True 800315 - 37T21 Defrost Termination Switch by Therm-O-Disc

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90 Day Manufacturer Warranty! True warranties this part for 90 days from date of purchase to be free from material defects.


7.75 lbs
16 in
10 in
6 in


Defrost termination switches like the True 800315 by Therm-O-Disc (37T21) are an important part of the defrost system of your True unit. The defrost termination switch is mounted on the evaporator coil and controls the defrost cycle in response to the temperature of the coils. When the coils are cold the termination switch is closed. When the unit begins the defrost cycle, the coils are warmed which melts the ice on the coils. When a set temperature is reached, the defrost termination switch is opened, terminating the defrost cycle. The True 800315 defrost termination switch by Therm-O-Disc (37T21) features two 17" long wires, one red and one black, that have blue connectors on the ends.

  • True Part Number: 800315
  • Manufacturer: Therm-O-Disc
  • Manufacturer Model Number: 37T21
  • Wire Configuration: 2 Wires with Connectors
  • Wire Length: 17" long
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