Lennox 23M22 Defrost Control THPU32HP7Y Is thermal paste required for Is thermal paste required for installation Does this unit include an internal restrictor and 26H47 boards This helps verify the functionality of the 24V AC reversing valve signal and ensures the outdoor fan cycles off correctly during the defrost sequence
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Lennox 23M22 Defrost Control THPU32HP7Y Is thermal paste required for