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Tripp Lite SRXCOOL12K Defrost Sensor Board

The defrost sensor control board determines when to initiate the defrosting phase if necessary, to get rid of the frost that collects on the outdoor unit. It is relayed information from a specific sensor that can be found near the condenser, in order to ascertain when to initiate the defrosting cycle.

Clues of a weakening defrost sensor board

Check eBay to see if your defrost sensor board is in stock!
If you decide on picking up or ordering any Tripp Lite SRXCOOL12K replacement part, do your due diligence and cross-check the correct model as well as make a visual inspection so that you are positive that the correct replacement defrost sensor board is the one being purchased. There is no need to install the replacement part alone. Hire someone with experience in your community to do the job for you.
Feel free to download your manual for help.
Check eBay for your defrost sensor board!