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possibility of problems with inline high side filter

wirenet on Sat August 02, 2008 12:24 AM User is offline

Year: 1992
Make: Honda
Model: accord
Engine Size: 2.2
Refrigerant Type: r134a
Ambient Temp: 87
Pressure Low: 44
Pressure High: 150
Country of Origin: United States

I purchased your high side filter and installed it in discharge side next to the evaporator I charged the system with 24 ounces of 134a.The low side pressure was 44 psi with 90 degrees outside,the high side was 150 psi. My output temperature while sitting was 52 degrees and 47 when driving.Two weeks went by and one day I start my car and I smell this burning smell I pull over and my outside clutch coil is shooting flames out I turned off the power so my belt would not break. A few days later I took my high side filter out and noticed the filter was clogged and an accumulation of oil.I ask the question did this filter cause my compressor to go out and if it did why use a filter if it going to cause this problem.I have a refrigeration back ground but not automotive ac experience.

TRB on Sat August 02, 2008 12:31 AM User is offlineView users profile

Never herd of this filter trapping oil. Only way that could happen is if there was still a ton of debris in the system. Filter should never be used as a measure to replace the flush procedure!

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HECAT on Sat August 02, 2008 7:55 AM User is offline

Quote
Originally posted by: wirenet
I took my high side filter out and noticed the filter was clogged and an accumulation of oil..

The filter is designed to catch minimal rouge debris and cannot be used as an alternative to flushing. The accumulation of oil found is normal as the oil migrates, and would accumulate more at a restricted screen. Whatever the material is that clogged the filter is the problem, not the filter.


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FLUSHING TECHNICAL PAPER vs2.pdf 

JJM on Mon August 04, 2008 3:22 AM User is offline

Filter serves several functions. First, it is used as a diagnostic tool. After a system is serviced, a filter is installed and the system should be charged and test run. After some time in operation, the system is discharged, and the filter inspected for debris. If there is debris, the unit is replaced. In some cases, this operation might need to be repeated several times.

Some manufacturers actually specify the use of filters as opposed to flushing. I prefer flushing, and replacement of components that can't be flushed.

The second function of the filter is an insurance policy - which is what I use filters for. If a previously known contaminated system was serviced, after the contamination is believed to have been eliminated, a filter is added as an insurance policy. This is an especially good idea if the compressor, condenser, accumulator/dryer is replaced, but the evaporator or another component remains. You definitely don't want to damage new, expensive parts.

No filter in the world can help a severely contaminated system, just as no oil filter can protect an engine if there's sand in the oil, no fuel filter can protect the fuel system for sugar in the tank, etc.

Joe

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