Gas furnace blowing cold air


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Old 01-22-13, 06:37 PM
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Gas furnace blowing cold air

Gas furnace blowing cold air gas furnace is blowing cold air.
I turn it off for about ten mins. Then turn it back on to heat not auto setting on the thermostat. Thermostat may say 60 degrees when I turn it to heat it says 73. Heat comes on and I cab hear it turn on. Warm air starts coming out of vents. Then anywhere from 10mins to an hour later it starts blowing cold air and I turn it off. How can I correct this. It is really cold. Happens mostly at night and when the temps outside drop down low.
Honeywell thermostat RTH111. Is there something wrong w the thermostat?
Any help is appreciated thanks!
 
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Old 01-22-13, 06:42 PM
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The manual for the thermostat is at:

https://customer.honeywell.com/resou...69-2060EFS.pdf


Read sextion 2.4 and see if you have the thermostat properly installed to operate the furnace.
 
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Old 01-22-13, 06:43 PM
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You would have to go down and tell us what the furnace is doing.
A make and model number of the furnace is a big help too.
Natural gas or propane ?
The thermostat is probably ok.
 

Last edited by PJmax; 01-22-13 at 07:50 PM. Reason: spelling correction
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Old 01-22-13, 07:07 PM
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Thanks On the thermostat how do I know if the HG jumper is correctly set? I know I have to set this correctly since I have gas heat. There is a plastic piece that goes over two of the three prongs. Should I leave the prong exposed that is closest to HG? Thanks!
 
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Old 01-22-13, 07:18 PM
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[ATTACH=CONFIG]8237[/ATTACH]

Pic of back of thermostat I found it like this prongs close to HG are covered by plastic piece I'm guessing this is wrong?
 
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