Hot Water Heater Just stopped working
Ok, so I am not what you would consider a newbie as I have been RVing in one form or another for about 40 years. I often do my own troubleshooting and repair for all things mechanical. I have even cha...
Forum Discussion
Old-Biscuit wrote:
thermal fuse blow when exposed to 190*F.....flame/excessive heat blow back from combustion chamber
T-stat has NOTHING to do with this.
Flame sputtering......
gas flow/air mixing is not in balance
Remove burner tube.......clean with bottle brush
Remove orifice....soak in alcohol and then blow dry.....very low pressure (just pucker up and blow on it) NO poking things thru it!!
Run a wire thru combustion chamber and out exhaust... tie a rag to wire and pull back thru 'U' tube\
Reassemble.
Install new thermal fuse
Fire it up...adjust air shutter so flame is Strong, BLUE and slight roar
DONE..hot water (t-stat will shut down when temp reaches 140*F)
Yep, did most all of that. Turns out that the gas nozzle and orifice had some calcium deposit that was retarding the gas flow. I suspect that some water that came out of the Pressure relieve value while with the dealer may have been the source of the calcium. In any case, I removed and cleand the orifice and adjusted the air shutter to the recommended 1/4 inch open, and viola, a perfect flame.
I only hope this resolves why my TC blew and I have spares now.
Thanks!
