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-   -   Climate Control Broken? (https://xoutpost.com/bmw-sav-forums/x5-e53-forum/109461-climate-control-broken.html)

Bmwtvboy 12-15-2018 01:14 PM

Climate Control Broken?
 
How many of you had to replace your climate control center piece when you started blowing the 7.5 amp fuse? At my wits end.
Issue: Checked out a/c and it worked great, ice cold no issues running it straight out at 60 degrees. It's FL after all. Then when the weather cooled down an attempt to raise the temp up to 76 blew four fuses in a row. Now I have hot air only. I disconnected the unit.
I replaced the dual water heater valve with new one. Old one jammed up, so I figured that was the electrical issue.
I connect the c.c in sections, and as soon as I connect the power source and try to change the temp, poof, blows the 7.5 amp fuse.
I also cleaned the c.c. unit before connecting.
What am I missing? Is this a worthless c.c unit? Oddly, the rear fan console blows with the disconnected c.c. unit and none of the dash fan/air blows. Weird.
Thanks for your assistance. :dunno:

Gregory891 12-15-2018 01:19 PM

Are your controls manual (knobs that you rotate) or automatic (digital display)? If automatic and given the age of the car and no fan blowing symptoms - it might be a VERY good idea to replace the final stage resistor (if you have automatic controls) - use a genuine part (Best) or Behr/Valeo, anything else doesn't last.

Bmwtvboy 12-15-2018 01:57 PM

Sorry, it's the dual automatic climate control panel. At about 150K miles I did replace the FSR, but at that time I did have the classic fan blower fluctuation issues. I will get one to replace it. I also have to test all my leads to the unit. Thanks man.

andrewwynn 12-15-2018 02:30 PM

A good scanner can run each component separately. Eg blower at 50%, each flap motor (feet/dash/defrost). I would suspect the porcupine or the part you replaced (or wiring to it).

If only blows the fuse when demanding heat the logical defect is the hot water valve. Unplug the power to that and see if the fuse still blows (or measure Ω to it)

Bmwtvboy 12-17-2018 03:25 PM

That is a great idea. But, it still blew the fuse as soon as I connected the three line main power source. I need to do some electric diagnostic. New to me, so I'll tread carefully. Thanks again.


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