20 Most Recent Sta Rite Sta-Rite Max-E-Therm High Effiency - Propane Heater - 333,000 BTU - Page 7 Questions & Answers

They are typically set to function at the correct flow rate, there is a small adjustment that can be made but it is not recommended. If your pswitch is having a problem, simply replace it.

I would replace the user interface board. I am assuming you have a Maxithurm heater. The thermister is sending info to the temp comtrol on the user interface. A model would help me to be more accurate.

Check the control fuse in the metal box inside the heater. Also make sure you have power to the heater, if heater is connected to an automation system make sure it is calling for heat. Make sure the fireman switch is in tact.

Try removing the Thermal regulator. also make sure you have adequate water flow thru the heater. If the heater seems to run OK with the Thermal Reg removed then order a new one. Pentair / Sta-Rite 77707-0010 Thermal Regulator Kit for MasterTemp / Max-E-Therm

Not sure you should do this, what are the deposits you are trying to clean off? If they are hard deposits like minerals then medium blasting with a material like ground walnut shells will clean it up.

water is filled in the body of the pump to prime it fill the filter housing if that is part of the pump make sure that there is no open pipes /hoses or air leaks on the suction side of the pump and that includes any vacuum machine hoses floating on the water surface