so here's the issue, I have an older Intertherm Model MGH-065A gas heater (furnace?), regardless of whether the ambient temperature dictates the need (70+), and the thermostat turned down to 50, the heater comes on, the only way to resolve this is to turn off the heater with the switch inside the enclosure. I would really like to not have to turn off the heater outright since we still get random cold nights. the thermostat in use is a Honeywell CT30A1005 I believe.
any suggestions on what/how to resolve this??
btw the thermostat is an non-mercury type unit, though I did make sure that is was level, I have also thoroughly cleaned both thermostat (wasn't really dirty at all) and the heater control box (removed cover) as well as the heater cabinet.
Intertherm Model MGH-065 random turn-on
If you can get your hands another a used working thermostat or a new cheap one, I would suggest trying that first just to eliminate the Thermostat. Do you ever here the Thermostat click when the heat randomly turns on? That's where I would start I've come across a lot strange problems with thermostats being the culprit.
2009 Skyline Sunwood Premier 14 x 80
Pick up a cheap heat only tstat and wire that into just the furnace. Eliminate the original tstat and all it's wiring. See what happens. Sounds like either a varmint chewed through a wire and when they touch the circuit completes turning on the heat or a screw was run through the original wire and now years later the problem shows itself.
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