5-Series (E12,E28, E34, E39, E60)Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)
For a little while now, I am only getting heat out of the drivers side of my E34 (1994 525i). The drivers side heat works fine, but no matter what temp setting the passenger side is set to, it still blows cold air. I took off the temp knob to see if the it was accuratly turning, and it is. I do have the hot/cold controller set to hot.
Someone please help me out here, it's cold in buffalo!
I have had the EXACT same problem on my 5...I ended up having to replace the heater pump and that did the trick. Once removed, I saw that the pump had completely failed on one side and that the gaskets were completely rotted out. Check your pump and see if it needs to be replaced, mine cost about $160 to R&R.
Inspect your heater valve which looks like this...
It should be on the driver's side near the back of the engine compartment and will have a lot of tubing going into it...Remove it (dont forget to clamp off the hoses so you dont lose all your coolant) and inspect. Bavarian Auto sells a new one for 139.95 (64 11 8 391 417) and this is a pretty easy DIY.
A BMW center running about $100 per hour, will probably charge an hour of labor. However this is a very simple fix. All you have to do is unplug the wiring to it, use clamps on the hoses, take out the valve, put in the new and replace the hoses and wiring plug. But I can understand if you want to be absolutely sure by going to a pro. This is something that any mechanic can do...
Warm thanks to Matt! I was also having the "heat only out of the driver's side" problem (much to the distress of my much chilled wife on the passenger side). After consulting this forum I located my heater valve, gave the right side a sharp "thwack" with my genuine BMW/HEYCO reversible blade screwdriver, and am now enjoying a fully heated cabin. If the problem recurs, I plan to remove the valve and clean it. I would think carb cleaner would do the trick (though I don't know what's inside).
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