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Thread: Helio-Matic 4000A Baulky Rheostat?

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    Join Date
    Apr 2014

    Helio-Matic 4000A Baulky Rheostat?

    Have older 90's model Helio-Matic 4000A controller , tracked my problem to valve not opening and closing properly to bad Rheostat( knob adjuster for temp.),can I get the rheostat separately or whole controller and will the newer 4000C work .

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    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Helio-Matic 4000A Baulky Rheostat?

    If you are handy with electronics, it is possible to fix the Rheostat, but I don't recommend trying unless you already have experience with soldering.
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