Questions tagged [central-heating]

For questions regarding a central heating system for the home. The system consists of a furnace or boiler and a method to distribute the heat throughout the home.

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1answer
27 views

Vertical radiator on single stud?

I have an internal, decorated plasterboard wall (aka drywall outside UK) with poor studding: 120cm from its left end, there is a 22mm wide (i.e., as measured horizontally parallel to the wall) stud, ...
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1answer
38 views

Finding where the C “Common” wire should be in my heating unit

I'm trying to understand where the common wire would be from my system's wiring diagram. The thermostat itself only has the R and W connected. Is my understanding correct that it would be the wire ...
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3answers
1k views

Should I add air ducts when finishing my basement or rely on space heaters?

I am going have a finished basement of 1000 sq/ft which includes a theater room of 12X16. Currently I am in process of planning in stalling duct work to my basement. I am thinking of not putting duct ...
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0answers
37 views

Heater warms up but won't blow, fan is good

I have a Lennox Whisper Heat Central Heat unit model G20Q3E-75-4 natural gas heater. It worked fine until today, and nothing has changed about the house or the heater, we have electricity and gas. The ...
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0answers
34 views

HVAC furnance runs for awhile, stops for 2 minutes, then starts back up and continues to heat until set point reached

I have a Carrier 58GS150 system. At night it is set to 69. In the morning it is set to 72. Recently, I replaced the air filter. The system starts up fine in the morning and tries to reach 72. ...
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0answers
43 views

How to balance pressure in a multi-zone damper hvac with an always on bypass valve

Background I'm the new owner of a multi-family home where the previous owner was a large corporation that made money by overspending on renovations. Thus, they tended to renovate with top-tier ...
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1answer
17 views

When switch furnace on, ventilation fan turns off

Ventilation fan works fine when heating is off but immediately switches off when heating is turned on. Consequently the furnace runs for a minute and then overheats and turns off. Any idea what could ...
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1answer
38 views

Best way to temporarily relocate a radiator?

I need to move a radiator a few feet along a wall for about a year or two to avoid some furniture, and then move it back to its original location. I'd therefore like to avoid having to lift all the ...
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1answer
32 views

Zoned Forced Air System Runs 2.5X Upstairs vs. Downstairs

I bought a house built in 2005, ~4100 sq. ft. Reasonably insulated to code, as required in Chicago, IL. I've got an upstairs thermostat and downstairs thermostat. Both are Nest thermostats ...
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1answer
39 views

Heater blowing cool air

I did an experiment with the central heater when I noticed it was blowing slightly cool air. I first let the temperature drop to 67 degrees. Then, I set the thermostat to 68, which triggered the ...
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0answers
15 views

Improving HVAC post Remodel

We are living in a house that was originally built in the 80s with a gas furnace and forced air. Prior to our purchase, the house underwent a significant remodel including the addition of two rooms ...
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2answers
125 views

Radiator behind sofa - Box Design

Unfortunately, the only place we can have a sofa is in front of the radiator and the radiator cannot be moved. I am thinking about building a box around the radiator to achieve the following: The ...
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1answer
771 views

Bleed radiators with no valve - is this valve near the boiler what I want?

I recently bought a house, and with the winter starting to set in (UK), have started putting the heating on in the mornings/ evenings. As many people are at the moment, I am currently working from ...
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2answers
143 views

Two zone hvac on single compressor [closed]

I have a two zone HVAC system with two compressors (A and B). When I run the heat on Zone 1, it uses compressor A and when I run the heat on Zone 2, it also uses compressor A. When I run the A/C, it ...
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1answer
80 views

I live in the Northeast area of the US, and my emergency heat on my furnace/ac is broken. Can I get thru the winter months without fixing it? [closed]

I live in the Northeast area of the US, and my emergency heat on my furnace/ac is broken. Can I get thru the winter months without fixing it?
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2answers
91 views

What can be safely attached to a gas furnace cabinet?

The gas furnace in my house is in my laundry room about 3 inches from a stacked washer and dryer. As such, my laundry room is short on space, so I had the thought I could add some organization by ...
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2answers
106 views

Why are their no cheap wifi thermostats? [closed]

We have a simple analogue dial-based room thermostat. The sort of thing that costs about £15. I'm considering replacing it with a programmable one - which would cost maybe £30. When I recently went to ...
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1answer
34 views

Boiler not responding to external wired switch

My boiler has suddenly stopped receiving signals from the external switch. (models listed below). I'm trying to isolate the faulty component. There is no fault code on the boiler. It seems to be ...
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0answers
40 views

How best to capture and move the heat from oil furnace stove pipe more efficiently throughout room

In my basement the stove pipe that goes from the oil furnace to the chimney is always hot, so I feel like I should be capturing this extra heat and moving it about the basement. How do I keep this ...
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0answers
32 views

Replacement HVAC blower motor fails within 24 hours?

My unit is a Carrier Infinity (FE4ANF003T00ABAA) with an ECM 3.0 blower motor. To start, the thermostat reported a “Code 41 - Blower Motor Fault”. I ordered a refurbished motor + control module online ...
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1answer
76 views

Troubleshooting Gas Furnace Problems

I turned on heat at the thermostat for the first time in several months. Things worked at first with hot air coming from the vents, until a few moments later when I noticed that the thermostat panel ...
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3answers
6k views

Does my furnace suck air from outside?

I've tried Googling this but the stakes are quite high and I don't want to be wrong, so I'm asking here. Wildfires are raging in California where we live, and the Air Quality is nearing the 'hazardous'...
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0answers
22 views

Heater does not start without a power reset

I have a Bonaire MB3-20I and it won't turn on unless I go in the roof and turn the socket off and then on again. When this is done, it stays on for as long as needed, but when we turn the heating off ...
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0answers
38 views

Replacing Central air with a Split system

I'm trying to replace two central Air conditioners (one per each floor. 2-3 ton each) in my home and I'm not sure if I should go with Ductless (because of a much lower cost) or pay higher and replace ...
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1answer
666 views

Flex-duct as a Trunk?

From my A/C supply plenum, I will have a trunk (approx 20ft straight run) with 3 branches coming off (each about 2 ft runs). This 20ft straight run would be perfect for a large flexible duct, and ...
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1answer
90 views

Move heat out of living room with fireplace

I have a sort of rectangular house with a 25 m2 living room at one corner, and the master bedroom at the opposite long corner of the house. All of the bedrooms are up another level from the living ...
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1answer
497 views

Can I have a shared exhaust flue for a high efficiency furnace and tankless water heater?

I recently purchased and am installing a 96% efficiency two-stage gas furnace. The old unit was an 80% efficiency unit using a 4" metal flue. This flue merges the exhaust of both the hot water heater ...
2
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1answer
91 views

HVAC Heat only comes on when Fan is set to “ON” (not Auto)

have a weird problem that JUST started happening. When I turn the thermostat up with the fan set to "AUTO", nothing happens. The furnace does not light and the fan does not come on. This worked fine ...
2
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3answers
110 views

How to track energy usage per zone?

I have an old oil boiler with 4 zones, individual zone pumps. I'm trying to track heat usage on a per-zone basis. Would it be possible to simply track how often each zone pump runs and apply their ...
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1answer
563 views

Nest thermostat e heat link replacing the old danfoss

I really need help with replacing this current danfoss thermostat with a new nest thermostat e heat hub. I'm in the UK. Below is the new heatlink just need to know what wires I need to wire and what ...
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1answer
3k views

Baseboard water heat not heating one room; Rest of zone/house is good

I have a baseboard water heating system set up in three zones. One zone consists of two bedrooms and a bathroom at one end of my house. The thermostat for that zone is in the hallway connecting the ...
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1answer
76 views

Why do radiators need bleeding? Where does the air come from?

I had to bleed a radiator for the first time recently. This made we wonder where the air that gets trapped in radiators comes from. I'm not looking for a specific cause for my own heating system, ...
2
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1answer
222 views

Viessmann Vitodens 200w, LCD screen stuck on

We have a Viessmann Vitodens 200w boiler and the screen on the weather compensating control unit (Vitotronic 200 Weather Comp Kit HO1) is stuck with everything lit up. I can’t find anything in the ...
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2answers
96 views

How can I use a pre-installed A/C unit for heat?

I just bought a house with a relatively two-year old A/C unit (installed 2018) and a natural gas furnace connected to central air. I'm interested in using the A/C unit as to heat the air in lieu of ...
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1answer
43 views

Tempstar 2 stage furnace restarting every 7 minutes - not going into high

I have a tempstar 9MPT model based furnace. Also sold under a number of other brands - comfort air, etc. It is a two stage heating with a PSC motor high efficiency furnace. After about 7 minutes of ...
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0answers
34 views

Trickling noise from thermal store

First off, I'm in the UK. I've provided links to some terms I've used in case they're not universal. I recently installed a used thermal store. It's set up as a vented S-plan system. When the valve ...
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0answers
58 views

Room Thermostat, Cylinder Thermostat and Central Heating pump wiring

I have a water cylinder that is heated from a wood burner with a back boiler. The cylinder is also connected to the central heating system (via coil inside the cylinder) and a separate pump. When ...
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2answers
328 views

How large should a return HVAC duct be relative to the size of the supply?

I have a 4 ton American Standard electric forced air furnace (with no A/C - just heat) with a single speed blower motor, circa 2006. My supply main trunk is 12"x20". The return side of the system ...
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2answers
82 views

How should I ground a heat pump capacitor?

Where do I attach ground wire on capacitor that has no designated ground connector?
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1answer
78 views

Frozen heat pump for 1st time

Yesterday I changed the blower motor capacitor on our heat pump and some general cleaning. Heat Worked “great” through the night. This morning coils covered with ice. Q.Could it be wrong Capacitor; ...
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0answers
43 views

Environmentally friendly methods for heating a large addition

I live in Southern California, and am writing this at my desk in the large family room, which is about 45 sq.m. (500 sq.ft.). This room was added on to the house, and our natural gas furnace doesn't ...
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0answers
91 views

Hookup Nest Themostat & Heatlink

I'm in the UK and trying to install a Nest Thermostat & Heatlink at home to control my hot-water and central heating and I'm having a few issues working out how my existing setup works so I can ...
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1answer
71 views

How to reduce noise on a warm air duct?

My heatings system is based on 80mm inox tubes. The air is warmed at a central location and distributed through these ducts.t The issue is that the air pump is a bit noisy. This noise is transported ...
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0answers
30 views

Can I get a wireless boiler enable signal?

I have wireless thermostats which are connected to my wiring centre which controls the pump and valves for the underfloor heating downstairs. On my wiring centre I have a boiler enable signal, which I ...
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2answers
158 views

What heating system do I have, and what can I do about water pressure in my shower?

New homeowner (UK based) and getting to grips with all that comes with that. I previously only lived in a flat with a standard combi boiler, my new home seems to have an older system in place ...
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1answer
586 views

Convert gas wall heater to inset fireplace

This wall heater is running on gas and has an electrical control. It is actually in front of the brick vent behind This is in the attic as the vent connecting on top Obviously this wall heater is ...
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2answers
325 views

Why does a system boiler with hot water cylinder not use a diverter valve?

I understand that it doesn't need a diverter valve... But I was thinking, couldn't the system be more efficient with one? For example, the central heating could run at a low temperature (35°-40°) and ...
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1answer
284 views

Why does my thermostat show code 'PF' after running the fan or A/C?

After running either just the central HVAC fan, or the central HVAC AC for just a few minutes, the Bryant thermostat (Model TSTATBBPB101, C Wire attached) screen momentarily shows "PF", and then goes ...
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1answer
260 views

Running AC/Heater when washing a cleanable filter

I have a heat pump/AC system with a washable air filter. I was told to clean the filter out and run water through it once a month. He told me to let the filter dry for 3 hours before replacing it. I ...
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1answer
285 views

Goodman furnace - C Wire connection

I'm trying to connect the C wire in my Goodman furnace in order to install a new thermostat. I've read all the posts on this forum about this specific issue so my question is whether i'm in the right ...

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