Westinghouse 917178a Defrost Control Board Heat Pump

Product Description

The WESTINGHOUSE 917178a is a defrost control board designed for residential split system heat pumps. This board manages the defrost cycle, monitoring conditions and initiating defrost sequences to maintain efficient heat pump operation during cold-weather conditions. Licensed HVAC technicians install this board as a direct replacement when the original defrost control has failed or is causing improper defrost cycling. The 917178a meets UL standards for both Canada and the United States, confirming it has been evaluated for safe use in residential HVAC applications.

This defrost control board is intended for use in residential split system heat pump installations. It is suited for applications where the defrost cycle needs to be restored or where the original board has been diagnosed as faulty. The board is specified for use on the JT4BE model series, making it a targeted replacement for technicians servicing that equipment in the field.

Key Features

• Controls defrost cycle operation in residential split system heat pumps
• UL listed for use in Canada and the United States
• Direct replacement for failed or malfunctioning defrost control boards
• Designed for use on the JT4BE residential split system heat pump series

Compatibility

Designed for use on the WESTINGHOUSE JT4BE residential split system heat pump.

Installation Notes

Installation should be performed by a licensed HVAC technician. Before servicing, disconnect and lock out all electrical power to the unit in accordance with local codes and NEC guidelines. Inspect all wiring connections for damage before reinstalling the board. Confirm defrost cycle operation after installation by running a full system test.

Technical Specifications

• Item Type: Defrost Control Board
• Application: Residential Split System Heat Pump
• Applicable Standard: UL (Canada and US)
• Compatible Model Series: JT4BE

Standard Information

• Brand: WESTINGHOUSE
• Manufacturer Part Number: 917178a