Question about Pentair MASTER TEMP HEATER 400 000 BTU NG LOW NOX HD EXCHANGER
Is it reading 126 all the time or only when you first start it up? will the fan run?
Posted on May 03, 2017
Definitely bad thermistor Pentair reps have seen this happen a lot. Lick finger and touch the two contacts where the thermistor plugs in it should fire up if it's a bad thermistor. If you do an ohm reading you'll find that the ohms do not correlate with the temperature that's displayed. I just trouble shot one and I'm getting 51.2 ohms which equates to 10 - 20 degrees Fahrenheit which is obviously not what is being displayed because it's 126 which is a common number that's displayed when a thermistor is not reading properly
Posted on Apr 21, 2017
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Posted on Jan 02, 2017
SOURCE: Pump problems?
Their can be a number of things.. Is the pump priming. Hopefully it did prime. what usually happens after running for awhile, with no cool water coming in. The water inside the pump basket starts to heat up, then the tubing turns to brownish on the input side of pump and exhaust side. (you could have air leaking in throught the input side, which could result in the pump never priming) Or if it is priming and no pressure (can mean your empellar is clogged up)
Posted on Mar 11, 2009
Sounds like the controller is the problem. This is the circuit board that has the display and controls on it. You can swing that panel open and try tapping on the white plastic cover the controller is under that. This might get the fan relay to release but you will have to replace the controller it will stick again
Posted on Jun 23, 2009
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