94 Mustang a/c blows hot, compressor is on, and freon is high?

Question

Ok, the wife wants her mustang to have a cold a/c, but the freon is plentiful and the compressor is kicking on. what's next on the check list? Thanks, and go knock off the Iranian pres.

Answer 1

If it's a 94 passenger car it should be R-134 a,
only commercial vehicles were excepted and built for R-12.

Without gauges it's hard to tell what goes on, the old trick with hands on high side and low side tubing to feel the difference in temps, many wouldn't understand anyway.
There isn't really any proof that the compressor is working by only looking at the rotating pulley, the clutch has to kick in.

I'm tempted to say, pull the plug from the low-pressure-switch, put a jumper across (usually needle-nose-pliers or a pair of tweezers fits best) and presto you know what's going on.

It could be that the heater doors are stuck or in the wrong position, or that the control that does this is malfunctioning.

I'm licensed and do this for a living.

Answer 2

First of all, how do you know that your R134A is plentiful?? Second, with out knowing what the pressures are there is no way of telling if you system is overcharged (which will cause poor cooling) this would be indicated if the low side pressure is high and the high side pressure is high. Next, there is a possibility that your compressor is turning but not compressing in which it will have to be replaced. My best advice is that if you don't have a set of gages and you don't know what your doing you are far better off taking it to a professional for a diagnosis. good luck.

Answer 3

Anybody with guages and an underatanding can check their own a/c system. Alot of auto repair books will give you some idea of what to look for. If the pressures are correct, I would make sure there are no vacuum leaks at the hoses that go into the firewall. If they look good, check for proper blend door operation witch is the door under the dash that blends hot and cold air in the plenum.

Answer 4

how do you know the freon is fine. how did you check it cause ou do know according to the epa no more back yard mech can charge there own atuo sc you must take it in to the dealer or a cert ase ac tech to have them check it and if the unit is a old R-12 and you put in the new R-134 you cooked the unit and now the whole system has to be change out to adapte the new R134 system

Answer 5

Sence this system works with very high pressure.You should take it to a good service shop or dealer.That way they can find the problem and repair it without causeing more of a problem guessing.Hope this helps.

Answer 6

intense compressor grab hollow, or too lots voltage drop to the grab, probable the low tension decrease off swap is going undesirable. the grab is gapped with shims, and whether it truly is out of spec.(uncertain approximately specs, yet .020" is stable)you may eliminate the front grab plate and eliminate adequate shims to get to suitable hollow. you may examine voltage drop by ability of making constructive you have a similar voltage on the grab cord as you do on the battery(or interior of .3-.5 volts). consistent with probability the grab coil magnet is in basic terms wiped out. if none of that facilitates, i dont care. i dont care approximately your locks or homestead windows the two.

Answer 7

1994 & up is R134 so if it's a vacuum control system (Ithink it is)there is either a vacuum leak to the A/c low pressure control side or the probe is defective

Answer 8

oil charge and check for leaks.also u DO NOT have to change out from r12 to r134 and u do not have to take it to a tech. auto zone sells the r134 kit. for the do it yourself back yard mechanic