97 540i, Heater On Driver Side, Not Working - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 12-15-2004, 08:48 AM
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Smile

Ok, another fun problem on the "now beginning to give me an ulcer" 97 540ia. This morning, for probably the 10th time, the heater will work perfectly on the passenger side, while im freezing my A$$ off from the driver's seat. Bringing the temp on the drivers side actually will increase the air temp....has anyone else had this problem? The heat on the passenger side is fire hot, but maybe 75* tops on the drivers...

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#2 (permalink) Old 01-13-2005, 08:55 AM
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Happened again today.....any ideas?
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#3 (permalink) Old 01-17-2005, 10:36 AM
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Today I had your same problem on a 1998 528i. Just turned around, I get heat on the driver's side while freezing air blows on the passenger side. Bad heater valve?
If you have fixed your problem, please let me know how.

Dan
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#4 (permalink) Old 01-17-2005, 01:53 PM
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Maybe hot water valve is sticking.

Link from e38.org (for an e38 but similar)

DT




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#5 (permalink) Old 01-17-2005, 08:45 PM
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bad heater valve.
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#6 (permalink) Old 03-11-2005, 12:16 PM
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Just a follow up...
You were all right....A bad heater valve and $200 later, my heat works.

Thanks guys!
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#7 (permalink) Old 03-13-2005, 10:41 PM
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My heating problem is fixed. It was a leaking coolant and I had the thermostat and housing replaced. Heat is good......

Dan
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#8 (permalink) Old 03-14-2005, 08:59 PM
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Son of a Bi!$#

Today, just 2 days after the heater pump is replaced...what happens again? No heat on the driver's side. (which would switch to heat on drivers and cold on passenger) I went by BMW and they've scheduled me in for ANOTHER appointment....I'm close to just buying a propane torch and lighting it in the car....Any other suggestions as to why this is happening???
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#9 (permalink) Old 04-04-2005, 10:59 AM
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PROBLEM FIXED:
BMW Faxed the the following...

CUSTOMER FEELS HOT AIR ON ONE SIDE AND COLD AIR ON OTHER
BOTH SIDES SET ON SAME TEMP. FULL AUTO.
SEE HISTORY
HEATER HOSES HAD BEEN CHANGED ELSEWHERE AND WERE REVERSED AT THE FIREWALL.
(WATER VALVE CONTROL WAS REVERSED AND UNABLE TO
RESPOND CORRECTLY TO HEATER SENSOR INPUTS)
CHECK IHKA OPERATION. CHECK FAULTS. NONE STORED.
CORRECT HEATER HOSE POSITION AT FIREWALL.

TOTAL INVOICE 0.00

I'm just glad that they've fixed it....now that its 75* outside....
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