Replacing a residential heat pump defrost control board typically costs between two hundred and five hundred dollars when performed by a professional HVAC technician, with parts alone generally ranging from one thousand to two hundred and fifty dollars depending on the equipment brand and model complexity. The remaining expense covers diagnostic labor, travel fees, and technician expertise required to safely wire and configure the new board. Universal replacement defrost boards are often more affordable, whereas proprietary OEM boards designed for high-end inverter heat pumps command higher prices. It is vital to ensure that the replacement board matches your exact system voltage and wiring configuration. You can verify that the repair was successful by observing a complete heating and defrost cycle where the board accurately times out and returns the heat pump to normal heating operation.
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