I have been dealing with a strange A/C issue the past couple of weeks, and $1k later it still isn't fixed! Has anyone else seen this?
1. The pressure in the system is correct, there are no leaks.
2. The pressure sensor has been replaced by a part obtained from the dealer.
3. The IPDM has been upgraded to the new one (apparently the clutch relay is part of the IPDM itself, it doesn't have a replaceable relay, you have to replace the whole assembly). All fuses in the engine compartment and inside the cabin are good.
4. If you run power straight to the clutch the A/C runs cold all day long.
5. The computer is not throwing any codes. The HVAC diagnostic passes with no codes (the one where you put the ignition to on and hold pause).
6. The A/C works sometimes, then other times it just stops blowing cold. When this happens the clutch is not engaged. Sometimes restarting the car gets it to kick back on, or even letting it sit a while. Resetting the computer will also let it come back on. At some point it always shuts itself off and may/may not come back on until it feels like it. It seems like it usually doesn't want to work when its real hot outside (over 105), but this is just an observation that could be all by chance.
7. The blower always runs, it's just the air isn't cold at times (when the clutch isn't engaged obviously). The A/C shows that it is on even when the clutch isn't engaged (so I believe the car thinks it has the A/C on still?)
8. If it is working (clutch engaged) and you turn the A/C off, then try to turn it back on, it usually won't come on again...
Does anyone know any other parts/issues that would cause this behavior?
1. The pressure in the system is correct, there are no leaks.
2. The pressure sensor has been replaced by a part obtained from the dealer.
3. The IPDM has been upgraded to the new one (apparently the clutch relay is part of the IPDM itself, it doesn't have a replaceable relay, you have to replace the whole assembly). All fuses in the engine compartment and inside the cabin are good.
4. If you run power straight to the clutch the A/C runs cold all day long.
5. The computer is not throwing any codes. The HVAC diagnostic passes with no codes (the one where you put the ignition to on and hold pause).
6. The A/C works sometimes, then other times it just stops blowing cold. When this happens the clutch is not engaged. Sometimes restarting the car gets it to kick back on, or even letting it sit a while. Resetting the computer will also let it come back on. At some point it always shuts itself off and may/may not come back on until it feels like it. It seems like it usually doesn't want to work when its real hot outside (over 105), but this is just an observation that could be all by chance.
7. The blower always runs, it's just the air isn't cold at times (when the clutch isn't engaged obviously). The A/C shows that it is on even when the clutch isn't engaged (so I believe the car thinks it has the A/C on still?)
8. If it is working (clutch engaged) and you turn the A/C off, then try to turn it back on, it usually won't come on again...
Does anyone know any other parts/issues that would cause this behavior?