[Trainer]

Chester,

Both Roger and I will be at Spearfish. I will be there all week to have lots of fun and visits. Roger and his vast part supply will be staying in Sturgis and will visit one or more days. I can assist in getting parts during the week we are there.

Seems your system is operating fine. I do not worry too much about the temp readings because calibration of the sensor varies. But I do worry if the high limit trips. Then I want to know did the temp get too high (control thermostat failed closed) or did the high limit trip early (bad high limit thermostat). A measurement with a contact probe vs IR gun is what Roger and I use to sort it out.

The normal failure mode of the thermostat is fail open.

I do not understand your question about which thermostat to use to measure the temp of your tank. Measure the metal surface around the thermostats that are attached to the outer surface of the tank.

If you want to know which thermostat is 12 vdc or 120 vdc, see me in Spearfish or e-mail me with your phone when you can look at the thermostats and I will be happy to help you sort them out.

Chester, You posted while I was writing and I think the IR gun is not as accurate as a contact probe or the temp sensor in the Newell installed heater that is in the tank. So Please do not worry.