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Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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My furnace stop heating, the AC is fine the tech said a

Customer Question

hello my furnace stop heating, the AC is fine the tech said a damper was missing
JA: Did you double-check the thermostat's settings? And what about the filters?
Customer: ive lived here for 2 winters with the heat working just fine
JA: Do you plan on doing the work yourself?
Customer: he said the damper was missing and that's why it wont heat....ive never had it serviced so I don't know why it would be missing, again it worked for 2014/2015 season ....I did have the thermostat replaced--not sure if that is a problem
JA: Anything else we should know to help you best?
Customer: no, im just questioning the damper being the problem since, it has worked for two years without one
Submitted: 4 months ago.
Category: HVAC
Expert:  BillyHvac replied 4 months ago.

Hello,

my name is Billy.

Do you happen to have the make and model number of the furnace?

Customer: replied 4 months ago.
lennox....don't know model number
Expert:  BillyHvac replied 4 months ago.

thank you.

Can you remove the thermostat top section and tell me what color wire is on what terminal? And is this a gas furnace?

Customer: replied 4 months ago.
not a gas furnance
and is this the thermostat on the furnace or on the wall in the dining room?
Expert:  BillyHvac replied 4 months ago.

is this a heat pump?

I will at least need to know system...

And the thermostat on the wall of home where you set temps.

Customer: replied 4 months ago.
not a heat pump....im looking for model number now
Expert:  BillyHvac replied 4 months ago.

Ok our choices for Lennox will be

gas furnace

electric furnace

gas boiler

electric boiler

heat pump

package unit (all outside and ducted to the house)

Expert:  BillyHvac replied 4 months ago.

a picture will work also....use the attach files lnk

Customer: replied 4 months ago.
ok, ill take a pic
Expert:  BillyHvac replied 4 months ago.

pic of the furnace and pic of the thermostat on wall with top removed

Customer: replied 4 months ago.
sent 4 pics
Expert:  BillyHvac replied 4 months ago.

did you use the attach files link? I do not see them?

Customer: replied 4 months ago.
the file have little green check marks next to them
Expert:  BillyHvac replied 4 months ago.

got them...downloading now..

Expert:  BillyHvac replied 4 months ago.

Ok that G23 is a gas furnace....and the one pic is actually the gas valve.

There is a small round window in the bottom door, if you look in that door do you see a blinking lights

Customer: replied 4 months ago.
no blinking lights
Expert:  BillyHvac replied 4 months ago.

Thank you.

So if you turn it to ac or turn fan "on" from auto...does anything happen?

Customer: replied 4 months ago.
got to run back up stairs and then back down stairs to see if light blinking
Expert:  BillyHvac replied 4 months ago.

or just tell me if anything at all kicks on

Customer: replied 4 months ago.
not coming on at all
Expert:  BillyHvac replied 4 months ago.

we want to see if the furnace has power.

Is the bottom door on all the way tight and power switch on?