Originally Posted by davidsongreg
I just took the heater apart again including removing blowers. I blew everything out, inspected burner element, and put it all back together. Still overheating 😡. Seem to be getting good air flow. I'll try replacing orifice next. I'm at a loss as to what else to do
I would call Airxcel first. Try to talk to a service guy. Derating your BTU will not repair the problem. Has it ever worked that you know of? ASk Airxcel what the temp of the limit is, you stated it cuts out at 175 degrees? You have checked the regulator and it is set at 11" correct? With all you have done already, it might be time to take it in to a service company that can put some meters on it and find the problem. Hate to say that, but your starting to just change parts until you find the right one. The wording seems to get good air flow is tough to measure unless you have a DC amp meter and read the amps it pulling at FLA. I admire all you have tried over and over again but somethings you just have to have the right equipment to measure things. Good Luck, but I would talk to Airxcel and take it to a dealer....