Carrier 50XT-A48 Defrost Sensor Board
The defrost sensor board controls if and when to commence the defrosting phase which aids to defrost your outdoor unit. The board depends on a specific sensor located somewhere by the condenser to determine when to initiate the defrosting cycle.
Some clues the AC defrost sensor board needs a replacement ASAP
- The main board might give out an error signal referring to a bad defrost board
- Defrost session refuses to run even though there is quite a bit frost on the external unit
- The HVAC system could cease to operate due to the fact of the frost blocking the flow of air
Feel free to download your manual for help.