furanace won't kick on automatically

36inchflange · 10-19-2008, 09:40 PM

my 22 year old heil furnace will run fine if i manually press the up button on the programable thermostat, but it won't kick on it's own. i replaced the thermostat and it is doing the exact same thing. that makes no sense to me!

biggles · 10-19-2008, 11:28 PM

what brand and model on that new stat

hvaclover · 10-19-2008, 11:40 PM

Check for a loose wire at the W or R teminal on the furnace.

Baring that you have a bad stat AGAIN, or some issues with the furnace,

Is it a standing pilot or an electric ignition.

36inchflange · 10-20-2008, 07:56 PM

it is an electronic spark ignition

36inchflange · 10-20-2008, 08:04 PM

the furnace is a HEIL NUGJ100AF02 it was a honeywell stat but i already took it back so i dont know the model number. the furnace is running great as long as i manually hit the up on the stat? any ideas.

hvaclover · 10-20-2008, 08:34 PM

Quote:

Originally Posted by 36inchflange

the furnace is a HEIL NUGJ100AF02 it was a honeywell stat but i already took it back so i dont know the model number. the furnace is running great as long as i manually hit the up on the stat? any ideas.

I don't follow what you mean by up on the stat.

Do you mean you increase the temp?

36inchflange · 10-20-2008, 09:44 PM

the furnace should kick on when the temperature falls 2 degrees below the set temperature, but it can drop 10 degrees below set temperature and it will not kick on until i hit the up teperature on the stat. then it runs perfect and shuts off just like it should. could it be a bad gas valve?

hvaclover · 10-20-2008, 11:15 PM

I'd say there are too many varibles to nail it down with out doing some tests.

10-19-2008, 09:40 PM	#1
36inchflange Newbie Join Date: Oct 2008 Posts: 4	furanace won't kick on automatically my 22 year old heil furnace will run fine if i manually press the up button on the programable thermostat, but it won't kick on it's own. i replaced the thermostat and it is doing the exact same thing. that makes no sense to me!

10-19-2008, 11:28 PM	#2
biggles Member Join Date: Jan 2008 Location: Long Island Posts: 3,250	furanace won't kick on automatically what brand and model on that new stat

10-19-2008, 11:40 PM	#3
hvaclover Member Join Date: Oct 2008 Location: Suburbs of Detroit Mi Posts: 3,702	furanace won't kick on automatically Check for a loose wire at the W or R teminal on the furnace. Baring that you have a bad stat AGAIN, or some issues with the furnace, Is it a standing pilot or an electric ignition. __________________ Just slow, not stupid.

10-20-2008, 07:56 PM	#4
36inchflange Newbie Join Date: Oct 2008 Posts: 4	furanace won't kick on automatically it is an electronic spark ignition

10-20-2008, 08:04 PM	#5
36inchflange Newbie Join Date: Oct 2008 Posts: 4	furanace won't kick on automatically the furnace is a HEIL NUGJ100AF02 it was a honeywell stat but i already took it back so i dont know the model number. the furnace is running great as long as i manually hit the up on the stat? any ideas.

furanace won't kick on automatically