| Furnace Mystery solved! [message #294736] |
Sat, 30 January 2016 17:23  |
lance
Messages: 190
Registered: December 2004
Location: Vancouver, WA
Karma:
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Senior Member |
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The two year furnace mystery is solved! Yes! No one is happier than me. My knees hurt from trying to exorcise the ghost haunting my furnace.
The reason no one could diagnose the problem is because there were two issues.
The first issue was my new converter ground. The wire was too short to reach the aluminum body, so I used a sheet metal screw to a small pice of galvanized tin. Yeah, I know. What was I thinking? Not just the cheesy metal but the screw was loose!
The second simultaneous issue was an open, broken or somehow cut thermostat wire. It was intermittent.
I bought three feet of 4 gage wire and a nice ground lug, drilled a 1/4 inch hole in the aluminum frame and bolted that cable in place, replacing the short one. Then I ran twenty feet of new thermostat wire. I used to install security systems, so I learned how to fish behind walls and ceilings, something many of us GMC'ers come to learn. It took all day, but my furnace now runs like a champ.
Thanks to all who read and gave me clues. No one had the right answer, but new ideas and feedback kept me going. What a great group!
1974 Palm Beach
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