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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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Calculate/estimate power of existing central heating radiator (UK)?

Having one type of the radiator, how to "guess" it's output power to make sure I replace with comparable power output (little narrower, probably a bit higher)? Are there any on-line tools or ...
Michał Fita's user avatar
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1 answer
51 views

Fitting radiator between pipes from the floor, calculate dimensions, power (UK)?

I have two pipes from the floor to connect the radiator into. Current one has bizarre bends added on one side so wider one fits in, but I want to change it to "designers" one that would ...
Michał Fita's user avatar
1 vote
1 answer
63 views

Nest Power Connector (C Wire) on A/C unit GMP075-4

I’m trying to use a Nest thermostat on my older Goodman GMP075-4 unit. I have a Y, R, W, and G connector for the thermostat. I’ve read through a few number of the other questions related to this on ...
ariagno's user avatar
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0 answers
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flex duct work with K&T

Can I run flex ductwork in a floor joist with coated knob and tube in good condition. the length of the run will be 2 feet. trying to get the register to be under the cabinets instead of the floor.
Steve's user avatar
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Why is my radiator not getting hot?

I have S-Plan system. The heating valve has two loops, upstairs and downstairs. There is also a single downstairs radiator connected to the loop before the valve. The issue started after we replaced ...
SR3142's user avatar
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2 votes
2 answers
194 views

Help identifying the purpose of a central heating valve beside boiler

I have a 12 year old Pottington gas combi-boiler running my radiators and water tank. I was checking the central heating loop pressure today and I discovered a twisty valve I never used before. I ...
spl's user avatar
  • 245
2 votes
2 answers
862 views

Troubleshooting Lennox furnace error code E228 -- failed to calibrate pressure switch

I have a 90% efficient Lennox furnace, pictured below. Last night the heat stopped working. It actually had stopped working maybe a couple days ago too, but it fixed itself after a few minutes--I ...
Rodrigo's user avatar
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Why does my gas furnace sometimes fail to start, but thermostat believes it is on?

I have a Bryant 394CAZ036100 natural gas furnace that operates normally part of the time. But at other times, though the thermostat thinks the heat is on, the furnace has failed to turn on and the ...
Brian B's user avatar
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2 answers
51 views

Help with an older home that I am renting

I'm renting a home that was built in 1982 and has some issues. Mainly, it needs all new windows, the attic insulation needs to be redone, and the doors should be replaced, but at the very least needs ...
August Wehner's user avatar
-1 votes
2 answers
102 views

How do I find the source of my furnace's condensate leak?

I bought a house in November that had a brand new high efficiency furnace put in sometime in the summer. There is water coming out of the furnace and not the drain pipe. Is this a clog in the pipe or ...
JGodfrey51's user avatar
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1 answer
144 views

Are my condensate drain pain and p trap installed correctly?

Long story short, previous owner of my condo said the condensate overflowed into the ceiling. The building inspector suggested having an exterior drain pan installed. After move-in, I hired an HVAC ...
James's user avatar
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1 answer
44 views

What is the name of lead or connector I need to connect up this Actuator valve head?

I have a ESI ZV-222/W valve I need to connect into my central heating system in order to replace a faulty valve. The ESI ZV-222/W is a spare I have, and I do not have a lead or connector for it. What ...
Drake's user avatar
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1 vote
0 answers
79 views

Furnace blower works when turned ON from thermostat. Furnace does not start when Fan is on Auto mode - gives blower communication error

My heating (Forced Air/Gas) stopped working and I noticed B5 error code on board - "Blower motor locked rotor". After replacing the blower motor (ECM motor), I am getting B1 code - "...
user179432's user avatar
4 votes
2 answers
614 views

Is there a way to run my furnace fan intermittently without heating the house more? [closed]

We just moved into our first house in September and it's old but surprisingly well insulated. We don't like it overly warm either so in the winter the thermostat is often set to 18°C/64.4°f The ...
MoistVonLipwig's user avatar
1 vote
2 answers
1k views

What does "Auxilliary heat is running too long" mean in my ecobee

Not sure why this happened to our home while we were away, but all of a sudden this showed up and lasted a long time. Right now, it's all good. What should I check to make sure it won't be an issue ...
Lara Bernadine's user avatar
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0 answers
21 views

Are H block thermostatic radiator valves universal?

I have bought the following radiator: https://www.bestheating.com/milano-bow-anthracite-d-bar-central-connection-heated-towel-rail-1800mm-x-600mm-61170 However, the company supplying that radiator ...
fractor's user avatar
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4 votes
4 answers
1k views

Will lowering the central heating water temperature reduce cost when using district heating?

We live in a fairly well-insulated house which uses district heating for the central heating. The individual radiators are controlled by a smart thermostat system. The hot water in the radiators comes ...
Sanchises's user avatar
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44 views

Water gets cold when central heating is on?

I have a Vaillant System Boiler with an external cylinder to store hot water. After heating the water, If I switch on the central heating the water supplier to the taps/showers gets cold after a short ...
james's user avatar
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1 vote
1 answer
610 views

How to wire ecobee thermostat to central heat pump (two wires only)

I apologize in advance if this is not the correct forum for this. If so, please let me know where I should start. I am looking to have my central heat pump set up with Ecobee Enhanced. For background, ...
Zach's user avatar
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1 vote
2 answers
138 views

Central heating loop not getting hot

I have two wet central heating loops: one for the radiators, one for the underfloor heating. One these loops (the UFH loop) is not getting hot. I have found where the two loops split and checked the ...
Puffafish's user avatar
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1 vote
1 answer
190 views

How do I wire the replacment motor on my central heating valve?

I have a standard 'y' plan central heating system with a Honeywell V4073A1039 3-port diverter valve. The central heating was obviously installed by-the-book because the wiring almost exactly matches ...
ConanTheGerbil's user avatar
2 votes
0 answers
66 views

Advice on use of Boiler Reset Device in 2023

Question: I'm looking for wisdom, tips and tricks regarding installation of a "boiler reset", a device that reduces water temperature in a central heating system on moderately cold days. ...
jay613's user avatar
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251 views

Replacing Honeywell Thermostat (UK)

Hiiii, I'm in the UK and trying to replace an old battered thermostat. I have a Honeywell ST6100A and I'm looking to update to a Honeywell ST9400C. I somewhat naively thought that because it was the ...
Mike's user avatar
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0 votes
2 answers
864 views

How do I add central AC to my existing central heat system?

We currently have central heating. The unit is in the attic. The duct work is also in the attic. How would I go about adding central AC to my existing setup? How would I go about doing this my self?...
milesmeow's user avatar
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-1 votes
1 answer
95 views

From heat load to CFM and where does 400/ton come from?

Based on this answer I have finally calculated my heating load of the total house as well as the distribution for individual ducts (rooms). Note that the formula for the heat loads was: BTH/h = ∆T * ...
divB's user avatar
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0 votes
1 answer
1k views

Condensate pump making loud noise

Attached to my furnace, there is a Beckett CB151UL condense pump. After every cycle of the furnace (either heat or cold) the pump, removes water from itself. It has started doing a loud whining/...
gmalenko's user avatar
2 votes
4 answers
686 views

How to bleed central heating in a bungalow with pipework going into the loft?

I am planning to change the radiator in the bathroom for a heated towel rail, but before I do, I want to be sure of the air bleeding procedure as I am only used to central heating in 2 storey homes. ...
Chris Rogers's user avatar
1 vote
1 answer
255 views

Hole in HVAC furnace under filter normal?

I looked under the HVAC furnace today and noticed a hole near the filter installation. It seems like it should have been sealed up because air can be taken in bypassing the filter. Is this typical and ...
jpQuick's user avatar
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1 answer
166 views

HVAC unit upgraded, contractor cut a new return in the oddest spot

My old HVAC system suffered damage due to a lightning strike. I called up a local service co. and they sold me on a Trane split-system that was slightly oversized compared to what we had. The new ...
Jamesfo's user avatar
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1 vote
1 answer
147 views

How can I identify my electric furnace?

I have a woodchuck wood and coal furnace which someone added an electric heater on top of. The issue is I can't identify the electric heater, and it's in need of some servicing. Anyone recognize ...
Tyler Smith's user avatar
2 votes
2 answers
201 views

Boosting the output of a central heating radiator

The indoor temperature is hovering around 20C on a regular day, I'd like to kick it up to 24C and not have to use electric radiators to supplement the heating. In this apartment there are old soviet ...
user81993's user avatar
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0 votes
0 answers
34 views

Outside unit won’t work when inside blower fan spins correct way only when it is going wrong direction

I have a universal motor on my inside electrical unit. It runs but doesn’t have much air flow (like can barely feel anything even from the closest vent) so I swapped the direction wires and it gave me ...
Noob hvac's user avatar
0 votes
1 answer
299 views

Heat Pump only heating for a few mins

I have a heatpump that will only run for a few mins before shutting off, inside blower runs nonstop. Cycles on again in about 45-60mins.(vent blows out warm air the first few mins then room temp air ...
greg cbc's user avatar
-1 votes
2 answers
70 views

What features or terminology do I need to look for in selecting a suitable climate control solution

Background: We have a heat pump driven central heating system with four zones. Currently, the system operates as follows: The heatpump heats a deposit of water Water pumps, 4 in total, connected to ...
Richard Corden's user avatar
1 vote
1 answer
105 views

diesel powered heating - identification and advice request

I bought a house and the owner is a few steps removed from the last user of the house which leaves me at a loss as to who I even need to speak to about the machines and systems. My hope is that I can ...
Alex's user avatar
  • 125
21 votes
10 answers
7k views

Why does bleeding radiators save energy?

I wanted to bleed my radiators by myself for the first time and I was wondering what is the reason that bleeding radiators saves energy? Most of the guides on bleeding radiators mention that this is ...
user161351's user avatar
1 vote
3 answers
442 views

Does it require separate condensing units to allow for different rooms to remote control HVAC temperature?

If I want to have a system where one bedroom is blowing hot and another is blowing cold air through remote controlled internal units, do I need multiple outdoor units and ducts? Imagine you had a ...
Alex's user avatar
  • 125
1 vote
0 answers
71 views

Is my water heater tank system normal?

I bought a heating system a year ago for my house. It is a water heater tank. The hot water inside is heated when the price of electricity is cheaper during the night and two hours in the middle of ...
user avatar
0 votes
0 answers
29 views

circulation implications of removing a hallway header

Sorry for the grainy pics but should be sufficient. The header above the entry to the hallway from the living room is non-bearing and I'd like to remove it. Question about its usefulness tho, and I'm ...
Oliver Williams's user avatar
2 votes
2 answers
2k views

Heat pump not blowing warm air when on heat - puzzling behavior

Config: Ecobee thermostat Lennox setup (furnace, heat pump, indoor coils) Installed for ~6-7 months now Problem: Setting the Ecobee to Heat for 66F (not aux - just using the heat pump) turns on the ...
Den's user avatar
  • 205
0 votes
1 answer
2k views

One radiator is not getting hot (water doesn't seem to flow through it)

Central heating system is Pressurised system with Combi-boiler. My fix attempts so far: Bleeding air out of the one radiator (with a bleed key). Immediately bled water implying no problem. Checked ...
andyandy's user avatar
  • 111
1 vote
1 answer
602 views

How do I switch off the water flow of the central heating?

I have a pressurised central heating system. I am changing the radiator valve by freezing a section of the pipe. I was wondering if I have to switch off the flow of water of the central heating. If ...
james's user avatar
  • 21
0 votes
3 answers
1k views

HVAC air filter replacement interval in hours?

My condo has a central heat pump AC/heater system that takes a 20x30x1 air filter. My area is a very mild climate and the HVAC system rarely gets run. Checking my usage data over the past 12 months, ...
James's user avatar
  • 357
2 votes
1 answer
59 views

Only half of my apartment electric radiators come on

I hope I am in the right to place to ask for help. I am in the UK, have a small apartment with 4 radiators. They look like they are electric (no pipes running to them). This is a relatively new build ...
Sam Leach's user avatar
  • 121
1 vote
2 answers
2k views

Can you get water in a domestic natural gas supply and how would you test this?

We have a mysterious water ingress into our gas-fired boiler. We eliminated rain as the source so the only two options seem to be the condensate pipe backing up, or ingress from the gas supply line ...
Mr. Boy's user avatar
  • 432
0 votes
0 answers
28 views

Does/can a modern indirect tanked hot water system draw heat on-demand to keep itself full of hot water?

In my previous experience with old tanked systems they simply ran on a timer so if you used all the hot water you had to manually boost it to get some more. Using modern boilers and unvented hot water ...
Mr. Boy's user avatar
  • 432
26 votes
3 answers
5k views

Is it possible for a gas fired boiler to consume more energy when heating intermitently versus having heating at all times?

I have an argument with my dad regarding energy consumption of a gas-fired wall radiator home central heating system. Their current setup involves no thermostat and the boiler deciding when to fire ...
KubaFYI's user avatar
  • 373
1 vote
2 answers
142 views

Can a combi boiler be damaged to the point of ruin by 'sludge' in the water?

I have a Baxi combi boiler and over the last 5 years it has had more problems than I can remember. We've had flow diverter valve failures about once a year, replaced both the hot water and main heat ...
Mr. Boy's user avatar
  • 432
0 votes
1 answer
38 views

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 ...
WhisperingShiba's user avatar
0 votes
2 answers
86 views

How can we be more energy-efficient in heating our water? [closed]

We live in a very large, old house (in the UK) with 8 bedrooms, heated by an Ideal Instinct Heat 60 boiler (about six years old) supplying 32 radiators and a 295-litre (65 gallon) water cylinder. With ...
Lee Hill's user avatar

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