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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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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22 views

Boiler heating extra zones

Background: This is a new house, with a boiler system I'm not familiar with. Instead of zone valves, each zone has its own pump (4 zones). There is a fifth pump on the other side of the boiler. Not ...
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1answer
49 views

Glow worm micron 50ff — re-pressure?

My Glow Worm Micron 50FF boiler's pressure was yesterday reading at a pressure of 1 (mbar or PSI -- not sure which) but the red fixed line shows as 2. I had a look in the manual and it suggested that ...
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75 views

How to test Honeywell aquastat L6006C?

my circulator pump isn't working properly with my boiler system, trying to narrow down problem. I've read you can test the aquastat with a multimeter (which I have but have never used). The reason I ...
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89 views

need help with completing Zone, Thermostat and low pressure wiring for a Alpine Boiler ALP150

i have completed most of the connections to the boiler expect for Zone values, Thermostat and low pressure monitoring. i need help with understanding if i need to purchase a 24v transformer ? and ...
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465 views

How to repressurise a Baxi Duo Tec Combi 24 HE boiler

I'm currently having trouble trying to repressurise my boiler. Unfortunately, the YouTube tutorials and the manual look different to mine! I've also added photos below to help. Any help would be ...
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983 views

Can I have a separate thermostat for a wood boiler?

I want to wire a separate thermostat for my outdoor wood boiler so that just the furnace fan will come on without the propane kicking on. This is a Coleman furnace. Is this possible and if so, how ...
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Can baseboards be used in one pipe steam heating system?

I just switched to natural gas and had a new Weil-McLain steam boiler installed. (I originally had an oil boiler with steam heat.) It is a one pipe system and I have the old style radiators, except ...
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102 views

Why would the input gas pressure fall when the central heating boiler calls for heat?

Since the annual service of my traditional gas boiler the house takes considerably longer to heat up. The boiler flame no longer seems as "fierce" as previously. I'm told the burner pressure and ...
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66 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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222 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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25 views

Hydronic Heating: Noisy pipes in the basement/walls

My issue is i have a natural gas boiler + hydronic heating system (two zones). It seems that after I remove air from each zones, the heating system is quiet until 12 hours later. In the early morning ...
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25 views

Hot Water Baseboard is not hot, when purging out air, very little water comes out.

The Boiler is at about 20 psi on heating pressure gauge but I'm not getting heat through the base boards. I have 3 zones fed with 3 circulating pumps, one for each zone. On the return I have 3 ball ...
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82 views

Why would my boiler's pilot go out after the hot water comes on?

I have a Potterton Prima 40B conventional heat-only boiler that was installed in 1999. The pilot light goes out after the hot water comes on. It will stay on if the heating is on, but about 2 minutes ...
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25 views

How effective is elevated concrete for insulating moisture?

I am replacing a boiler in my basement and the contractor told me it will be better for the new boiler if he build an elevated concrete platform on which the new boiler will sit. He says this will ...
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311 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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81 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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36 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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257 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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122 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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0answers
114 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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106 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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77 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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Are all boiler heating systems closed?

Are all boiler heating systems closed? In other words, are they all filled with water that is just constantly recirculated, or are there some that put the outgoing water elsewhere?
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Heating Not working but heating water kicks it in

My heating (gravity fed) is not coming in when the timer starts but the if the water needs heating it kick starts it. I thought it may be a thermostat issue because when I moved this to a point that ...
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42 views

How can I check if my boiler room thermostat is working?

I have an old Honeywell basic thermostat and I am not sure if it's working properly or not. I doubt it because the boiler stops burning after some time even when I set 30 °C on the thermostat and ...
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282 views

Vaillant ecotec 28 boiler pressure problem

I have a Vaillant ecotec pro 28 boiler and the pressure is too high when the heating or hot water is on. It flashes at between 3.2 and 4 bar. After searching online the suggestions were to vent any ...
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hydronic baseboard freezing problem

When using a woodstove, the hydronic heating system never kicks on. That can lead to frozen pipes in uninsulated walls. I've heard of Thermogaurd, but its not a smart system, i.e., it uses a timer ...
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42 views

Can a gas safety check be carried out when the boiler will not light?

My gas safety check is due and my landlord has said it has to be done on Saturday I've had issues with the boiler not lighting for a long time, but usually if it is left for a while it will ...
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106 views

Replacing drywall above boiler… to Code? Inspection?

I own a mid-1800's house in New England, with a fieldstone foundation and dirt floor basement. I now have a mold problem in the basement. There is lone sheet of drywall above the boiler & water ...
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1k views

Water not circulating in one radiator on a hot water boiler

My boiler has 4 zones. Zone 1 is the bottom floor. There are two radiators in zone 1. I am replacing one of them, an old baseboard radiator, with a cast iron with similar BTU. We hooked up the new ...
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826 views

What might cause the heating to get “stuck” off regardless of room thermostat?

What could cause my heating system to get "stuck" in a state where the boiler will no longer come on in response to the room thermostat, and I can only seem to "fix" it by turning the property power ...
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168 views

What could be causing my boiler not to work?

One of the wires on the roll out switch got burnt, so we taped it together as a temporary fix. It worked for a while then both got burnt and the system shut down. Could the problem be the roll out ...
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269 views

Why isn't water running through our radiators?

We had a plumber in today to bleed our rads. He also changed the batteries on the thermostat and fiddled around with the boiler. Since he left the temperature has dropped dramatically and he's refused ...
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333 views

How can I determine why there is no water coming from my hot taps?

I'm getting no water from any of the hot taps in my house. The cold water taps are working fine. The central heating is also working. I have a combi-boiler. It's been fairly cold today in London, so ...
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118 views

How to deliver hot water from bathroom to kitchen

My appartment (and all my neighbours as well) doesn't have hot water. So I recently purchased electric boiler (80L) and placed it in the bathroom. Now I'm planing to deliver the hot water from the ...