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vacuum switch

  1. Heil DC90 Furnace Vaccuum switch problem?

    I bought a house in Feb 2012 with a Heil DC90 furnace that worked great during the home inspection. After moving in, I realized that the furnace would kick on just fine and heat the house up ONCE but wouldn't light again until it sat OFF for at least 20-30 minutes. Through Feb and March, if I...