Home Improvement Stack Exchange
Home Improvement Stack Exchange

Questions tagged [furnace]

The furnace is part of an HVAC or central heating system used to generate heat. Typically this is done with gas, a heat pump, or an electric element. For hot water and radiator based heating, use the boiler tag.

For more general questions, see , , and

Related components include:

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How can I avoid cold rooms due to combustion air intake?

I have a newer split level house (2006) with unfinished basement. The natural gas furnace is on the lower level in a utility room that is also laundry and bathroom. There's an enormous 8 or 10" pipe that serves as combustion air intake just over the…
JYelton
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What could be causing vibration in my furnace?

I have a vibraton in furnace only when flame is lit. Blower motor seems fine. Is this vibration normal? Recently replaced inducer motor. Heat exchanger has been replaced once. Does not appear to be any cracks or orange flame. Does not do this when…
Tim
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Connecting C Wire to Old furnace

I want to replace my existing thermostat with a new one which requires a C wire. Unfortunately I don't see a wiring diagram anywhere. I see that I have a 2 wire setup with the red being connected to the transformer. Where do I connect the unused…
shreyasfifa
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How can I test whether my furnace issue is the limit switch or the thermostat?

I suspected this issue during the winter and confirmed it now in the summer. Regardless of the temp in my home, the blower motor runs non-stop. In the winter this must have been causing my home to got through a permanent heat/cool cycle as the…
kareem
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Why won't my furnace turn off?

My furnace is running OK and heating the house. The problem is that I have the thermostat set to 66°F and it does not turn off when it reaches that temperature. I can turn it off manually at the thermostat but the blower continues to run for a…
Lisa
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Furnace fan starts slow and is getting slower

here is a sound clip, start at about :55 or listen to whole thing! https://clyp.it/3h54oe2q model is tg9s060b12mp11 luxaire, which comes up as York most places. Anyhow, what's the best way to diagnose if this is a motor problem or a capacitor or…
jqning
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Can I connect an electronic air cleaner to the 24v terminals of my furnace?

I have a Goodman GKS90904CX furnace and looking to install an Electro Breeze Air Cleaner. The air cleaner needs an R and C 24v terminal for power or a power outlet with the supplied transformer. I would prefer to power it from the Furnace directly…
skittymars
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Furnace keeps going into lockout

My furnace has been going into lockout after several retry cycles. This happens about 30% of the time when we turn on our heat. We had a repair person who came over quite a while ago, and tested all of the connections. After troubleshooting for a…
klayman
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After blowing heat the fan won't stop, continue blowing cold air for prolonged period of time (30+ min)

Not always, but often the furnace continue blowing cold air after blowing heat. It may blow cold air for more than 30 minutes. Under this conditions I also see the error code (8 red flashed) "Ignition lockout due to recycles". Is there anything…
sasha
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Garage Furnace Runs Only 45 seconds at a time

I have an older Janitrol Moffat furnace in my garage. It was converted sometime in the past from propane to natural gas. It takes quite awhile for it to heat up enough for the fan to kick in and once it does, it runs only for 45 seconds then the fan…
blaine
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Which brand of furnace is more reliable and lasts longer?

I'm in the market for a gas furnace and was wondering which brand is more reliable and lasts longer. Sort of like which car brands are known to last longer and/or be more reliable. Most of the brands out there do not seem to be really famous (top…
CarlGammaSagan
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Constant cold air from vents with new downdraft furnace

Replaced with newer, high efficiency furnace and cold air constantly coming out of vents (except when furnace running). It's like the downdraft is totally free flowing and when windy outside very strong cold air blowing out of the vents. Is there…
D Jean
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Goodman gas burner not lighting

Goodman warm air gas furnace. Gas burner would not light.Status code light blinked continuously. Igniter glows red hot. I cleaned flame sensor with fine grade sand paper. Checked transformer line voltage 110 volts in and 26 volts out. Sufficient…
Bill G.
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furnace question

I have a tenant that constantly sets the thermostat at 90 degrees for the heat. I have told her several times to stop because she will burn the unit up. What are the consequences of this and how long will it take for me to notice problems with the…
Carrie
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What is wrong with my gas furnace?

Note: the below was solved. It was a loose wire between the controller and the gas valve (the white wire on the diagram) This is about an old UltraMax Olsen HCS2 81AD gas furnace it looks like this and it sounds like this :-) when it is having…
MiniMe
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