Pentair MasterTemp 400 cutout problem
I'm sure this has been answered a bunch of times here before so forgive me -- I did a search but did not turn up something specifically for this problem.
I have a 1 year old heater that only tonight started heating, then would cut out, light the service heater light, run a while more, then relight the burner.
All the usual suspects like not enough flow, temp setting below current temperature etc. were okay. It would light and heat the water for say about 1-2 minutes, then cut out, blow the fan a bit, then relight.
Any tips on what might be wrong? Have to get my pool builder out here to take a look, but wanted to see what the advice of the forum might be.