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Defrost Thermostat Relocation for Single Row 7mm Heat Pump Coils

Defrost Thermostat Relocation for Single Row 7mm Heat Pump Coils

by HVAC Distributors

Goodman has released Service Bulletin SR – 076 regarding the location of the defrost thermostat on select Amana, Goodman, and GMC heat pumps.

From Goodman:

In certain applications the defrost thermostat may not be installed in the optimal location for complete defrosting of the outdoor coil. If you are experiencing incomplete defrost, we recommend relocating the defrost thermostat from the lowest U-bend to the U-bend just beneath the bottom-most flowrator leg (approximately the third U-bend from the bottom of the coil; Illustrated below). This adjustment will allow the unit to completely defrost the coil. Listed below are the models that are potentially impacted by the coil thermostat location.



Diagram for new placement of defrost sensor.

If you are experiencing incomplete defrosts, the defrost sensor will need to be relocated as shown in the illustration to the right.

Production changes were implemented on February 2, 2019. Any units with a serial of 1902 or later have the defrost thermostat in the correct location.

For installed units that require the defrost sensor relocation, Goodman will provide labor at the servicers Class “A” labor rate. Labor will be provided for 5 years from date of installation.

The affected serial numbers range from 1501-1901.

Claims must be filed on Warranty Express as an Authorization type claim, using Authorization Code number 8797. The claim for labor should be filed using the Dealer’s account number.

Please contact the Warranty Department if you need assistance with this process. The claim will be paid upon review by the Warranty Department. Warranty Claims will be approved for equipment that is still covered under the terms of Standard Warranty.

If you have questions about this bulletin, HVAC Distributors customers can reach out to our Technical Service department at 800.228.4822 x5.