Sta Rite Pool & Spa - Popular Questions, Answers, Tips & Manuals

Question edited for clarity. Question moved to correct category. There is a video in the link that promises the codes, but it might be clickbait and an empty promise. https://www.google.com/search?q=Sta-Rite+400+code+337 ..

https://www.youtube.com/watch?v=V45_D0l2s5A https://www.youtube.com/watch?v=e8RMfw4nZos https://www.troublefreepool.com/threads/max-e-therm-400-service-system-light-on.52433/

Try changing the Thermal Regulator. You could just remove the T/R as a test and replace as necessary.

Check the control wire that might be connected to the control fuse. If that wire is open the unit will only cycle thru the board information and the sit dormant until the control is called for.

That unit has specific instructions for water temp operation at 60 or lower. The display also can show diagnostic info and there are indicator lights for diagnostics. Do you have any of those showing any errors? If the temp is jumping from 91 to 104 instantly and then back down to 91 instantly, this is a wiring issue or a bad thermistor. Check the wiring and use an OHM meter to check the thermistor, it should have a chart that shows a resistance at a certain temp. There is a limit switch right next to the thermistor, Make sure it is not shorting out with that.

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You should not have any gas at the union until the heater tries to fire. The Air Flow Switch circuit should have 24 volts at the switch and should be tested. If the voltage is not correct then more trouble shooting will need to be done.

Have any mice been inside the heater? If so check the burner. Some times the mice will nest inside the burner and it will need to be cleaned.

Check your stack flu sensor. Sensor can not be jumped. As soon as the heater fires hold down the pool or spa button until the stack temp appears. At 500 degrees the heater will shut off giving a code. The heater should not restart. I would also check for wire damage based on the description of your issue and the board restarting on it own. You may also have damage to the "user interface board" , hard to say with out on site trouble shooting.

The age and over all condition of the heater would help. Try removing the Thermal Reg and see if it smooths out. If the heater responds, replace the Thermal Reg with a new one.

Replace the Thermal Reg and the temp sensor. Thermal Reg will cause the noise and the Temp sensor will cause the 118.

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.

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.

Yes. 99% chance you will need an exchanger core.

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

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

It is a software code displayed on start up. Is the heater having an issue?

first thing I would check is you should check for spark next the fuel filter, take it off shake it and dump out the contents if its dirty, this could be the problem, also you can place your ear against the car and cycle the ignition switch you should hear a buzz, this is the fuel pump running, it only runs for about 5 seconds, unless the car is running.

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.

Check for voltage and current on the igniter. Might need to replace the igniter.