Hi everyone, my first post here, nice forum

I have a problem and I hope someone will help me with it. My air conditionning unit (AC) doesn't cool the air. Here's what I've done (all day today):

Tested all the AC-related relays and fuses (under dash and under hood). The red wire going to the temp control sensor from the relay is fine and there's 14 volts on the Field Coil (right after the Temp sensor) when the car is running and the AC switch in ON.

The air is still warm and the heat exchanger (under the glove box) doesn't get cold. The blower fan (under glove box) is spinning fine. The fan on the heat-exchanger (outside, on the right of the radiator) is turning too.

Got 2 cans of R134a-compatible gas and filled the system, same problem.

When the AC is turned on, the RPMs go higher (from about 700 to about 1200) and go to idle slowly. When it is turned off, the RPMs go high again (to about 1000), then drop to 700 slowly.

If I take two long wires from the relay that activates the compressor and put my ear just above the compressor (car is running at this time), and I short them, I don't hear any clicking sounds (as suggested by the service manual). I wonder which part should click and what happens when it clicks.

Since I got this car (2 years ago), the AC never worked.

I also have the Haynes manual and the original Honda manual. Tried everything there, no help.

Car is a Civic 97 EX automatic, 4-door.

Open for suggestions and experimenting :D

Thank you all for answers.

 

Hey man, wrong forum for the car. Here is the correct forum; good luck.

https://honda-tech.com/zeroforum/1