contact634 Posted May 15 Report Posted May 15 My mastertemp 300 installed 2016/17 worked fine last year opened the pool up heater fired up no problems I shut it off next day I heard it firing and it was all by itself. I turned it off and it turned itself on again I cant turn the power off to just the heater so i turned the gas valve off so it wont fire. I understand the control board and key pad to be the problem OEM is $1000. ish here in canada there are aftermarket ones on amazon for FAR less has anyone tried these? Quote
contact634 Posted May 22 Author Report Posted May 22 well I ordered the knock off from amazon for $100.00 installed and its so far its working 100% Quote
contact634 Posted Tuesday at 01:24 AM Author Report Posted Tuesday at 01:24 AM been running this heater since board replaced with knock off and NO problems yet Quote
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