Climate controls will not turn on

[BavariaTexan]

This sounds like a permanent fix for Texas.

Originally Posted by CTSportX5

Short term update: Managed to unplug the aux water pump from the top. What a PAIN. Had to undo the pwr steering resi, exp tank and the metal bracket that holds the 2 firm. Harness was on the BOTTOM of the pump with a stupid spring clip that wouldnt budget. I tried in vain for a half hour trying to unclip it blindly. In the end I had to contort it upwards, bending the hoses (I know not optimal) but I got it off using a screwdriver without any residual breakage.

The wires looked fine, no fraying from what I can see. I took a 10 minute drive hitting every button possible on the climate control panel repeatedly. Heat all the way up, A/C all the way down, highway speeds, standing still...you get the picture. So far fuse 48 is staying strong, no popage. Taking it to work tomorrow for the real test, fingers crossed...

Side note in case anyone is wondering, the aux water pump makes a noticable difference in the heat temp at low RPM. At a red light with heat on 91F I can feel the air cool considerably. This would suck with winter temps outside.

[TerminatorX5]

i can't check WDS while at work but i wonder if the F48 is affiliated with auxilliary water pump or not... interesting....

[CTSportX5]

Based on what I have researched it is. The 2 high draw components on F48 are the dual water valves and the aux wp. If you could confirm that would be great though. I'm basing this knowledge off a bimmerfest post and a youtube video. Not exactly fool proof.

[Smurfwarrior]

Can you unplug both (either) high draw components without damaging the vehicle?