| Roof and Dash A/C Outlet Temps [message #285911] |
Wed, 26 August 2015 13:10  |
gbarrow2
Messages: 765
Registered: February 2004
Location: Lake Almanor, Ca./ Red Bl...
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I used a probe type meat thermometer and a flat reefer thermometer to read the outlet air temp of each of my roof a/c's. OAT was between 70 and 80 sitting in the driveway.
Both roof a/c's got down below 40F to about 36F on each thermometer.
Took a road trip to test the dash a/c with the same 2 thermometers. OAT a little warmer but still below 80. After 1/2 hour driving at country road and highway speeds the lowest reading was about 40 on the meat probe stuck into the below the dash outlet and 50 with the refer thermometer laying on top of and in the air stream of the same a/c register.
Dash system is charged with Duracool. Pressure on the low side at 1500 rpm was 1/2 way between 0 and 25 on my gauge of questionable accuracy. It has no increments in the green zone just zero and 25.
Question is: Is that as good as can be expected from the dash air? What should the outlet be on a proper system? I can add or bleed off duracool to see if it improves.
The dash compressor has over 200,000 miles on it and seems noiseyer than in the past.
As compressors age and wear do they become less efficient and affect cooling temps?
Any suggestions to improve dash air cooling?
Gene Barrow
Lake Almanor, Ca.
1976 Palm Beach
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