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Old 06-13-2013, 12:53 PM
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A/C question: Recharge or repair?

I have a 2000 7.3 Excursion, and I live in Phoenix. The A/C is blowing cool air, but it seems to take a long time to get that way, and it doesnt get as cool as I'd like. It always seems like its just a little too warm in the truck.

So, I bought a 18 oz can of 134a+ with a gauge on it, found the low-side port and hooked it up. With the a/c running in the cab, pressure reads ~100psi (should be between 45 and 55 psi with the outside temp being ~100*)

So, I didnt add any refrigerant, and I'm curious: Is there something else causing my AC to be on the weak side? Or am I not doing something right?
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Old 06-13-2013, 01:04 PM
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What's the interior temp?
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Old 06-13-2013, 01:10 PM
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Quote:
Originally Posted by TBJK View Post
What's the interior temp?
Do you mean What i the temp in the cab, when I hook up the can to the low-side port? The a/c hadnt been running for very long at that point. Probably pretty close to 110-120* as the truck had been sitting outside.
Or what is the temp after I've been running the a/c for a while?
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Old 06-13-2013, 02:13 PM
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There are many factors for high pressure and low temp, could be a clogged or dirty condenser (the little radiator in front of your intercooler and actual radiator) could even be a failing clutch fan not pulling enough air through. It would greatly benefit you if you can hookup to both high and low side with gauges to go further here with diag.
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Old 06-13-2013, 03:31 PM
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As he said there are many factors, condenser condition, evap core dirty, evap fan blades dirty. You need to have optimal conditions inside the cab to really go by gauges anyways. Get the cab to a normal temp then check pressures
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