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.
0
votes
2answers
37 views
What's wrong with my heater?
My heater only turns on if the temperature inside the home is 68 degrees or above. If the temperature inside the home is below 68 degrees, I can hear the thermostat click when I turn on the heater but ...
0
votes
1answer
34 views
Where is my furnace air filter?
We moved in to a house a few months ago and for the life of me I cannot find the air filter for the furnace anywhere. The furnace is a Payne brand. It's kind of old. In our hallway ceiling, we have ...
0
votes
1answer
18 views
Furnace blower motor starts but then starts clicking and eventually stops with a loud buzz
I have a Bryant furnace with a multi-speed blower. Yesterday I just replaced the capacitor and confirmed it is still working. The furnace turns on fine and the blower motor starts up when expected. ...
0
votes
1answer
27 views
Half of furnace turned off?
I moved into this house about 10 years ago, I noticed on the furnace that one of the breakers for the electric coils is off with a note saying "Leave breaker off". After cleaning out the blower for ...
0
votes
1answer
30 views
Furnace not heating after changing thermostat
I have an ancient furnace/AC combo that came with my apartment that originally came with a very simple battery powered thermostat, which I replaced with a modern Honeywell programmable wifi thermostat....
1
vote
3answers
52 views
Furnace continously shutting down due to lost or low flame sense (Rheem)
My furnace will run great for most of its cycle, but when it has almost reached the thermostat setting, I will hear it shut off, run the blower, then re-light. It will sometimes finally reach ...
2
votes
3answers
108 views
Why won't my furnace complete the startup sequence when powered by a portable generator?
We recently had a power outage that lasted several days and the house was down to 41 degrees and expected power restore was several days in the future.
I purchased a 3500 watt (5250 starting watts) ...
0
votes
1answer
27 views
Where on the board do you hook up a humidifier
I have a RUUD Ultra series furnace. I also have a generalair humidifier. Where on the furnace board do you hook up the humidifier leads?
I see HUM STAT and HUM OUT
Let me know.
Cheers,
KW
0
votes
2answers
28 views
Replacement draft inducer motor stopped working after 3 months
My Goodman GMNT060-3 furnace stopped turning on in October. The tech diagnosed a bad draft inducer motor, because the fan wouldn't spin freely and made a grinding noise when turned by hand. I replaced ...
0
votes
2answers
40 views
Do I need a fan in my furnace room?
My furnace room is small and has a new gas furnace and water heater. I usually leave the door open to the laundry room. My garage is adjacent to a wall in the furnace room. I'm thinking of putting a 4 ...
0
votes
1answer
40 views
HVAC York diamond 80 furnace A/C
So I have a York diamond 80 furnace and the motherboard burned out so Lowe’s came and replaced it. I’ve been using the heater because it’s winter right now but the other day I accidentally hit the ...
0
votes
0answers
26 views
my high efficiency furnace shuts off during sub-zero weather
My high efficiency furnace shuts off only during sub zero weather. I've ruled out intake and exhaust clogging, and water pump problems. Do you have any other ideas about what could be causing this ...
0
votes
1answer
30 views
Why doesn't my furnace start? Pilot Light ignites and continuous clicking
Why doesn't my furnace start?
Pilot Light ignites up and continuous clicking.
Video: https://streamable.com/i0av0
I was reading this question: gas furnace pilot light is lit,,won't produce ...
0
votes
1answer
12 views
Ruud Furnace Problem
About 10 year old High Efficiency Gas Furnace. In Basement of private home.
Slow flashing green light (minimal flame detection).
Main burner will light after second try by ignitor. Unit will run for ...
0
votes
0answers
21 views
Gas Furnace Creaks When The Wind Blows
I have a Williams Forsaire Top Vent gas furnace that creaks when a strong gust of wind blows. Could the venting be loose or not fitting right? Any ideas?
0
votes
0answers
32 views
Help adding C wire to furnace - Heat only system
Looking to add C wire into my furnace. Heat is currently running on two wires with older thermostats. Luckily the in wall wiring has three wires.
Any help to point out the C wire for my setup? Or ...
0
votes
0answers
24 views
turn on furnace blower with temp sensor
I have a wood stove in my finished basement. I am looking for a way to turn on the blower fan of my furnace once the temperature in the basement reaches a certain setting like 75 degrees, that is ...
0
votes
1answer
38 views
Bad gas furnace install?
I just got a high efficiency condensing gas furnace installed. I feel like it was done poorly, but I'm not sure. Some questions I'm wondering about are:
Do furnaces need to be level? It is visibly ...
0
votes
1answer
32 views
Propane wall furnace not firing
I have a propane wall furnance that is'nt firing, the thermostat is not appearing to trigger the unit. The pilot is fine and the thermostat is a simple unpowered one with mercury that appears to be in ...
0
votes
1answer
14 views
How to electrically hook up my humidifier to my furnace and have it run when furnace is running and not A/C in summer
How do I hook up my humidifier to my furnace so it only runs when furnace heats my house. Just want to make sure it does not turn on when A/C in summer goes on. The person who installed my furnace ...
0
votes
0answers
24 views
Do I need the “flow control” component on my furnace
Context:
My furnace supplies tank-less domestic hot water to my small house. The cold water pipe going into the furnace has a "flow control" component that limits the flow to 3gpm. I understand that ...
2
votes
0answers
21 views
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 ...
1
vote
1answer
30 views
Furnace Short Cycling
My furnace is short-cycling. I've tried the following:
replaced the flame sensor
Shorted the thermostat heat demand signal
Checked the blower capacitor
Checked the air intake filter
Checked the ...
0
votes
2answers
87 views
Is the gray insulance material asbestos? [closed]
This is a furnace room.
Is the gray insulation material (on the wall and above the pipes) asbestos?
0
votes
1answer
51 views
Furnace only blows 55 degree air! Pipes freezing, please help
My brother's cabin has a heil horizontal mount attic furnace model # NTC 5100 BFE2 that runs on propane. It's about 14 years old. Only 3 of the 4 burners work, but the heat only comes out at 55 ...
0
votes
1answer
101 views
How to wire humidifier to furnace
I have a Goodman high efficient furnace with a carrier humidifier attached to the back. The humidifier wasn't working because the solenoid coil was burned, so I replaced it with a new solenoid. The ...
0
votes
0answers
32 views
My furnace blower will not turn on when on when in E-heat mode with auto fan
I have an electric furnace Carrier model FB4ANF030. I enclosed the wiring diagram.
Issue:
The blower fan will not turn on automatically when the thermostat is set to "Emergency heat" and "Fan Auto". ...
1
vote
0answers
44 views
Can I provide low-voltage power for an HVAC humidifier from a standard outlet?
I recently bought an Aprilaire humidifier to replace an old one that came with the house, which I thought was broken.
After connecting the water (which does work and isn't clogged) and the wiring to ...
1
vote
0answers
42 views
Furnace Repair Gone Wrong?
My furnace stopped working last Saturday so I started troubleshooting to find the problem. I found that the board was not providing 110V to my inducer motor. So I determined that I needed a new board. ...
1
vote
0answers
41 views
How to stop the humming noise coming from my gas furnace when on Auto Heat?
My gas furnace makes a humming noise when on Auto Heat, like as if the blower motor or capacitor was bad.
However, the blower turns on and sounds fine when thermostat is set to fan ON rather than ...
0
votes
1answer
32 views
What amperage fuse for Trane XL-80 gas furnace?
I would think this would be something that could easily be Googled, but I've tried and can't find it.
We have a Trane XL-80 gas furnance and when we had an insulation guy checking out the furnace, he ...
0
votes
0answers
17 views
Furnace, heating when thermostat is at much lower
I have an oil furnace that heats the house with water pipes, and heats the hot water used personally.
There are two thermostats used, one for the house and second for the back porch.
The issue is ...
0
votes
0answers
23 views
Fan only mode not turning on blower - 2 wire blower
Our manufactured home has a colman furnace and for heating it works fine. I would like to use the fan only mode when we have the fire place going but it is not hooked up, and I just want to make sure ...
0
votes
1answer
22 views
How do I add a Venstar Add-A-Wire to my Lenox G12D2-82 furnace?
So I have a Nest Gen 3 thermostat and I am in need of a C wire. I have a Lenox G12D2-82 furnace. I have 4 wire set up. The Venstar makes 4 into 5 wires. I have a fan heat cool and power wires. There ...
1
vote
1answer
54 views
Can I just extend this blue wire in furnace for Nest thermostat?
First time doing this, don't want to burn house down.
The brown bundle is coming from thermostat, the white bundle I suspect is coming from A/C unit. Do I follow these steps?
Find a scrap piece of 18 ...
0
votes
0answers
16 views
Replacing Flame Sensor on Ruud Silhouette Furnace
I'm quite new when it comes to looking at furnaces. The furnace in my house recently started shutting off before getting to the temperature the thermostat is set to. Eventually we'd reset the whole ...
0
votes
0answers
45 views
Heating System Premature CutOff / DIY Options?
I've collected all of the facts about my system and the problem we are seeing. We have two external air pump units outside the house and a Rheem furnace (GH36S, 36000 BTU) that appears to be working. ...
0
votes
1answer
7 views
Draft Inducer replacement motor part number
The draft inducer motor in my Payne furnace started making a whining sound the other night, so I ordered a replacement from Ebay. My part number is HC21ZE121A, and the motor I got is missing the 'A' ...
0
votes
1answer
22 views
Carrier Furnace 58STX110-14122 fan starts the first time, but fails to start at subsequent calls for heat
On a Carrier Furnace model #58STX110-14122, when the initial call for heat comes on, everything works just fine in the following order:
Thermostat sends a call for heat
Draft Inducer motor kicks on
...
0
votes
0answers
25 views
AC Common wire disappears
On my furnace there is a wire that is labeled C/Common. But at my thermostat there is no common wire.
Wires on furnace control panel:
W - White
Y - Yellow
G - Green
C - Common
Wires at my thermostat:
...
2
votes
2answers
95 views
Old furnace with no “C” terminal for wifi thermostat
I'm new to this forum and was wondering if I could get some help regarding installing a Honeywell WiFi thermostat that requires a "C" terminal.
I currently have an older thermostat that has only 4 ...
0
votes
0answers
68 views
What is this pipe?
I discovered a 12" diameter concrete pipe traveling vertically from the basement to the attic of a one story house. The pipe is lined both internally and externally with metal. I would like to know if ...
2
votes
2answers
58 views
Why is this airduct twitching and making a noise?
I have an air duct in my basement. It leads from my furnace (I think?) to the outside world.
However, as you can see from this video, it is "twitching".
Every second or so it jerks slightly and ...
0
votes
0answers
17 views
I have replaced the fan motor and the heating unit in a goodman electric furnace
I need an easy wiring diagram for the motor and control board. where do the wires go from the board to the heating unit? I know the heat strip has a plug in but the old strip has a brown wire and the ...
0
votes
0answers
40 views
Can a Nest work in my setup (or am I stuck with Lyric, as they claim)?
Before crucifying me for the subjective question let me clarify that my question is quite specific if you read on.
I bought an old home with bad insulation and a 55-year-old furnace 3 months ago. I ...
2
votes
2answers
66 views
Water dripping from outdoor HE furnace vent
Newly purchased home (December, northeast U.S.) has a high-efficiency furnace that vents to exterior of the house. When the furnace is on, the vent drips every few seconds, creating a puddle in the ...
5
votes
1answer
975 views
Why does my furnace only work after power reset?
I’m having issues with my furnace sometimes not kicking on.
I hear the furnace start, But then it will not fire.
However, If I go down to the basement and flip the power switch off and on the ...
2
votes
1answer
151 views
What kind of tubing should I use for draining condensate from a furnace / boiler?
"High efficiency" & condensing boilers or furnaces produce an acidic water byproduct called condensate that has to be drained away.
My boiler has an outlet fitting for this condensate water but ...
1
vote
1answer
58 views
Finding the c-terminal on my furnace
I have a two wire furnace. I’ve been doing a lot of research but haven’t found anything super similar to what I have at my house. I’m trying to find where to connect the c-wire. I have a couple of ...
1
vote
0answers
18 views
Furnace won't light when fan commanded on
House and furnace are 5 years old. Furnace is an Allied A95UH2V090C16S-07 and is interlocked to a Lifebreath HRV. Functioned fine up until a couple days ago.
My wife calls me and tells me that ...
