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Re: Heater Problem (archive)
[ Follow Ups ] [ 6-series (E24) Message Board ] [ Msg. Board FAQ ]
Posted by Jeff on January 10, 2000 at 16:49:21:

In Reply to: Re: Heater Problem posted by DonM on January 03, 2000 at 15:15:33:

: : The heater blows hot air while idling. Once I start accelerating, it starts blowing cold. Would this be the thermostat.

: : Any help appreciated.

: : 85 635
: : 80 635


: The problem is your heater valve (located on the firewall right above the brake cylinder). When the engine speed increases, the water pressure increases and if the heater valve is no longer working, the higher pressure will force the valve shut. Therefore you get heat when the engine idles but not when it is running.

: It's an easy repair. You can either replace the valve or there is a rebuild kit available that replaces all of the internal parts of the valve that is cheaper... Your choice.

That was the fix, thanks for the help.

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