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
90 views

UK Vented Heating Problem - F25 Error on Glow Worm Boiler

We have had an intermittent problem over the last 4 months with our boiler cutting out with F22 and F25 errors (circulation fault/air in system etc...). Its a Glow worm Flexicom 18hx and has been ...
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1answer
36 views

How much work is involved to change a conventional boiler to a combi boiler?

We live in a circa 8 year old detached house in the UK. We've been having some problems with our heating system, mainly the hot water tank and we're wondering how much work is involved to change to ...
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1answer
46 views

Why might a central heating programmer no longer override a room thermostat?

My central heating and hot water is governed by a Danfoss FP715 Si. Using this I can set the time each day when the central heating and the hot water come on and off. When the central heating is on it ...
3
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1answer
29 views

Is it legit to turn a dedicated combi bolier supply into a ring circuit with outdoor socket?

I would like to install an external socket. Conveniently located on the other side of the wall where I'd like to put said socket is the combination boiler which has a dedicated supply from the ...
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4answers
6k views

Why is my Central Heating taking so long to heat up?

I'm in the UK with a small modern, well insulated, double glazed home heated by a traditional gas boiler. My heating had been achieving room stat temperature within 30 minutes but is now taking at ...
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1answer
1k views

What could be causing my Lennox furnace to blow cool air?

My Lennox outside furnace is blowing cool air, not hot even when the burner is lit. It takes 3 times longer to heat the house than it should. I just had the draft motor replace about a month ago and ...
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1answer
1k views

What could cause my radiators to go cold when the hot water is turned on?

When only heating is selected on my program timer the radiators all work fine and are hot. But when both heating and hot water are on the water gets hot but all the radiators go cold. When the hot ...
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2answers
45 views

Why does my heating work poorly in moderately cold temperatures?

My house has a gas-fired boiler and hot-water radiators. I've noticed a strange problem since moving in a few months ago. If the weather is moderately cold (in the 30F - 40F range), my house feels ...
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1answer
454 views

Why does the blower in the attic vibrate during heating when it is really cold?

We have a Carrier heat pump system in our home, and the blower is located in the attic. When it is especially cold, the blower runs on high (there are three levels: high, medium, low). During this ...
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1answer
43 views

No heating but have hot water

My hot water is working fine, boiler fires up OK. The problem is that my heating won't switch on. I have a wireless thermostat which appears to send and receive the correct signal as the receiver ...
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0answers
24 views

plusses/minuses of a modern pellet boiler system?

I know someone who is considering one of the Okofen (or equivalent) pellet-fuel systems to replace his house's dying oil-fired boiler. (He's keeping the existing Forced Hot Water baseboard system to ...
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2answers
70 views

Can I install A/C in a home built in 1924 which has round heat ducts in the ceiling?

Can I install A/C in a home built in 1924 which has round heat ducts in the ceiling? I am looking at homes to purchase in Milwaukee, WI. The home seems to have all it's ductwork above the ceiling, as ...
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2answers
71 views

How can I get better HVAC airflow?

I recently purchased my house which was a new construction. Several of the vents are getting poor airflow but the installation company simply said it was normal but I suspect otherwise. I recently ...
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3answers
1k views

Central heating pressure dropping

Some time ago, I asked this question. The problem I had was that the pressure in my central heating system was dropping, and I couldn't find the leak in the system. I'm now convinced that I don't ...
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3answers
88 views

Unplugged computer sparked upon touching a cold heating pipe

First time here, so be kind with me, if this not the right forum to post. I have (maybe) experienced an electrostatic discharge (ESD) from a computer case some days before, and I'd like to hear your ...
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2answers
77 views

Direction of flow in radiator

I am about to install a new radiator in my apartment; we removed the old one without noting the direction of water flow. So I now have two pipes sticking out of the floor and I don't know which is ...
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1answer
24 views

What eats all the electrons — or — understanding household power consumption

In January, our electric bill shows 1685 kWh. In February, 1259 kWh. The bill shows usage back a year, it does seem as if heating season consumes a lot more power than the rest of the year, in spite ...
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4answers
428 views

Does using central heating increase water usage?

Its most likely a very trivial question but central heating systems aren't something i'm familiar with, I've had a good dig around on the internet and cannot find any reference that states that ...
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2answers
55 views

Why is my booster fan pulling cold air from outside?

This is my first winter in a house with an oil-heated, forced air system. I noticed my wall vents were pushing out warm air, but the floor cold air return vents were pushing out cool air. I followed ...
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0answers
28 views

Risk of leakage when changing open-vented to sealed-system boiler

Apologies in advance for the long post. I currently have a gravity-fed, fully-vented central-heating (CH) and hot-water (HW) system (large cold-water tank and expansion tank in the loft, hot-water ...
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2answers
877 views

Furnace Draft Inducer Repair: is previously installed back plate necessary?

I'm replacing a non-functioning draft inducer on the Goodman furnace in my house (GMP075-3). The previous inducer was mounted with a sheet metal back plate between it and the wall of the furnace. ...
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3answers
14k views

Why does my central heating system comes on on its own accord?

Can anyone tell me why my central heating comes on by itself: the radiators get hot and stay hot for around 1-3 minutes then the system turns back off again. This can happen any time throughout the ...
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1answer
51 views

Can I use mortar to fill channels in a concrete floor?

I recently had central heating installed in my 2 bedroom ground floor maisonette. We installed all the pipes in the channels which we dug in the concrete floor. I have covered all the pipes with ...
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6answers
40k views

Gas furnace kicks on then off frequently

A few times in the past week I will wake up to my furnace turning on, hearing a click when it tries to ignite, then turn off. This will happen for a couple minutes before the furnace quits trying. ...
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5answers
133 views

How to Lower the Ouptut of Oversized Furnace

Questions I would like to lower the output capacity of my furnace if possible. How can I do this? Is it worth doing, or should I just live with it? Is there an easy way? Some ideas: replace burner ...
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0answers
25 views

How to add a new radiator/plinth heater into heating circuit? Series or Parallel?

I've just bought an hydronic [sic] plinth heater to go in my kitchen and I'm not sure how to plumb it in. I currently have a combi-boiler central heating circuit with all HEP (plastic) pipe and ...
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0answers
18 views

Heating system is heating the radiators instead of the hot water - why?

We have a heating system with a boiler, hot water cylinder and a controller to set the timers for the heating and hot water which it then switches between accordingly. Lately, it intermittently (I ...
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2answers
51 views

Are my heat pumps using the right amount of power?

I'm trying to figure out if our two heat pumps are being power hogs and if there is something to do about it, or if they're operating normally. We bought our home recently and haven't been in it but a ...
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4answers
24k views

What to do about different rooms in the house being a completely different temperature?

I moved into a 30 year old home last December. There is a problem with the HVAC. I have included a very crude drawing of the floor plan The problem is that I can't maintain a comfortable ...
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2answers
1k views

Hvac Fan only blows in 'fan on' mode while heating

Our HVAC Fan only blows in 'fan on' mode while heating. In other words the fan will not blow in heat mode if switched to "fan auto". Both fan on and fan auto modes work when cooling. See image below, ...
2
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2answers
55 views

Why won't my heater fan come on?

Central-air heater fan won't run, either in Auto or On mode. The heat comes on, but the fan doesn't. Even with heat switched off, the fan should run if I switch it On. The breaker is on, the wall ...
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0answers
52 views

HVAC - hot air flowing on both zones when only 1 zone should be on

I have 2-zone forced air heating, with separate thermostats for each zone. Normally, if the thermostat in zone 1 triggers the system to go on, the heat will only blow through the vents in zone 1. ...
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0answers
21 views

Central heating gas remote controller

I bought a Broadlink RM2 controller that works on 433MHz. How can I control a central heating unit with that? I haven't bought the central heating unit yet but I was thinking at ARISTON CLASS EVO 30 ...
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2answers
169 views

Why is one radiator TRV in the house missing the control?

My house had a new gas central heating system fitted, with new radiators, before I moved in. One radiator (in the tiny downstairs WC) is missing the control knob for the TRV, and is set to the highest ...
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2answers
204 views

Why would a newly installed radiator only heat when on constant bleed?

We have changed a gas central heating radiator. It is the last radiator in the circuit. It will not communicate with the boiler and only brings hot water into the pipe leading to the thermostat when ...
3
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2answers
397 views

Is turning the heater off in absence cheaper than holding a low temperature?

Winter is coming and I live in a badly insulated flat in Germany. Outside temperatures are around 0°C at the moment. When I'm absent for a weekend, should I turn the central heating off entirely and ...
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3answers
1k views

How can I stop our duct work “pinging” at night?

I'm in Canada, and our home is a bit older, ~20 years, and the duct work seems to be making a rather loud "pinging" noise at night. I assume this is due to colder weather in general, and the hot air ...
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1answer
35 views

Need to purge air from every radiatior?

I have a gas fired hot water central heating system. Water is circulated by two zone pumps at the furnace. There is an automatic fill valve. I recently had work done on the heating system, and the ...
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0answers
31 views

What is this heating thermostatic head connection called?

I want to purchase and install thermostatic head for heating radiator valve in my room but can't identify connection type. The radiator itself and valve don't have manufacturer name on it. What is ...
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1answer
111 views

Brass central heating elbow joint leaking at connection to plastic pipe

Since removing a radiator to decorate a room I've had a slow leak in the central heating. Luckily I've found where it is - directly below said radiator - I must have moved it about too much in the ...
0
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1answer
81 views

Is there any way to heat up a space noise free?

I hate my gas furnace so much, because the central heating system is so noisy. So, I bought a portable oil radiator heater, which is a temporary solution for me. It is truly noise free though. But ...
2
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1answer
773 views

Why does my heat pump keep triggering the high-pressure cut-off?

Our Rheem heat-pump is on the fritz. It keeps triggering the high-pressure cut-off on the outdoor unit. We've had problems with this happening before, but only when the outside temperature got to ...
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0answers
46 views

How to cap or close thermostatic radiator valve

I need to remove a radiator from the wall. When I set the thermostatic radiator valve to it's zero position and disconnect the outlet of the valve I get a strong flow of water. The water is ...
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1answer
24k views

How do you trigger the HVAC with wiring only?

I have a HVAC that has the usually wiring C R G W Y Pinouts What wires do I need to connect to turn on Heating? What wires do I need to connect to turn on the A/C? Is there a risk of damaging any ...
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2answers
3k views

What should I do about this Alpha HE CB33 Boiler pressure error condition?

I have an alpha he cb33 boiler which has stopped working this morning. Yesterday I removed a radiator for cleaning then put it back on and re-pressurised the system. It was working ok last night. ...
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0answers
77 views

How to fix uneven central heating and air?

My central heating and air conditioning system does not heat my home evenly. Half of the house gets significantly warmer / cooler than the other half. I have tried adjusting the registers, but to no ...
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1answer
144 views

dripping sound in ceiling when central heating gets warm

I am a complete novice about plumbing so apologies in advance. Basically I have noticed that, when my central heating warms up I hear what sounds like a dripping noise in the ceiling. This seems to ...
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1answer
340 views

Is it OK to use old (30+ years) heating oil in my central heating furnace?

I found old steel jerrycans holding ~50 gallons (~200 liters) of heating oil. They were stored in a place where temperature can go below -5°C. Is it safe to use it for heating? If so, should I mix ...
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1answer
93 views

What could cause my boiler to provide hot water, but not heating?

My boiler kicks in when the thermostat asks it to, but when my room thermostat asks the boiler to fire up, nothing happens. My room thermostat clicks on, and lights up so I think it can tell the ...
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0answers
67 views

Two radiators are always hot

Three months ago I moved to a house with a back-boiler (gas) which supplies the hot water tank and the central heating. Apparently it has been serviced recently. There is a thermostat in the kitchen ...