Just in from the cold -- with a heater problem! - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 01-17-2009, 09:14 AM
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Just in from the cold -- with a heater problem!

I have a 1999 528 (E39) with intermittent heat. The blower works great, but the heat seems to toggle on and off without reason. The car comes up to proper engine temp without problem. The dial between the air vents in the middle of the dash is set to max (red), and it still decides when to blow hot. Worried about having heat when it gets down to zero! Any ideas?
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#2 (permalink) Old 01-17-2009, 09:18 AM
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possible bad heater core
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#3 (permalink) Old 01-17-2009, 11:08 AM
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Originally Posted by David-inVa View Post
I have a 1999 528 (E39) with intermittent heat. The blower works great, but the heat seems to toggle on and off without reason. The car comes up to proper engine temp without problem. The dial between the air vents in the middle of the dash is set to max (red), and it still decides when to blow hot. Worried about having heat when it gets down to zero! Any ideas?
Hi, David & Welcome to the Werkz..... sounds like the Climate Control Unit is crapping out.... this is a common problem with the e36, e46, & e39's......check out the links below.....& BBA Reman. actually repairs your unit for a reasonable price....with guarantee

Welcome to bmw-climate-repair.co.uk

BMW Climate Control Repair

How to Send your part to BBA

johnny,

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#4 (permalink) Old 01-17-2009, 01:24 PM
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Also check your thermostat is not sticking.

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