A/c light won't come back on after shutoff and restart.

[mossyoaks]

My air conditioning system appears to work fine. On initial start up, all lights come on, fan blows correctly on each speed, compressor cuts on, etc.

But once the fan is cut off or iginition turned off, the a/c indicator light and compressor won't come back on immediately.

After the ignition has been shut off for at least 15 mins., the a/c system turns back on normally.

Fan blows on all settings as it should regardless of the a/c light being on or off.

Is this a microfilter issue, resistor issue or what?

Mossyoaks
95 525iT 175K BostonGreen, roof rails, OEM tow pkg.
95 525iT 125K AlpineIII, Tstars, roof rails
952

[mossyoaks]

Bentley's is pretty vaque on this one.
Any thoughts would be very welcomed.

Chip

[repenttokyo]

what is the duty cycle on our compressors?

[bmwrp8]

Bentley's is pretty vaque on this one.
Any thoughts would be very welcomed.

Chip

I have the exact same problem! but mine the light is on but does that compressor cut...had it for a year and i changed almost everything...compressor, evaporator, e.valve, r.drier, sword , AC brain or the blackbox , AC temp thermostat sensor still the same...now i just live with it... if ever you found your solution let me know..and i tried asking around no luck

[Fred/Houston]

My air conditioning system appears to work fine. On initial start up, all lights come on, fan blows correctly on each speed, compressor cuts on, etc.

But once the fan is cut off or iginition turned off, the a/c indicator light and compressor won't come back on immediately.

After the ignition has been shut off for at least 15 mins., the a/c system turns back on normally.

Fan blows on all settings as it should regardless of the a/c light being on or off.

Is this a microfilter issue, resistor issue or what?

Mossyoaks
95 525iT 175K BostonGreen, roof rails, OEM tow pkg.
95 525iT 125K AlpineIII, Tstars, roof rails
952

Mine started to do the same thing about a week ago.1st I smell musty air,then I realize it's not blowing cold air anymore. I try to shut it on or off but no luck.
Then I hear a flap open(or close) and I have cold air again.
It just happens when it wants to so I'm looking for a cure as well.
Fred/Houston

[Tiger]

What is your refrigerant pressure when running?

[Ferret]

What is your refrigerant pressure when running?

I was going to say...

Mine used to do something similar to this, and it eventually transpired the A/C gas pressure was approaching minimum tolerance...

Flip on the A/C and the low pressure side would drop out, causing strange behaviour in the controller... AC wouldnt restart after a shut-off.

Dont these systems have high pressure switches as well, to tell the controller that the system is overgassed?

[Tiger]

Yeah, it is called Hi/Lo switch... too low pressure, compressor off... too high, compressor off too.

[mossyoaks]

I haven't had the system pressure checked. Obviously, this is a common issue with our e34s!

I'll follow up later on how it all comes out.

Thanks!
Chip

Yeah, it is called Hi/Lo switch... too low pressure, compressor off... too high, compressor off too.

[mossyoaks]

I can't seem to locate where this hi/lo switch goes in Bentley's.

Anybody know?

I haven't had the system pressure checked. Obviously, this is a common issue with our e34s!

I'll follow up later on how it all comes out.

Thanks!
Chip