ac compressor not engaging
 

Hi
I never had working AC.
I was told the aux fan was dead which it was.
Also the 50 amp fuse behind the other fuses was blown.
changed the fuse but it blew again.
I have just fitted a second hand fan and it spins up fine.
Now the problem is that the compressor does not engage.
I was wondering if there is a fuse for the compressor.
And i would like to know what voltage fires up the compressor
so that i can jump power to it.
Or does any body know what i could test to find out what could
be wrong.

Thank you in advance.

Dave king

I would bet your low on refrigerant. The low pressure switch isn’t allowing the compressor to engage. How mechanical are you? You could try jumping the trigger wire at the compressor (dunno if it’s pos or neg) and see if the compressor fires up, if it does and it doesn’t get cold, there’s your answer. If your not mechanical, take it in and have it looked at.

Have you run codes with a Foxwell or real BMW scanner? Why does it say the compressor is not engaging? I think it would be highly likely that the fan fuse was blown, preventing the compressor from running, AND you had a second problem keeping the compressor from running as well. A Foxwell would tell you exactly what the problem is.

The clearest thing you have here is that 50A fuse blowing. I would focus on that. Exactly when does it blow? Can you do some experiments where you unplug certain things and see if the fuse does not blow? Yes, you will need some fuses.

And yes, once you get that figured out, you might be low on refrigerant or some other issue may exist. But maybe not. You might have a simple short somewhere.

Hi
the fuse only blew because the fan was dead.
Fan spins as it should and fuse does not blow now.
Will check for gas today.

Thank you

Just put power to the compressor and it started spinning.
ac did not blow cold.

I pressed one of the valves on the ac line and gas came out.
so could the problem be low gas even though it released from the valve.


Thank you

Suggest you take it to a reputable shop to evacuate and recharge the system.

Yes it can be low and still release freon. Grab a can of refill from the auto parts store that comes with a gauge. Put it on and you will know right away if it's low. Be careful not to overfill.

:thumbup:

:iagree:

I agree also because you could have oil slugged your condenser too....

Don't ask how I know...[emoji24]

Sent from my SM-A730F using Tapatalk