A/C failing

[alia176]

Originally Posted by rlutz

I just did a check on my '92 Claret, and got a climate code 15:

15/25 .......... Open/Short In Refrigerant Temp. Sensor Circuit

This fits with my symptoms. The a/c comes on slowly and is cold, but shuts-off in a minute for no reason. If I shut off the engine & restart, it comes on cold again. If I do this a couple of times it will stay on cold. I was thinking it was some kind of sensor problem, because it seems to stay on if the rpms are up over 2000 on the highway.

Anyway, the troubleshooting "how to" document says to pull the glove box and check the resistance on the harness and or replace the sensor. I'm thinking with my symptoms I should just replace the sensor (anybody got the part # handy?). Is the glove box hard to pull? Anybody got a link to some instructions?

Glove box not super hard to pull. Do a search and you'll see nice pics of someone else doing a nice writeup.

Are you absolutely sure that you have enough refrigerant in your system?

[rlutz]

Originally Posted by alia176

Glove box not super hard to pull. Do a search and you'll see nice pics of someone else doing a nice writeup.

Are you absolutely sure that you have enough refrigerant in your system?

Pretty sure, had a new compressor put on 2 years ago, and it sure acts like a sensor problem. All I have to do is switch off the car for 5 sec and restart, and it blows cold again. If I leave it on "auto" (with no fan speed selected) the fan stops too (until I reset it, then it starts to blow in a few seconds, and it's perfectly cold). Once I reset it a few times, it blows cold continually. It's really a turn-on turn-off problem, not a cyclical, low refrigerant problem where it blows cold for a minute and then warm for a minute and so on. Also, I don't see why low refrigerant would throw a code 15 on the self diagnosis.

I think its the "a/c refrigerant temperature sensor". Unfortunately, I'm having a hard time finding the part number. Does anyone know if #4 on the link below (they call it an "overload sensor") is the same thing?

http://www.parts.com/oemcatalog/inde...layCatalogid=0