Part Number: 621-83-550L (also replaces 47-21776-06 and 621-550). • Application: Residential Heat Pump Defrost Control. • Condition: Used, professionally pulled from a working system. • Tested: Verified to be in working order at the time of removal. • Compatibility: Fits various Rheem and Ruud central heat pump models. • Shipping: Ships fast via USPS Priority Mail in protective anti-static packaging.
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