23/08/2019
Its a common misconception that you can just replace a faulty compressor with a new one. You need to find out why the original one failed in the first place.
Quite often the compressor has failed internally, due to a lack of refrigerant, oil, or both. Prior to fitting a new compressor, the old one must be checked for contamination.
The first image shows a failed compressor that has been stripped down. In the image, you will see heavy deposits of metal filings, and at the base of the piston, the pad that keeps the piston on the drive plate has become somewhat squashed. This has been caused by the piston seizing in the barrel, the metal filings have come from the overheated, under lubricated components. The debris caused by this compressor failure will be carried around the air conditioning system, contaminating the oil and the other components in the system. If you just fit a new compressor, all of this debris will be carried into the new compressor, resulting in premature failure, and quite possibly the new part will be rejected under warranty.
The second image shows debris collected on a refrigerant metering device, This has all come from a failed compressor!!!!
The third image illustrates the debris that has been collected during a system flush. Using a suitable flushing agent, and oxygen free nitrogen, the flushing agent removes the debris and any oil, which is then collected in a suitable container. Several operations are carried out to make sure that all of the debris is removed. It is only when the system has been correctly flushed, that a new compressor can be fitted. It is important to know that a new receiver drier and metering device be fitted, as these components cannot be be properly cleaned. We regularly carry out air conditioning system flushing, as compressor failure is a common problem.
Please contact us for all of your vehicle air conditioning requirements