Heater always blowing warm

[Rory525]

Ok I took a hammer to the valves today and the drivers side one seems to work properly now, I can hear it clicking away. I can get fully cold air from the drivers vent now which I couldnt before.

Passenger side one seems to be knackered though, but its stuck on almost cold so its not really a problem.

Hope they stay working so I dont have to replace the valves.

QUESTION - does a 1991 525i M50 have an Aux water pump ? I couldnt see any sign of it. Maybe it was only the 535i ? Or im blind

[JonE]

Should have the aux pump, check the link, http://www.bmwe34.net/e34main/Mainte...eaterValve.htm
look there at the first picture that shows the valve assembly attached to the aux. pump. They come out together if you're refurbing this item. Then you separate the two components. Check the wiring to the pump, this could be the problem, mine was completely corroded at the pump and needed replacement. Perhaps you will be luckier?
JonE

[mistertonylee]

try flushing the heater valve. there is a website out there (don't remember where, sorry) with instructions and pictures and everything!!

probably not the heater sword thingy, and the coolant leak would cause your heat to be cool, not your a/c to be warm.


Tony