1984 528e a/c not starting

[Ralph Fickett]

I have a 528e that will not allow the a/c compressor to start when i push in the ac control on the dash. The inside cooling fan starts but the compressor will not activate it clutch.
If i jump it out the compressor runs fine and it blows good cold air.
We check the a/c charge and it looks good.

Can anyone tell me if there are other safties that i maybe over looking?

[jeffreyb4me]

okay, ready? power comes from the A/C button through the Evaporator Temp. Regulator [inside the car on the L/S of the 'heater box'], [5 wire connector]. Power in is the green/yellow wire. Power out of it to the HIgh Press. Switch is the black......black/white wire. From the High Press. Switch on the rec/dryer it goes to the Compressor Clutch. Check for B+ @ the High Pr. Swt. 1st with the system on. IF 0 volts, go to the Evap. Temp Reg. checking power in then power out. there's a core temp sensor involved but the usual failure is the contacts of the Evap. Temp. Reg...have fun ! !

[csieminski]

Everyone using this forum ought to make regular payments to you in exchange for your professional background and expertise!!

[jeffreyb4me]

YES ! please make your checks payable to my
"he wants to take a world tour fund"
thanks csieminski.......................................j b.

[csieminski]

I'll send mine tomorrow--$4.00--that's all I can afford right now!

[jeffreyb4me]

Europe, here I come !.....................................jb.

[csieminski]

If you could get $4 from every AF member, then...that would be different! Seriously, your advice is worth a lot of $$$, even if only through saving other BMW enthusiasts a ton of money.