well i was on my way to visit my friend in a nother town and as we were driving along the a/c just shut off. after it shut off i would turn it off for a while then turn it back on and it would blow hot air. any of you all hear of this? i thought it would be the blower motor but it stills blows after i turn it off and on, then i thought it would be a loose connection but then why would it blow hot air. not sure kinda depressed, just want my car back.

 

Warranty covered hopefully?

 

yeah its still under warranty, ive owned it 1 year and have 19000 miles

 

Cool, you got lucky then! Hope everything works out!

 

If you notice, the a/c system is vulnerable to damage. The condensor and some of the a/c lines are exposed to the outside. If a car or truck kicks up a right size rock or pebble in front of you, it could POSSIBLY hit those exposed parts I mentioned earlier and that won't be covered by warranty...

 

well i called a while ago and they said they still couldnt figure it out, any input? anyone

 

Have you had the level of Refrigerant checked? Sounds like the "Low Pressure Switch" is kicking in. This shuts the a/c compresser off so that it dosen't get damaged by pumping air.

 

/\/\ It may be just as simple as needing to be re-filled

 

Yeah, but refilled means something else has gone wrong to
let the 'frigerant out!

 

I hope they gave you a loaner.....

 

my understanding is that over time after a Refrigerant has changed states over and over carrying heat from the cabin to the outside it's moleclular bonds weaken and break down, turning into an atmospheric vapor consisting of seperate atoms of hydrogen, florine, and carbon.


Refrigerant is sent to the compressor in the state of a low pressure liquid. Hydrogen as itself is a gas at low temps, so is florine, leaving carbon as a gas also on its own.

Refrigerant dosen't nessesarily have to be "let out" in order to cause the LPS to engage. Broken down refrigerant, cannot on it own change into a liquid.


Your best bet is to have it leak tested preferably by a fluoresent leak tracer, and if you have no leaks then you simply just need to have ur lines flushed and recharged via a recycling/reclaiming machine at the dealer.

 

i hope your warranty covers this

 

I'd check if there was a loose connection on the compressor clutch, it sounds, like others have said, like the compressor isn't working right.

 

well im hoping they let me know something by tomorrow i didnt get a rental because my wife picked me up from the dealer and i have another car for work

 

well, i got my car back and as soon as i drove it off the lot the a/c went out but i think it is the switch in the dash im going to take it back next week.

 

R134a does not fragmnet at any atainable temp in an a/c system. No liquid goes to thecompressor it is a low temperature VAPOR. If liquid goes to the compressor it will attempt to compress it and we all know you cannot compress a liquid. If the system is low then it leaked it does not turn into other stuff. I have seen systems 10 years old with the original r134a in it and it still cools great. If the system is full but you are still having trouble I would suspect a bad expansion valve. It can be an intermittent failure and can be tough to duplicate. It is the only mechanical component in the system that can cause an intermittent failure you describe.

 

whoops

I only got a B in auto heat and air

 

i wish it was R12 now THAT was AC!

 

I had an interesting problem with my Toyota Surf in Japan when me A/C went out. I refilled the system and put new seals on everything I could. A/C ran great for a bit then a few days later it was hot again.

(I'm not fluent with A/C parts talk so forgive me)

I pulled the radiator-like part out from under the dash. I pulled the expansion valve and found it was clogged up with this rubber glue looking crap. After showing this to a Toyota mechanic, he told me it looked like the stuff from the tank that removes moisture from the lines (I think, I can't remember what the part was called, but I knew what he was talking about) I pulled this tank out and sure enough, when I shook it, pieces of that same crap came out. I replaced the tank and the expansion valve and everything was back to normal.

Can one of you fellas who know A/C systems school me up on part names? That tank with dessicant and what that radiator part is actually called...

 

Receiver drier and condenser