A/C not blowing cold- Where to start?
 

Was driving home when i turned on the AC and there was no cold air coming out. I believe my 93 rx7 has a closed AC system and dont believe it needs freon. Where should I start to look?

Don't know which exact fuse but, I had that problem and it was a blown 15amp fuse under the hood.

Front block, middle 15A fuse. I'm very familiar with that damn thing.

If the fuse is good, then listen for the compressor clutch engaging when the switch is turned on. If it is not engaging, then you've got a bad compressor. If the compressor is working then look at the sight glass on the dryer reciever and see if there is freon flow when the car is running with the ac on.

I just had my A/C go out too. The compresser suddenly stopped turning on. However I believe if the freon gets too low it automatically disables itself, I'll get back to you guys when I figure out what it is.

There is a low pressure switch which disables the system if the freon gets to low.

Also you can check for freon by using a screwdriver to press down one of the valves. They are located by the turbos just around the pass. side strut tower. If just air comes out then you have yourself a freon leak.

Do NOT get freon in your eyes!

Check all connectors on the circuit. Sometime corrosion can cause the compressor to not turn on.

I had my A/C go out on me. I blindly took it to a A/C shop. They said that I had a Freon leak due to a broken pipe/tube that they had to weld. It ended up costing me $400! They also had to convert my car to the the ozine friendly stuff r-somethingorother.

So check under the car and see if there are any glaring defects to the A/C Tubing...

my .02

John

What do you mean "front block"?

IMO, the most forward-located fuse location (fuse block).

Also, Freon will leak (albeit, very slowly) even from a perfectly-functioning system. Having low Freon in a 15-year-old car would be almost normal. BTW, some AC service locations may still have a supply of R12 squirrelled away just for old systems like these.

mine only works on on fan speed 1and 2.
3 and 4 no cold air. Try that.

I used to have an issue with my ac compressor turning on and off. When it was on the a/c would blow cold, then when off itll be warm.

Try taking out your dash and getting to the electrical board behind it. That controls the ac compressor. I had to adjust this one screw and that did the trick.

:crzyeye:

WOW. Not to step on any toes, but WTF?
A/C becomes inop for a few reasons - electrical or mechanical
Generally when the A/C stops working it's because the system is low on charge - which means you do have a leak. Some places around can still recharge with R12, but it's a bit expensive - $3.00 an ounce around here. The BEST replacement for R12 is R12-A. It's an enviromentally friendly R12.
The other reason is electrical, which does not normally happen, but a faulty low pressure switch, control head, or compressor clutch can cause such.
I'd suggest taking it to a dealer and have them check out the A/C. Without guages, you cannot tell if it's charged or not, and in turn, be able to charge it and see a leak. If it's charged, then you can go down the path of figuring out why it's not turning the compressor clutch on, or if it is, why the clutch is no engaging.
Do you have any cooling at all? You may hear the clutch cycling quickly (indicates low charge), or not at all (indicates all the possible faults i listed above).
If your clutch is on and working on a regular basis (10-20 seconds between on and off), you may have a problem with a blend door (the thing that diverts air from the evaporator to the heater core).

So there are many things that could be wrong, and again, i suggest you take it to a dealer and have it looked at.

LoL talk about thread resurrection.

One thing you can do to see if it's a leak or some other problem is go get it charged up. If it works for a while then stops working, you've got a leak somewhere.

If it doesn't work with a full charge, then its the compressor/switch/etc.

Expensive but it can save you some time. Also there are places that can inject a UV dye into the coolant to check for leaks.

omg this made my day i guess you guys didn't realize this thread was started in 02. i'm pretty sure he's fixed it by now since it's been over 7 years lmao

I am having trouble with my A/C and used the search function to locate this relevant thread. All this new information is very helpful for solving this issue.

Yep very relevant, I had the same issues myself with my AC system.

I got it charged up and it would blow so cold it would freeze your nipples. It would work for about 2 days, then slowly go down to nothing.

Unless you need to start digging behind your dash it's not so bad.

I bought all brand new o-ring set from Black Dragon automotive and replaced all the orings I could get to and that solved my problems with the slow leak.

**** glove box