The boiler is used in a central heating system to heat water that is pumped through pipes to radiators within the home.

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59 views

Can I use a water tank and pump to feed a boiler?

As the title suggests I would like to know if I can use a water tank and pump to feed my boiler? I want to get rid of my electric shower and currently I have large water tank with a pump feeding to ...
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212 views

How do I know if my high limit and low limit are set correctly on my aquastat?

I have a boiler that is only providing heat for my forced hot water baseboard system (4 zones). I've always thought that the high limit on the aquastat was too low (the temperature on the boiler ...
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2answers
45 views

How does a boiler pump circulate water?

I read this article (link) but I'm having trouble seeing how a tiny impeller like this (link) can actually move water up my seven-story building. I understand it's connected to an electric motor, ...
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2answers
394 views

Home heating fuel comparison (wood and heat pumps)

I'm investigating the most efficient way to heat my new 2000 sq home in New Hampshire and am having some difficulty working out the math based on the numbers I have found. I've found that wood is ...
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1answer
86 views

Can I have a washer, electric dryer, oil tank, and oil burner all in the same room?

Is it safe to have the washer and an electric dryer in a basement room with an oil tank, oil burner for water baseboards and water heater?
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2k views

How far apart is it okay to set thermostat during night and day

This isn't home improvement, per se, so please feel free to let me know if there is a better forum for this. I have been told by two people, one of whom is a boiler repair technician, that it's not a ...
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2answers
2k views

Is basement smell caused by oil boiler?

Although dry and not moldy, my 130-year-old basement has a distinct basement smell that bothers my wife. I am trying to determine its source. We have steam heat. In the summer, the boiler is only ...
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1answer
61 views

How to troubleshoot heat that's always on?

My boiler (Weil Mclain CGA Gold ~2003 install) failed the other day. After some help from a plumber and reading the manual, I replaced a few parts (more below) to get it running again. Now one zone is ...
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1answer
50 views

Second floor radiators only heat with all other radiators off

I have 2 rads on the second floor that will get hot water flow only when I stop all flow to the other rads on the system. Even then, the flow is very low. I have had this system for 10 years and ...
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1answer
185 views

Combi boiler lighting hourly to warm heat exchanger - is this normal?

I have an Ideal Isar HE24. It lights for 2 minutes once an hour to warm the heat exchanger and 'optimise delivery time for domestic hot water to taps or showers'... The problem is that this is ...
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1answer
204 views

Could excess water in the boiler cause overflowing radiators?

The water level for my boiler seems to go above the labeled height. We now have a sporadic water leak that is not showing itself. Could it be that the excess water in the boiler is causing this ...
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2answers
6k views

How can I stop the boiler from heating the radiators when only hot water is wanted?

I have Baxi Boiler (model unknown at this precise moment in time) which British Gas have fixed up to a seperate control panel (see image - not our actual panel, image from Google!). The problem is ...
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1answer
1k views

What would cause a gas fired, forced water boiler to shut down?

I have a fairly old Peerless, natural gas fired, forced water boiler. It has an electric ignition system (White Rodgers 50E47-843 Universal HSI Ignition Module). A few weeks ago it shut down (safety ...
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1answer
194 views

Pressure level in central heating system

Recently (since last week), the pressure in our heating system (as indicated by the pressure gauge on the boiler) is dropping rapidly. We're having to top this up around once every two days. As I ...
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1answer
79 views

Gledhill 450 Torrent RE

What is the top pipe connected to my Gledhill Torrent 450 RE thermal store? It comes out of the very top of the tank. Not on the side but right on the top in the centre?
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1answer
114 views

How do we thaw pipes that froze after our boiler stopped working?

Our boiler stopped working. We got it working again and now have hot water but no heat in two zones. Temperatures have been -25°F with the windchill and the plumber thinks frozen pipes. How do we ...
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1answer
66 views

Electric water boiler .. how is the system supposed to work? (UK)

I'm not from the UK and am used to water being heated on-demand by a gas heater. Having recently moved to London, the flat has electrical heating and I cannot figure out how I'm supposed to set this ...
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1answer
28 views

Need help with install for weil mclain oil boiler

I just bought a weil mclain oil boiler with tankless. Can anyone tell me the configuration to plumb it? I asked two heat guys how to plumb it and they gave me different setups. I plumbed it ...
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1answer
150 views

Can I enclose my new boiler in a closet?

As part of a new residential boiler installation, two 6-inch ducts venting to the outside will be installed, one near the ceiling and one near the floor. They won't be attached to the boiler itself, ...
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1answer
26 views

Boiler Temperature in oil system

Our complex winter-summer boiler control unit for an oil-fired forced water heating system frequently calls for a temperature that the boiler never achieves on a cold day. The burner will turn off ...
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1answer
513 views

Radiators don't heat up evenly, and am missing an Expansion Vessel. Do I need it?

I have a new Worcester 40CDI Regular Boiler that does not come with a built-in expansion vessel. I just discovered that the installer did not install an external expansion vessel either. For HW, I ...
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2answers
199 views

Shower water temperature problem?

My house contains 3 showers. Two of them warm up to where it's comfortably warm and one just warms up to a point where I don't freeze. Even if the shower is on the highest setting it still is not warm ...
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3answers
1k views

Combi boiler doesn't realise it's already lit

I have an Ariston Eurocombi (A23). The problem is it doesn't realise the flame is lit. When I start it up and cause demand (run hot tap or turn on heating) it fires up the flame correctly, however, ...
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2answers
117 views

How do I plumb radiators in an off grid cottage?

I have a cottage that is off grid. I want to plumb radiators on it that wont use a pump, or minimise usage of a pump if at all possible. What is the best way to do this? Hot water tank is raised to ...
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2answers
3k views

Can a boiler water feed / pressure relief valve be repaired?

I am a homeowner trying to troubleshoot my hot water boiler system (Winkler Gas Boiler). I noticed recently that my boiler is reading zero pressure. The combination fill & pressure relief valve ...
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2answers
532 views

Thermostat / Oil Furnace Question

I have an old oil furnace and I am looking for some clarification as to how it is supposed to work. It heats water filled radiators through out the house. Currently it is connected to a thermostat ...
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1answer
225 views

What does the low limit do, and where should it be set on an oil fired hot water furnace?

What does the low limit do, and where should it be set? My furnace has a honeywell triple aquastat relay and has a difference dial. Water temp is about 190 deg F. Also, water psi gauge is only ...
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1answer
298 views

Why won't my propane boiler's pilot stay lit after replacing the thermocouple?

The pilot on my propane boiler won't stay lit for more than 30 minutes even after replacing the thermocouple and outside gas valves. The inside gas valve was replaced two years ago. Service people ...
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1answer
867 views

Can having two expansion tanks above a boiler cause it to over pressurize?

I have 2 expansion tanks on my hot water boiler. One tank is a newer model located above boiler. The second tank is hanging from rafters just above boiler. Is it possible that both tanks are filled ...
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2answers
692 views

Sizing DHW expansion tank for tankless heater

I have a combined boiler for hydronic heating and DHW. Earlier in the winter, I started insulating as much of the pipes I can easily access. This has led to hot water coming out of the cold water ...
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1answer
103 views

Is it possible to relocate my water heater?

I'm planning a complete refit of my bathroom, hopefully converting to a wet room, and I just wanted to get some idea of my options. The bathroom is (sadly) very small, around 1.7m x 2.3m. This is not ...
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211 views

How can I tell if C wire is active and connected to Thermostats?

We are trying to install a smart thermostat (Ecobee 3) so we are in need of a C wire from our boiler. We see a green wire in the wall, but it's not connected to our thermostat currently since it ...
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1answer
74 views

How can I reset my Baxi Combi Duo-Tec HE boiler after a gas supply fault error?

My boiler is giving me some real problems, for whatever reason, it's not resetting as it should. I ran out of gas last night and since ice put some on and tried to reset, it still thinks there is a ...
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1answer
93 views

Represurise Vaillant Turbomax gas boiler - turning filling screws, but won't fill

I have a Vaillant Turbomax boiler (unsure of exact version as I don't have the manual). The pressure is a little low so I'd like to refill. I've followed these instructions: ...
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58 views

What can I do if my wood boiler keeps tripping the high limit switch?

I just installed a outdoor wood boiler and added 2nd thermostat in house. When I start wood boiler the high limit switch gets hot and trips. The only way I can keep it going is to put a jumper wire in ...
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28 views

How can I reduce the noise from an HE boiler vent?

I have a HE boiler that is direct vented out the side of my house on the neighbors side, they find the 'roar' of the exhaust to be very annoying. Have anyone tried troubleshooting these to ...
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217 views

Why would a gas boiler ignite then go out shortly afterwards?

I have a Potterton Promax SL High Efficiency boiler. Am having bathroom refitted and at present the bathroom radiator is disconnected. Following this the boiler now lights then immediately goes out ...
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103 views

What is the effect of differences in flow and return rates in a traditional gas central heating system?

Would a smaller or lower differential in flow and return rates in a traditional gas boiler "Y" central heating system make the house take longer to heat up? Is there any way to adjust these flow ...
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87 views

How should I replace these pressure reducing valves?

At my church, we have a fairly old boiler system. The system was just passed for annual inspection, but it is failing to refill after having been drained. There is absolutely no water flowing past the ...
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98 views

Why am I not getting hot water from my tankless hot water heater?

I just bought my house last year. The previous owner had just replaced the boiler before I closed. I had oil delivered the day that I moved in. I had problems with the hot water right away as it ...
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70 views

How do I set the timer for a Baxi Luna boiler?

I cannot set the timer for a Baxi Luna boiler. I have tried everything. The heating will come on and off but not on the timer.
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1answer
762 views

Potterton EP3000 programmer HW and CH buttons not working

I've got a Potterton EP3000 boiler and the programmer won't respond to me pressing the HW and CH buttons. It was working fine until I switched off the power to the plugs (to do some electrics). After ...
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2answers
58 views

Metering gas used for heating water in a multi-dwell building with one boiler

I rent in a multi-dwell building. We are not directly charged for hot water but trying to figure out if we are indirectly charged via the Con-Ed gas bill. Is it possible to meter gas usage for the ...
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3answers
5k views

Why don't my Radiators get hot?

When I turn on my heat, the pump attached to the boiler comes on but the pipes don't get hot and the radiators never do either. I've bled them and believe they are hot water radiators (since there ...
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2answers
1k views

Do I have to replace my expansion tank, or can it be drained?

I have no heating. My plumber tells me that my expansion tank has water in it and should not be hot and therefore needs replacing (expensive job). is this true. Can the water not be drained out? ...
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2answers
551 views

Should I replace my Pressure Reducing Valve?

A few weeks ago, my oil-fired water boiler started continuously leaking water out of the pressure release valve on the top of the unit. I know this is leaking steadily because it drains into a 5gal ...
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1answer
168 views

Are uninsulated steam pipes behind walls and touching beams a fire hazard?

We are getting our unfinished basement done. We have replaced and rerouted (to make more space) our steam pipes (house built in 1937) with new pipes (Black and I believe 4 inches in diameter). These ...
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1answer
26 views

Does C&M MX24 have a constant pilot light?

In disputing the reading that our gas meter has in a usually empty property, British Gas are claiming that every boiler has a permanently lit pilot light. I'm pretty sure that isn't the case with some ...
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3answers
328 views

How to accurately judge economics of converting from oil heat to liquid propane?

I have an oil boiler in my house (boiler and burner about 27 years old) and, as part of a renovation project, I may upgrade to something more efficient. I thought I would have to stay with oil because ...
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1answer
138 views

Would connecting the downpipe to a gas boiler inlet save energy?

I have a condensing gas boiler for tap-water and central heating. Not very far from the inlet there is a downpipe outlet for the sewer. Since this smelly pipe is partially filled with the same ...