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- Thu Jan 13, 2011 8:23 pm
- Forum: Coleman Service & Repair
- Topic: 3400A812 Wont shut off
- Replies: 1
- Views: 1342
3400A812 Wont shut off
This problem just started tonight. When we came home we noticed the furnace running unusually long. I turned the thermostat down and it continued to run. I turned the thermostat all the way down to 50 degrees and it wont shut off. The only way to get it to shut off is to go to the fuse box and turn ...