Heater produces heat only at 80.
When I turn on my heater, there is a strange sound. Heat is only emitted at 80. When the heat is turned down to 70, nothing but cold comes out.
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Sounds like you need to replace the air blend motor. If so, the sound you hear is the air blend motor trying to move to blend the right amount of hot and cold air but isn't moving. Normally sounds like a series of loud clicks, but not always.
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