Automotive Air Conditioning Information Forum (Archives)

Blazer74 on Thu August 23, 2012 2:04 PM

Year: 74
Make: Chevy
Model: Blazer
Engine Size: 350
Refrigerant Type: 134
Country of Origin: United States

Hello, have searched. Is there any disadvantage to placing the filter before the condenser
Vs after. New system Sanden Conversion, all new parts including parallel condenser. R134.
Thanks, Craig

GM Tech on Thu August 23, 2012 8:59 PM

Filters are there to protect the compressor- putting it after the compressor doesn't make much sense to me-- I prefer mine right in front- or as close to the compressor as possible- plus debris is easier carried in the liquid state of refrigerant than in the gaseous state.

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The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......

Leggie on Thu August 23, 2012 10:44 PM

If the system has an accumulator that serves as the filter. In-line filter would be to protect the orifice tube from plugging.
Shrapnel can go both ways so if it's a TXV system inline filter needs to be on suction side.
Airsept has a nice filter that goes right by the compressor

Blazer74 on Mon August 27, 2012 11:52 PM

Put it after the condenser, thanks Craig, Just thought putting it before condenser would save parallel condensor if comp failed.