Quote:
Originally Posted by Shiny
Please forgive me but I can't resist...
You sure nobody swapped that ID plate? Those rivets don't look factory to me...
And yes, that thermostat looks like it was built like a tank. Why do you think it would lose 40 degrees calibration? Is the bimetallic coil corroded or was solder used as a mechanical connection and then creeped/relaxed or ??? If the calibration changed because the coil relaxed I'm not sure I'd be calling it a good design, but hey..
There's some serious nostalgia in that thing but geeeshhhh.. I'd say you are lucky the contacts in that switch are still working.
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I figure there was friction for where the swingarm pivoted on the centershaft, maybe dug a groove. Also the switch might have increased in Click pressure, just a wee. No corrosion but i could figure some fatigue or bimetal strain relief occured.
The system is holding Temp as usual 70 inside, 29 Outside. Temps to 180 then shuts the gas.
Cleaned-up the gauges; Temp gauge needle seems flakey, so would enjoy a replacement.
Here's a photo of the Furnaces: Coal (water and exhaust disabled) on left, Auger all there but not shown in photo. Natural gas on right..