SOURCE: thermostat reading is 10 degrees higher than
No their is noadjustment, your temp sensor is going bad and will get to the point where the heater won't start because it will be reading to high to start the heater. This is a inexpensive part and is farley easy to replace. All the info you should need will be in your owners manuel. Good luck.
SOURCE: Pentair MasterTemp 400 Heater Will run fine for
This reminds me of some of the High temp sensors ive replaced. I would start with checking the pumps flow to the heater. Make sure there are no abstructions and at least 35 GPM (gallons per minute) running to the heater. If your flow is too low, you will trip the high limit sensor after a short while.
This could also mean you need to clean out the heat exchanger. When an exchanger gets dirty, it blocks the flow of water, slowing it down and "super heating" itdue to the water being in contact with the exchanger for too long. This will also trip the high limit and call for service.
If both the above items check out, contact me @ [email protected] and I will guide you further.
SOURCE: have pentair easy touch controls just installed
If the Easy Touch is reading the correct temperature, but the heater is not - you need to double check the temperature of the pool water with a standard pool thermometer.
Other things to consider:
1) The water is traveling too slowly through the heater. If the water is heating too quickly, then it will shut it off. If it takes a while for this to occur, then this would not be the issue.
2) Thermostat/thermistor is incorrectly reading the temperature of the water prematurely shutting the system down.
Make sure you really are checking the temperature of the water and matching this temperature up with one of the two readings that you are getting. Don't just take the word of the displays on either unit.
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