I have a 92 Ford Explorer, and have a a/c question?

Question

where does the o*****e tube go? when the compressor turns on, both lines have pressure, the lower line is not cold, but rather cool. the a/c is not cold at all. What could the problem be?

Answer 1

You need to charge the system. o*****e tubes rarely fail unless they become clogged with debris, which is a sign of a failing compressor. The suction line and accumulator should both be cold to the touch with a fully charged system. Unfortunately '92 models still used R-12, so unless your system has been converted to R-134a you're going to have a hard time finding R-12 to top the system off.

The o*****e tube is located in the high pressure line. You should see a fitting right before the line enters the evaporator, that's where the tube will be. The line should feel hot before the tube and cold after it.

Answer 2

try adding free on

Answer 3

Mr. Cool had an excellent response. If I may add – do not just arbitrairily add freon. Each refrigerant system functions it’s best at a given freon charge. Overcharging (too much freon) can be just as bad as not enough. Get a mechanic certified in AC repairs to do a pressure check of your system. This can also reveal other problems that may exist. Also, I noticed when I converted my ’93 Blazer’s AC from R-12 to R-134a, that the cooling efficiency dropped off a bit. Most R-12 systems I have been told, have smaller passageways, and although R-134a will work in them, it cannot perform to it’s fullest potential as it would a system that was designed to work on R-134a.

Another thing you might want to consider – with that old of a vehicle, there could also be the possibility that your evaporator may be dirty. This would restrict the air flow across the fins and hamper the heat exchange (cooling ability) across the unit.