I have a 2003 manual Toyota Yaris with a very strange A/C problem, which got me and the A/C shop baffled. History:
- Since I bought the car 8 years ago, it had a weird problem where the A/C compressor would not start working when starting the car after it had been parked in the sun for a few hours. Only after some 5 minutes it would suddenly kick in and start cooling.
- Recently, it also started cooling poorly (mostly on low RPMs), and the shop said the compressor is dead and needs replacing.
So, they replaced it with a brand new compressor. Both problems are now gone, but instead an even weirder and more annoying problem came up:
- Whenever I reach a speed of ~50 Km/h and go over ~2500 RPM, the compressor would disengage and stop cooling completely.
- This is not a problem with the TPS sensor, as releasing the gas pedal at high speed would not cause it start cooling again
- If I shift out of gear at high speed and let the RPM fall to idle, it will start cooling even if still at high speed
- I thought it might be a high coolant pressure problem, but just hitting the gas while parking in neutral does NOT cause the problem to appear. It will cool perfectly at neutral on 2500-3500 RPM. This only happens when the car is above some speed.
Any ideas? I can't even think what could cause this weird problem...