I recently brought back to life an old Jacuzzi that had sat for about two years. I only replaced the circuit board. After about two months of use I had the heater fail to shut off. The heater light was on so it appears the circuit board did not turn it off. First I assume that was caused by a failing temp probe. The spa temp reached about 130 before I noticed and shut it off. Then the PVC attached to the heater slowly melted and I lost most of the water. So it appears I have a second problem of the high temp cut off having failed.

Is it likely that the heater survived the ordeal and I can just replace the two sensors and repair the PVC? Or should I just buy a new heater assembly?

Replace sensors, repair pvc.

Be prepared to replace the heater ELEMENT. Best thing is to order both the sensors and element to save time.

Thanks. I'm pretty sure I saw the element in the SpaPartsNet store so it shouldn't be too hard. Depending on the cost I guess I might just get a pre-assembled unit with the high temp cut out already installed.