Greg M Chapin , SC May 11, 2020 Not holding temperature I had to replace both the T-stat probe and the control board. I may have been able to only replace the control board, since the T-stat probe tested ok with my multi-meter, but I went ahead and replaced both since I did not have a way to test the T-stat at higher temps. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes