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.
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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 ...
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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 ...
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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". ...
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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 ...
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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. ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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. ...
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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' ...
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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
...
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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:
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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 ...
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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 ...
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2answers
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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 ...
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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 ...
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38 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 ...
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2answers
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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 ...
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636 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 ...
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1answer
147 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 ...
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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 ...
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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 ...
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3answers
77 views
Do HVAC technicians need to be registered or licensed? [closed]
We had several HVAC companies come out on a Sunday to look at our furnace. Unfortunately, it could not be fixed. Each contractor offered their solution and did not charge us for their time- but if ...
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28 views
Do I need a sealant between inducer motor and flue transition on furnace?
I just replaced my inducer motor for my furnace, and have noticed there is hot gas that leaks between the flue transition and inducer motor.
I can't remember what it did before the switch, but it ...
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1answer
31 views
Oil furnace cad cell problem
Alright so earlier I posted about my furnace not staying on , I had my question answered fully, but seeing as it just snowed about 18 inches here Im not in the position to call anyone to diagnose , ...
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1answer
66 views
York furnace not firing up correctly
I have a York TG9S080B12MP11A up-flow configured natural gas furnace. We have had the furnace since 2007. I am having an issue where the furnace is not starting correctly.
When I power up the blower ...
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1answer
31 views
New primary control switch problems
About a week ago , I had someone to come in and replace my old RA116 stack switch with a Honeywell R8184G oil primary , for the first day it was fine, next thing I know the furnace turned off and ...
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Aprilaire 600 unit is mkaing an very loud noise when starting up
My Aprilaire 600 unit is making a very loud noise when starting up injunction with the furnace starting up. After taking the water pad off and watching the start of the furnace, the water came rushing ...
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Do I need to replace my pressure switch in my Goodman furnace?
We have a Goodman GKS9 Gas-Fired Warm Air Furnace. I've changed the air filter, cleaned the flame sensor, and checked the condensation pipes for clogs. They're clear. The behavior seems strange to me. ...
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What causes popping in new wood floor when furnace turns on?
I just had new solid wood floors installed and i hear popping where the floor meets my kitchen wall each time the furnace turns on (lasts for about 3 minutes). what causes the popping and how do I ...
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1answer
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How do I create a C wire? [duplicate]
My furnace is old and only has 4 wire connections, but I require a C wire. How can I create one based on this diagram?
I do have 5 wires running between the furnace and thermostat.
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How do you increase humidity with HRV system?
I’m wondering how to increase the humidity in my home. I have a venmar constructo HRV system and have looked at the manual and many videos and can’t find the answer. I’d like my humidity to be 35% for ...
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HVAC experts - what do you think about my coils? Furnace showing more than 144 degrees
I have two furnaces - one for each floor. One of the furnaces that were replaced within a year keeps blowing cold air randomly. I would reset it by turning the main power switch off/on and then it ...
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1answer
24 views
burners out of sequence with blower motor
I have a Bryant furnace plus 90 model #398AAW036060D. I just changed the blower motor. In the last five years I've changed the main board, inducer board, pressure switch, and cleaned the igniter the ...
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1answer
33 views
Home furnace not kicking on or staying on
I have a furnace question. Our house has an Amana furnace and it won't seem to kick on.
For context, the temperature in the house is around 60 degrees or so. When setting the thermostat higher, a ...
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1answer
21 views
Wall grille that fits one step stair
Between my dining room and living room upstair area, there is one step down and there is a wall grille that is 5.5" tall.
What drives me nut is there is no 14x5.5 grille anywhere. There is either ...
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31 views
Honeywell Thermostat to Nest E Dehumidification
I am trying to replace my Honeywell Prestige IAQ thermostats. I noticed that my downstairs thermostat has a dehumidification option (upstairs shows no such option). I checked the wiring at the ...
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1answer
62 views
Why is my thermostat turning the heat on too soon?
I have recently come across an issue with my thermostat and when and how my heat comes on.
My thermostat seems to be an old round Honeywell. I set my temp at 65 typically. As of last night my ...
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3answers
323 views
Is it bad to close furnace dampers in order to balance temperatures seasonally?
I have a two story home. As such, it's always hotter on the second floor than the first floor.
As advised by many articles and how-to videos out there, I usually close the dampers in the ducts ...
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1answer
43 views
Whole house humidifier when furnace is in unconditioned space
I have 2 furnaces, one in the garage and one in the attic. These are both spaces with unconditioned air, so they get very cold in the winter. The contractor who helped me configure my garage furnace ...
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Carrier Weathermaker 8000: in heat mode, no flame and fan only turns on in fan on mode and not auto mode
model #: 58DLX090 ---- 10114
series: 100
My furnace worked until a couple days ago. Last night when I turned to heat mode and increased the temperature, nothing happened. So I took off the furnace ...
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2answers
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Electric furnace doesn't perform a cool down stage
When my electric furnace shuts down the fan also shuts down at the exact same time. I was told that it should run for a bit afterward to cool off the coils. Doing some research it looks like this is ...
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1answer
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Furnace getting power, but heat/AC not kicking on. LED on board is not lighting up. Thinking the transformer is gone
So far I've been successful in maintaining and repairing my own HVAC system in my house. First week we bought the house (we knew going into the purchase) I replaced the main board. It's been golden ...
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1answer
148 views
Furnace won’t stay running and when the blower motor runs it sounds like it is sucking up water
Part red arrow is pointing to keeps filling up with water and when the motor/fan (blue arrow) runs it sounds like it sucks up water and then furnace stops heating.
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Condensing furnace short cycling
I have a strange problem.
I have an IPC/Tempstar T9MPD075F12A3 condensing furnace, roughly 12 years old. It uses a Honeywell SV9541M "SMART VALVE".
EDIT: Just found the service manual, checking ...
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1answer
68 views
Connect C wire to Furnace
I have a Lenox Merit system in the house. I am trying to install Nest E thermostats and want to do it with a C wire. I noticed an unused Blue Wire (pic attached) at the thermostat location and then in ...
