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Thread: Heater-valve, or something else?

  1. #1
    Join Date
    Jun 2004
    Location
    East of England
    Posts
    35

    Default Heater-valve, or something else?

    Hallo!

    On my '89 525iM, The face level vents always blow cold air. Now, it's done this since I got the car and I've always kinda assumed it was the heater-valve.

    I got all tooled up, ready to go and get one to overhaul out of a wrecker when it struck me, would this problem actually be the heater valve, or something else? Both passenger and driver heater controls do adjust the temperature of the other two sets of vents (footwell and demister), but the mid-level ones always blow cold (including the vents in the doorcards).

    Is this a valve problem, or something more annoying buried in the vent system? The two face vents in the top of the dash don't have the temp. wheel between them (something to do with not having aircon I suppose), and the large vent on top of the dash also blows cold all the time.

    Cheers!

  2. #2
    Join Date
    Jan 2004
    Location
    Benneton (United Colors of)
    Posts
    3,067

    Default

    i think that it usually mixes warm if the hcv is leaking or faulty, though your situation could be different. here's sean and johan's explanation

    http://bmwe32.student.utwente.nl/joh...ts_v1.1-1.html

    sounds like its the problem you claim to have.

    Quote Originally Posted by StuartB
    Hallo!

    On my '89 525iM, The face level vents always blow cold air. Now, it's done this since I got the car and I've always kinda assumed it was the heater-valve.

    I got all tooled up, ready to go and get one to overhaul out of a wrecker when it struck me, would this problem actually be the heater valve, or something else? Both passenger and driver heater controls do adjust the temperature of the other two sets of vents (footwell and demister), but the mid-level ones always blow cold (including the vents in the doorcards).

    Is this a valve problem, or something more annoying buried in the vent system? The two face vents in the top of the dash don't have the temp. wheel between them (something to do with not having aircon I suppose), and the large vent on top of the dash also blows cold all the time.

    Cheers!
    "..Torchinski v. Peterson that it is legal to carry a concealed weapon, so long the weapon is totally slick like a huge ass machine gun that you carry under a trench coat, like in the Matrix."


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