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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Google Nest Causes Furnace to Need Reset
After installing a Google Nest, my furnace heats until it reaches the correct temperature, but if it sits, the controller light turns off and I need to turn the breaker off and then back on in order ...
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Why does a garage gas heater need 8' clearance from the ground when a home furnace sits on the ground? [closed]
This unit comes at the price of a wall direct vent propane heater but it requires 8' clearance from the ground. Why does it need that clearance when a regular direct vent furnace even with a higher ...
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Where do I hold the lighter to start the pilot light [closed]
Is it behind the black thing on top somewhere? All the videos say it's at the end of this tube but I don't see where.
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Will splitting a furnace duct cause a problem?
I have two rooms (entry (1)) and (living (2)).
The House was built in 1900 and the two small rectangles 1 and 2 represent returns.
At this time only 2 is connect in the living room with a 6 " pipe ...
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Overlapping HVAC
I had about a 1,500sq ft single level ranch style home. A few years ago I added on a master suite and a family room, so now about 2100sqft.
The family room has a large pass-through to the rest of the ...
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another common terminal question on an old furnace control board
I've spent quite a bit of time trying to sort this by looking at existing solutions but still not following. Can you tell me where I can tap in to pull a "c" wire from to the thermostat?
I'm ...
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Furnace keeps turning off [closed]
My 10 year old furnace turns off after about 3 to 5 mins of running and I get error code 33 for a Bryant furnace, but if I leave the door off the furnace runs just fine. I cleaned as much as I could ...
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Gas pilot out and thermopile reads 600+mV, is it worth trying a new one?
Gas hot water furnace. Pilot won't stay lit, goes out as soon as you release the button even after 60+ seconds.
The valve is a Robershaw 7000M8ERHC, with a Robertshaw 1951 thermopile. The ...
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Sound from gas fired heater, sounds like rotary equipment
Video
I am not very familiar with the system, it's my mom's and my dad used to clean it out and test it every year. The noise doesn't bother us too much in the house, but I am more concerned with a ...
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Condensation pipe from air handler is making gargling sound
I would appreciate some help on a new gargling voice coming from my HVAC furnace (first time using this season - this didn't happen last year).
As shown in picture, there are 2 small tubes coming out ...
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Can my Furnace and Water Heater share an exhaust?
Prelude:
First properly cold day of the season and I was expecting my furnace to kick in, but it didn't.
I went down into the basement to take a look at it and found it giving me an 2-blink error code ...
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Does my furnace humidifier need a transformer?
I'm installing an Aprilaire 700M Humidifier in a Bryant 340MAV Furnace.
I looked up the furnace manual and it states:
A quick-connect terminal (HUM) and screw terminal (COM24-v) are
provided for 24-v ...
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Should I reroute this drain tube inside my HE gas furnace? [closed]
My furnace, a high-efficiency gas model from Rheem, is about 5 years old. I recently had to replace one of the pressure switches and so I was looking around the inside of the furnace.
There is a ...
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How to connect thermostat to this furnace?
I have an oil burning Brock EliteAir furnace, it has 2 wires Tw and Tr on the burner section going to the thermostat. BUT there are C Y G R wires on the side ( where there's a fan logo) that are not ...
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Oil furnace keeps locking out [closed]
My oil furnace keeps locking out on a daily basis. The reset button causes it to start, but within a day it always locks out again, usually overnight.
The boiler is a Buderus and the burner is a ...
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Is it possible to upgrade A/C to a heat pump by only replacing outside unit?
I have a standard southern California tract home that was built in 2010. It has a Carrier gas-fired furnace, Carrier 5-ton A/C, and a smart thermostat.
I'm slowly upgrading the major systems and ...
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furnace high limit switch turning off burners
I have a goodman furnace model gcs90904cxa. All filters are brand new blower replaced last year new limit switch vents open in house exhaust and incoming air vents clean inducer motor free turning. ...
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Why is a MERV-16 filter not recommended for residential furnace use? Urban myth?
Someone from an HVAC duct cleaning company told me today that MERV-16 charcoal filters are harder on the furnace and that the charcoal is a gimmick that just costs more. He said he went to a class ...
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Lennox G40UH transformer multi fail
My Lennox GR40UH keeps burning out the 24V transformer. I'm on the third transformer in about as many days of operation over the last couple of weeks. I added A/C to the system a couple months ago. Do ...
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Fan Forced Garage Heater blowing 3A fuse
Mr. Heater forced air heater that is blowing the 3a fuse instantly. Supply voltage is good, transformer secondary is 27v. Removed stat wires off control board, still blows fuse on powering up. Checked ...
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Does our home heating boiler need to be inspected/serviced?
We have hot water heating (that is the boiler heats water and pumps it to different parts of the house) and the unit is about 12 years old. It is a Utica gas boiler. As far as I can tell, it is ...
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Adjust Multi-Speed Carrier Furnace via thermostat as in manual, or need to rewire?
I have a Carrier 59SC2C100S211120 furnace. The blower is pretty loud and everyone says they really feel it when it comes on. I would like to turn down the blower in normal operation and then, if also ...
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Very old Payne furnace blower motor hums but won't start
My mother has an old Payne furnace (20+ years old) and the blower motor is no longer kicking on all of a sudden. When the motor tries to start, it hums/buzzes pretty loudly, but won't kick on.
My ...
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HVAC and water heater help
I need help deciding what to do in my home. We have a small closet upstairs that contains our furnace and water heater. The air conditioner currently installed is not working and has been turned off ...
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Why is my heater constantly on?
I have a heat-only electric furnace. Bypassing the thermostat, the R and W terminals on the control board are always connected. The thermostat is good but something is causing the control board to ...
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Gas burner periodically stopping with blocked vent error
We are working with our installer on this issue but would like more input. He suspects negative air pressure in the house
This is a gas burner installed in a room with all inside walls - center of a ...
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Brivis Wombat Classic startup behaviour
I have a Brivis Classic 2P Wombat 26 gas furnace in a place we moved into late last year. We didn't really experience winter then so hadn't had much of a chance to use the ducted heating much.
Now ...
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Advice on how to wire a 4 wire RGWY wifi thermostat to an old hvac with no c wire?
I have a 4 wire RGWY coming out of the wall to my old thermostat with no additional wire available for c wire. I was going to use the green one instead as I saw a tutorial online, but when I got to ...
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Can I use a pair of 2" PVC pipes for a furnace requiring 3" venting?
Can i use two existing 2" PVC pipes from old furnace and tie them together with a Y connection going to the exhaust of a new furnace that requires 3" exhaust?
New Furnace is 100,000 btu. 2” ...
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Is 2 stage furnace worth it in dual fuel setup?
I am replacing a gas furnace with AC unit with a gas + heat pump system.
Looking at 2 stage furnaces I was left to wonder if its advantages hold in that setup. If gas is only used for temperature ...
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How to estimate and compare operating costs of gas vs electric furnace?
My home has an old electric, central furnace. All of my neighbors are on natural gas. I pay 5-6 times as much as they do on my heating bills during winter months.
I can either convert my home to ...
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Where do I connect my common wire (C wire) for smart thermostat?
I've been running 2 Nest thermostats (1 upstairs, 1 downstairs) for years that didn't require a common wire. I'm replacing them now with Ecobee3 Lite thermostats. Both thermostats control heat from ...
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Junction box for furnace fuse reads hot with NCVT, but the furnace operates normally. Is this dangerous or incorrect?
Location: United States, Colorado
While diagnosing an unrelated electrical issue during renovation, I discovered that the junction box containing a fuse and switch, which provides power to my furnace, ...
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Can a blown furnace transformer cause "hot spots" on the furnace circuit board?
We had a/c installed yesterday. The technicians had to pull out then re-install the furnace. In the process, they blew the furnace transformer. They also showed me some "hot spots" on the ...
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Help with installing Google Nest thermostat
I have a Google Nest I want to install and I saw there was an unhooked blue wire at both ends, so no big deal right? Wrong, apparently. What the heck? We have a Climatrol 170-1-080-02-00 furnace and a ...
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Furnace doesn’t have a c wire and or board
Have an old Colman unit in a modular home, needing to hook up c wire adapter. Does not have a circuit board. Any help on trying to hook up c wire would be great. Tried loading photo but will not let ...
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Water heater flue and fresh air intake letting in pests
The heater is in a closet in hallway. The flue is going up into attic. Attic insulation 3 yrs ago filled duct (pink insulation). Placed bug traps in closet, nothing 1st year. Lived in place 7 years ...
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Does my high efficiency furnace need two sources of outside air
I had a high efficiency furnace installed. It has a pipe leading to outside for intake. My old furnace had a vent to take air into the firebox. Can I now block that vent since the new furnace has its ...
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Is it safe or even code to place a furnace on top of a main water line?
This is a new build. Builders have allowed this but I anticipate if I ever have a problem it will be a complete disaster.
The furnace is sitting on top of the main water line coming out of the cement ...
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No Power To Humidifier
Hoping an expert here can help me out with an issue. I have a Goodman GMV9/GCV9 furnace and a General Aire 1042-L humidifier. When I went to replace the filter for the humidifier, I noticed it was dry ...
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Can I connect a C wire to enable a furnace fan?
Hot weather is here and we don't have AC in our rental house, but our thermostat does have the fan option. After searching online, and seeing other solutions, I decided to look into our setup.
All ...
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Lennox Wiring for Ecobee SmartThermostat
Confused by the wiring, hope someone can help me out. At the furnace there's only four wires in the cable (R, B, G, and W), but at the other end, a yellow wire appears. It's not reflected in the ...
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Is it possible that Thermostat Y wire and C wire is the same wire on my air handler (furnace)?
I'm trying to install Ecobee, and like many others, I do not have C wire at the thermostat, thus need to find it on my air handler.
My air handler is from Allstyle and the model number is HFD36-42840G-...
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My apartment uses a gas furnace. The gas technician shut off the gas to the furnace stating that "the return air box not sealed"
We had a gas service interruption the other day. When the gas technician come by to turn on the service, he noticed that the gas furnace had "holes". He then shut off the gas to the furnace ...
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Musty smell from furnace
When switching from cooling to heating in the fall we get about 2-3 days of musty air and then it's fine all winter. It's like wet sock/sneaker smell.
Yesterday, the A/C kicked on because our house ...
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Can I add an extension to an air intake for apartment central A/C? Is this a health or code violation?
The apartment I am living in has a nasty odor coming from underneath the furnace/ac and water heater. The air for the furnace is sucked up from this underneath section making all of the air that is ...
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Rhythmic tapping/banging sound on the external AC unit coupled with transformers in the furnace blowing out
We have a strange issue.
We bought a house recently. We have several issues:
External AC unit keeps making banging sound when heat is on
The HVAC furnace stop functioning. In the last 6 months we ...
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How can I diagnose why my oil burner is not coming on?
I have a Buderus oil furnace with a Riello burner and Hydrostat controller and it does not appear to be coming on when it should. For example, right now the controller has the green dot lit, which ...
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Black tar-like stucky subtance leaking slowly building/leaking from furnace pipe
Could someone please tell me what this substance is that is leaking from my furnace pipe? It seems to be coming from the gasket area (see pictures). Thank youenter image description here
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Trane Furnace not starting in freezing rain - three flashes
I have a Trane hot air furnace that has recently become temperamental with freezing rain or snow contaminating the air supply. Can humidity in the air supply interfere with its operation? In new ...
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