Bad control Board?

johns6

Member
Jul 2, 2014
15
round top, texas
My Pentair Mastertemp 400 runs for a few minutes then goes to E01 error which is Thermister error, and then service heater light comes on. I replaced the thermistor but the problem continues. Spoke to Pentair customer service and they said most likely control board is bad. So I ordered an new control board from an online pool supply company and after installation I get nothing, no LED's etc. Seems strange but could I have been shipped a new (defective) in the box board? By the way electronic boards are not returnable.
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
24,070
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
Did you reinstall your original control board to check that you did not mess up the wiring?
 

johns6

Member
Jul 2, 2014
15
round top, texas
Did you reinstall your original control board to check that you did not mess up the wiring?
Yes , old board worked just like when I took it out. Heater comes on shows temp at 1 degree, and runs about 5 minutes then goes to E01 and service heater light comes on, no other error lights.
 
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