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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2answers
99 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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0answers
18 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
24 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
31 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
54 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
3k 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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17 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
28 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
150 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
42 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
85 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 ...
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0answers
14 views

Weak airflow after replacing furnace and add new A/C

I had Furnace HVAC before and I made a mistake not knowing what I had. We never had A/C. Recently I purchased this package from Costco: LENNOX ELITE SERIES AIR CONDITIONER SYSTEM XC13 LENNOX 80% 2-...
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1answer
45 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 ...
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3answers
73 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
250 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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0answers
49 views

A new boiler and the shower has no hot water. Cold water flow is fast. Any ideas on how to fix the problem?

I have a new Viesmann 50-W boiler installed two days ago by an engineer from a company. There is no hot water when using the shower (upstairs) because the boiler does not turn on to heat the water. ...
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1answer
307 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
72 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, ...
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1answer
95 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
87 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
32 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
31 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
41 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
66 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
54 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
60 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
42 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
56 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
47 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
26 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
108 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
309 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
101 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
171 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
57 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
167 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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4answers
153 views

Are individual electric heaters more efficient to operate than an electric boiler?

(Edited to provide additional info) My wife is looking to buy an old house (I'm guessing 19th century) that'll need a lot of renovating, including the heating system. Renovation works will include (...
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1answer
94 views

Flexible round duct - What to use

I'm re-routing some 10x3.25" duct through a bulkhead in my kitchen. Planning to change over to 6" round duct for a 4' segment that is relatively straight (no 90s). It was my intention to use non-...
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1answer
179 views

Vaillant aquaPLUS filling loop

I have to repressurize my Vaillant Aquaplus gas boiler, and I couldn't understand from the manual where exactly the internal filling loop should be fitted. The water pipes don't have any valves ...
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6answers
6k views

Is Electric Central Heating worth it if using Solar Panels?

I understand that electric heating is less efficient and comparatively more expensive than gas heating (propane or natural gas), but considering I live in Texas (a lot of sunlight) and I intend to ...
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0answers
24 views

HVAC: attic heat loss

Should a ventilated attic (w. Openings in the eaves) be warm in the middle of a cold winter that has a heat pump installed as the heating system for the living area below. If it is warm does that mean ...
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2answers
78 views

How do I determine why a sealed central heating system is losing pressure?

I'm currently trying to deal with a sealed central heating system in which the pressure is dropping by 0.2–0.3 bar per day (this is obviously far too fast, because the intended pressure for this ...
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1answer
40 views

uncontrollable heating in multi unit apt

I have a 6 unit 2 story apt bldg which has only one basement furnace controlled by one thermostat from the first floor apt #1. The duct work has dampers to each unit. the problem is that the temp in ...
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2answers
912 views

HZ432 and no heat in one zone

I have 4 zones... The following lights are on the HZ432: Heat 1 - red Heat 2 - red Heat 3 - no light Zone 1 - yellow Zone 2 - red Zone 3 - red Zone 4 - red I have heat in 3 zones, but not in one of ...
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1answer
8k views

Central Heat Won't Turn On When I Raise the Temperature on Nest Thermostat

I'm sure my heater is working. It's 47 degrees outside, and I'm only a little cool inside. My Nest thermostat is set to 67 degrees. The screen on my app (which agrees with the thermostat) is shown ...
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1answer
238 views

Is there a more environmentally-friendly alternative to using oil to heat a house with oil heating installed?

I currently live in a house (in the UK) which is too remote to be connected to the mains gas supply, with an oil tank which is used for central heating. This is obviously not great for the environment,...
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2answers
709 views

Can I just cut power to a central air and heating system, or should I follow a shutdown procedure?

I am going to install some NEST thermostats. The directions say that I should turn the system off by turning off the power to it. However, I'm worried that an abrupt power cut will be damaging. Do I ...
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1answer
11k views

Are these red lights on my Honeywell HZ432 why my bedroom isn't blowing in heat?

I just moved into a new multi-family house with central heat/AC and the 3rd floor bedroom doesn't seem to warm up very well. When the thermostat is on, I don't feel hot air blowing in from the vents ...
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1answer
531 views

How to improve heating/AC flow in second floor?

We moved into our house about a year ago and the second floor in my house never get enough heat in winter or cold AC in the summer. Our first floor can be a 72F deg while our upstair stays at nearly ...
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1answer
88 views

Why does my radiator only come on when other radiators are on too?

We've just fitted smart TRVs and since doing so we've noticed that the radiator in our bedroom is usually cold, even though according to our settings it should be heating up. It does heat up a little ...

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