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Furnace joe 5-15-14  
I have an 8500iii hydroflame furnace.The furnace works fine but only runs one cycle and blower continues to run and doesnt shut off unless i reset it at the thermostat.I also noticed when it does this the contacts in the thermostat does not open.But get this,I took the cover off the thermostat just to see what happens inside of it.When i did this the contacts did open and the blower shut off but this doesnt always happen with the cover off.That is how i know that when the blower stays on the contacts stays closed.
Re: furnace BUBBA THE BUS TECH 5-16-14  
Your furnace "trips" the high limit switch.

Check the following:
Blocked or restricded return air
Blocked or closed damper on a heat duct. Any single damper shut or throw rug over a duct will cause this.

Change the High Limit switch.

Good Luck
Re: furnace Elizabeth Daniel and Mike Enright 10-6-14  
Where is the furnace on an 87 tiffin allegro? We are newbies. We are Florida and it is unseasonably cold.
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