Volvo RWD 444-544 Forum

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could someone explain the heater controls to me? 444-544 1959

Hi all - I have a 59 544, the heater controls are misbehaving and I'm burning up!

There's a cable that runs from the bottom lever to the flapper that directs the heat to defrost or heat (near heater core).

From this image, I think that's backwards:
http://www.swedishtreasures.com/124.jpg

The cable that runs from the top lever goes to a metal housing near the gas pedal, looks like there's a heater valve in there?

I'm confused, since it looks like the heater hoses go to the core in the engine bay. How does water get to the valve?

A schematic would be greatly appreciated. I believe the control valve is just stuck, how is it accessed for servicing? The only access point I see is a 1" hole where the cable goes in.

Thanks!








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    could someone explain the heater controls to me? 444-544 1959

    Hello,

    The heater valve is under the metal housing you described.

    The metal housing and IIRC the heater valve are both retained by the same 2 screws, 1 on top and 1 on the bottom.

    Carefully remove the housing as there should be a capillary tube inside that is attached to the heater valve and you do not want to damage it.

    You might have to slide the housing back over the cable and then reinstall the screws to hold the heater valve in place while you are trying to free up the lever.

    It would not be a surprise that once you do get the lever to move, that the heater valve might start to leak.

    There is a repair kit and if necessary, new heater valves are still available.
    --
    Eric
    Hi Performance Automotive Service (formerly OVO or Old Volvos Only)
    Torrance, CA 90502








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      could someone explain the heater controls to me? 444-544 1959

      Thanks very much for the reply. Took a look and "now I get it".... always wondered what the two pipes coming from the firewall with nothing attached were for.

      I bet the PO disconnected it due to needing rebuild or replacement.

      Thanks again, very helpful!







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