Quote:
Originally Posted by 92snowmachine
what pressure where you at and what was the ambient temp?
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Good question and this is where it gets dicey.
When the system refused to turn on last month, the low and high pressures were about 120 psi with ambient temp around 75°. The comp wouldn't run on this particular day.
Two days ago, the same thing happened and I watched the comp while the gauge was hooked up to the low press side. I used the cheapo gauge that comes with the can. This is more portable and easy to use when I want to do a quick check, while I'm running around doing errands, to see what's going on. The low pressure was 130, ambient at 80°. The comp would cycle on for about ten seconds and the pressure would drop to approx 40, and then shut off and pressure return to 130.
Yesterday, ambient temp was around 82°, the a/c system ran perfectly all the way home. No issues what so ever
Vent temp was at 60°.
According to this
linkie, high pressure at the low side could be one of three things:
- Expansion valve opened too wide (mine is less than five years old)
-Heat sensitizing tube faulty contact (this could happen, I suppose)
-Too much refrigerant ( I did add a can of r134a last month)
Attached is a pic of my evaporator before re-installation.
I'll take my manifold gauge to work today and hook it up at lunch to see what's going on and report back with more concrete numbers.
Thanks