When my AH did this it was a stir pump failure. Ordered a new HD stir pump from Roger Berke and that fixed the problem. If you have a digital thremocouple you can check the water temp into and exiting the stir pump. My stir pump motor ran but the pump impeller had died. Also, if you have the Honeywell mixing valve, they can be disassembled and cleaned with CLR. Did mine now it works great.
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Bob Retired Army Traveling alone now, had to put Charlie the Beagle down :(.
2008 Camelot 40 PDQ 4 slides ISL400 towing a 2020 1500 GMC Sierra Denali 4x4 Crewcab
Western MT in summer, AZ, NV in winter
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