My confort zone infered heater comes on for a few minutes then shuts down

fixya diyers are not comfort glow tech support and if you can not find help from the manufacturer how could we do it either

if unit runs ok for 3 to five minutes then completely shuts all power lamps off , then its hi temp limit sensor (safety) has been tripped , this usually goes out due to failure of main temp control , in point of fact contacts in temp switch literally weld them self's together and cant separate to allow heater to control temp

sounds like heater is getting too hot make sure if plummed with a bypass it is only open half way if no bypass make sure filters are clean if ok check manual bypass maybe spring is stuck open

does it come on after a few hours? or the next day? all heater have safety fuses in them that sense the temperature near the heating element and will shut down the power to the element to prevent fire. however these things fail some times on the side of caution. It is possible the air flow is not enough or the fuze is faulty

Does the heater continue to fire if you run it in service mode? If so it probably is an Aqualink issue. I'd call the factory on that one and they should be able to get a rep or authorized service company to see what's happening.

If the heater is also shutting off in service mode the problem may be in the bypass ***'y. This is not an uncommon issue with the Minimax. Too much water is bypassing the heater and the water that does get in is staying there too long, triggering the high limit switch which will shut down the heater.

Temperature blending doors might need a reset. Find the fuse and pull it for a few minutes. If that doesn't work you may need to replace the blend door actuator. Or your cooling system may be clogged.

Since the heater fires it sounds like it could be the bypass valve stuck open. The bypass valve allows some of the water to enter the heater, while the rest bypasses the heater and returns to the pool.


If the bypass is stuck open, or broken, it allows the vast majority of the water to bypass the heater and continue to the pool. The water that is in the heat exchanger will become too hot due to slow flow and activate the high limit switch, turning the heater off.


The bypass is located where the pipes attach to the heater and can be checked or replaced if needed fairly easily.

there is a cad cell that see's a flame or operates the shut down circuit. Try cleaning the cad cell.
Dennis

FYI...I have a customer that brought his Comfort Zone CZ2011C to me for service. It does exactly the same thing, just powers off after a few minutes of operation. I contacted the company and receive no help at all telling me that repair parts are unavailable. Really??? Absolutely the worst company I have ever dealt with in over 29 yrs of appliance repair....

Open following link for complete troubleshoot of electric water heater
http://waterheatertimer.org/How-to-troubleshoot-electric-water-heater.html