. If you see these signs of metal chips and debris make sure that you follow the above steps to protect the new compressor. You can also drain the oil out of the old unit and examine the fluid for suspended metal flakes.Īnother telltale sign of internal compressor failure will be metal chips and debris clogging the orifice tube screen. When you remove the original compressor signs of this failure will be metal flakes around the outlet port. Car AC Compressor ProblemsĪs you can see from the instructions above an internal compressor failure that has spread metal through the system is a challenging repair for even the most experienced automotive mechanic.

When these fans malfunction the AC compressor is pushing against pressures much higher than normal conditions. Failure to diagnose additional problems can cause the new unit to fail again.Ĭondenser and combination radiator fan motors are components that can cause these failures, because of high system pressures. Many compressor malfunctions are the result of another failed component within the system. Each component in the system must be evaluated. Improper refrigerant charges are another major cause of premature failure of car ac compressors and poor system performance.ġ0) When you’re finished with your repairs conduct a complete system performance test. Use a scale, metering device or buy different sized cans to ensure the proper amount of refrigerant is installed, specified by the vehicle manufacturer. A minimum of 29 inches of mercury for one hour to insure moisture and residual flushing solids or boiled from the system.ĩ) Recharge your air conditioning system using the recommended Freon only. Be sure to follow any and all instructions that come with the replacement air conditioning compressor.Ĩ) Apply a vacuum to the car ac system.

#CAR AC COMPRESSOR REPAIR INSTALL#

Some suppliers of re-manufactured compressors install the oil in their unit. This will prevent possible debris from entering and destroying the replacement unit.ħ) Add the proper type and amount of ac oil as per manufacturers procedures.

#CAR AC COMPRESSOR REPAIR MANUALS#

Refer to your car repair manuals for vehicle specific instructions.ĥ) After installing the replacement compressor on the vehicle ensure proper mounting and belt alignment.Ħ) It is recommended to install an in-line filter in the suction line near the compressor inlet. Note: some Dodge and heavy duty trucks use an expansion valve instead of an orifice tube set up. This would include the orifice tube and screen that most vehicles use today. Once each component has been flushed of all contamination it is necessary to air dry these components using compressed and/or filtered shop air to insure no flushing solvent remains.Ĥ) Replace the accumulator or dryer and all expansion devices. It’s retained by a small snap ring and sealed with an o-ring.ģ) Thoroughly flush each component not being replaced with an approved AC flush solvent. It must be transferred over to the replacement part. On many GM models the high pressure cut out switch (red) is located on the back of the compressor. Transfer any switches, sensors, brackets, or manifolds from the original compressor to the replacement unit. Identify and remove refrigerant in accordance with any state and federal regulations before working on the vehicle.Ģ) Remove the failed compressor from the vehicle. I thought I would provide the steps so you could see what’s involved in compressor replacement.ġ) Always wear eye protection. The following instructions were provided in an air conditioning compressor replacement kit that I recently installed. This is why the debris can be challenging to remove and cause repeat compressor failures. These fragments stick to the thin oil mixed with the Freon which is how the compressor is lubricated.

Car ac compressor repair