I read through some of the other posts on this issue and it seems like mine may be a little different.

My A/C works great when it works, not low on freon (checked low side only as I no longer have manifold gauges ), does not cycle on and off, my coolant temp and ambient temp seem to be reading fine, however still the A/C sometimes just doesn't work. Clutch doesn't even try to engage when it isn't working and locks right up when it is working.

My thoughts are A/C relay, or pressure switch? Anything else I could be missing?


P.S. I don't think this is related but my cruise control works only about 75% of the time, the key fob works about 95% of the time, the fob controlled trunk button does not work, my front speakers do not work, and the passenger airbag sensor thing is broken.

 

Alright so quick update. Removed the relay and ran a jumper wire. This made the clutch engage and the A/C work. Tried replacing the relay and still nothing.

 

Any problems with your temperature display not showing a reading?


It could be a bad coolant temperature sensor.

 

Coolant and ambient temp work fine always.

 

It could be 1 faulty relay switch, 2 blown fuse and last is worn out clutch compressor.

 

My 2008 5 speed has intermittent problems with the AC too. When my temperature gage does not give a temperature readout, my AC does not blow cold. When the temperature gauge works, AC blows nice and cold. Defrost same symptoms as AC.
It coded P0128, and so I replaced the temp sending unit, then the thermostat. Still workes sometimes, sometimes not.
Now my tachometer sometimes quits working and the engine misfires, stalled completely once.
Any ideas? I have had my ignition changed out under the recall a few months back.