Questions tagged [boiler]

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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21 views

Need to drain boiler expansion tank but no drain valve

Been having intermittent banging during heating season. It happens around once a month and the whole house shakes. The gas company believes that it's a bad expansion tank. The old-style expansion tank ...
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1answer
29 views

Can’t shut off power to heat-only (hydronic baseboard) thermostat

I have no AC in my condo, only hydronic baseboard heat, currently controlled by an old mercury thermostat. I have a new smart thermostat with a c-wire adapter I want to replace it. Trouble is, I’ve ...
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1answer
40 views

Thoughts on furnace generator transfer switch install

I'm replacing my cast iron boiler for hydronic heating and domestic hot water in Massachusetts. Plans are to install a new Viessmann gas fired condensing boiler. Living in New England, it's not out of ...
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55 views

Noisy circulator pump

I live on the 4th floor at a 9-story building (60+ units in total). For the last few months I have been hearing an annoying humming / whining noise. After some inspection I realized that the source of ...
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2answers
34 views

Is there a recommended size for vents in boiler cupboard doors?

I have replaced doors in my house and would like to replace a plain boiler cupboard door — standard 1981mm x 762mm (6½ft by 2½ft) door — with a 6-panel door matching the ...
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1answer
21 views

Will old cast iron Baseray baseboards work with a steam boiler?

forgive me if this question is amateurish. We recently removed some old cast iron Baseray baseboards from a house which were being heated with hot water. I'm wondering, can these baseboards be used ...
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4answers
68 views

Thermostatic control of an unmanaged energy source to supply hot water cylinder

I have a solid wood burner that contains a heat exchanger. There is no guarantee that the combustion can be regulated. This heat exchanger feeds a loop that acts as the source heat exchanger in a hot ...
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3answers
61 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
45 views

Checking my understanding - How to add C-wires for smart thermostat install x3

I'm in the process of installing some smart thermostats (Nest Thermostat E) to replace my old ones. I have a boiler radiator heating system with three zones. Two zones are straightforward heat only (...
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1answer
43 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
53 views

How can I improve recovery time of my hot water baseboard system?

I've just purchased a 15-year old house heated with a gas boiler and multiple baseboard zones controlled with zone valves. The house is built to be energy efficient, and I have no doubt that there'...
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21 views

Wiring c wire to current valve controller

I am looking to hook up a wifi smart thermostat and realized while I have 3 wires hooked up to my old thermostat, the common wire is not hooked up to anything in the basement. I'm wondering if I can ...
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2answers
87 views

Is it okay to insulate some but not all steam pipes coming from boiler?

I have a Slant/Fin boiler with un-insulated pipes in the basement. The previous owners of the house finished part of the basement and covered some of the pipes behind drywall in the ceiling. Is it ...
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1answer
30 views

Boiler only runs for 4 minutes then shuts off

I have a Slant/Fin boiler that's attached to a old White and Rodgers thermostat, typically the boiler only runs for about 4 minutes before it shuts off. This small period isn't really heating up our ...
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29 views

Gas Boiler Electric Flow Chart

I am looking for a flow chart that shows what happens when a gas fired hot water boiler thermostat calls for heat the power goes from the thermostat to the ? and then to the ? and so on
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34 views

Boiler Zone issue after thermostat install

I just bought a new to me house, built in 1970. I replaced the old mercury thermostats with new programable digital ones. They worked great for the first 12 hours. Kept and read temps like it was set. ...
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2answers
36 views

Oil burner runs for at least one cycle then safety locks out

I have an older Slant Fin Liberty oil furnace that safeties out sometime around 4 hours. It seems to be intermittent because I have seen it do more than one cycle. The recent history on it is about a ...
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18 views

Issue Installing Ecobee 4 on 4 zone boiler with Aquastat

I have a 4 zone valve boiler system. Each of the zone valves is Honeywell. I have a 24-volt transformer along with an aquastat. I have attached a photo of the wiring diagram from what I can tell ...
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1answer
31 views

Can an expansion tank described as for a water heater be used for a boiler system?

There is only one expansion tank we can find which states it is also a thermal expansion tank but it says it protects hot water heaters
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30 views

Connect boiler Wifi switcher

I want to connect boiler switcher, in the wall I have 4 wires, 2 live, neutral and earth, but on the wifi switcher it needs L(in) L1(out) N1(out) N(in) as shown in the pictures, How can I connect it?
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1answer
39 views

Purging boiler with just one drain valve

I have read through how to purge a zone, but I still have a question. I don't have individual drain valves on each zone. So I am unsure what the process would be in order to purge a zone. And to ...
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3answers
44 views

Electric Boiler System won't get warm

I moved into a new rented property about 3 weeks ago in the UK. I put on the heat, which is water-filled radiators supplied by an Electric Boiler, a Range Senator 6W, and a medium-sized water cylinder....
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1answer
40 views

Boiler Valve Corrosion

I have a hydronic heating system in my house, and I noticed a valve on a pressure gauge on the side of the boiler is extremely corroded (see 3 pictures below). 1) Is there any purpose for this valve ...
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1answer
38 views

Are Quick Connect Shark Bite Connectors Safe to use with a Boiler?

I have a section of piping I want to clean up, and while out to buy some supplies to practice my pipe sweating I found out about Quick Connect Shark Bite connectors. I was told they work for both ...
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1answer
30 views

Replacing thermocouple with thermopile

I'm having huge issues finding a replacement thermocouple for my Kenmore 153332421 boiler. It seems that Sears is the only place to get them. I ordered one a couple of days ago but after receiving the ...
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11 views

Purged Air from Heat Zone, Still Hear Rushing Water

I have a three zone hydronic heating system. The radiators do not have bleeders but there is one on the air scoop by the boiler. I heard rushing water in one of the zones so I replaced the auto vent ...
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23 views

Boiler leaking from hy-vent with pressure drop

Today was a warm day so I turned off our hot water boiler. About two hours later, I noticed a good amount of water had leaked. I assume it was from the hy-vent because it looked like it had dripped ...
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1answer
34 views

Combi boiler not producing enough hot water

I have a Gloworm flexicom 30 cx combi boiler and when you run a hot tap or shower it only produces hot water for a minute or 2 then runs cold . Sometimes it error codes F25 . My local heating company ...
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21 views

Can a Glowworm 18sxi boiler with a water heater tank be converted to combi?

We have a Glowworm 18sxi boiler, with a large hot water tank in the airing cupboard. Currently, the only way to heat water is to set it on timer, or if the hot water has emptied, we can press the ...
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25 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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1answer
70 views

Where to connect C Wire to1990 Weil Mclain Steam Boiler

I am attempting to run a new 18/5 line in order to hook up an Ecobee 4 to my Weil Mclain boiler, as my current thermostat only has a R & W wire. I am having trouble figuring out where exactly to ...
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2answers
73 views

Boiler heating gauge drops to negative pressure (psi) on cooling

I just moved into a older house (1937) which has a boiler heating system (steam). When the boiler kicks on the gauge barely goes above 0 psi, and after heating the gauge will drop to about negative 5 -...
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7 views

Boiler Vaillant ecotec 831 R1 plate heat exchanger compability

I have a Vaillant ecotec 831 R1 boiler with original plate heat exchanger(hot tap water). My heat exchanger got damaged and I would like to replace it. On ebay I have found a there is a bigger(more ...
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1answer
37 views

Gas combi boiler removing radiator

I'm doing some decorating at home and needed to remove the radiator. I still need to be able to use the gas heating throughout the house while the radiator is off. I closed the TRV and lockshield ...
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2answers
92 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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68 views

What does the Bearing Plate in a Worcester boiler do?

Recently our Worcester Greenstar boiler became unable to start. The solution turned out to be that the plastic flaps on the bearing plate had degraded and fallen apart, so the plumber simply removed ...
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1answer
38 views

Boiler pilot not lighting up

I was unable to get pilot lit by pressing button and using lighter. So I tried my torch on the thermocoupler and turned the gas knob on and it came on, hence the picture. Yet the pilot light still is ...
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1answer
48 views

Solder debris in multi zone hot water baseboard boiler heating system blocking valves

I do not know how old the copper piping for the hot water heating system is. We purchased the house in 1977. We replaced the furnace with a Peerless Pinnacle boiler in 2006, included an integrated ...
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1answer
38 views

Honeywell aquastat L8124L install

I am planning to replace the erratic aquastat in an oil-fired furnace. I was able to get the exact replacement model-L8124L. Does it require shutting off water to the tank and priming after the ...
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2answers
130 views

Does my mechanical room need ventilation to the exterior?

Sorry for the confusing post. I don’t have a manual as the prior owner didn’t have it. If I understand correctly, a boiler room in a residential home requires a vent for fresh air. This boiler room ...
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1answer
50 views

How can I figure out if a Combi Boiler will be adequate for my house?

We recently moved into our new home that currently has a Super Hot MG-100 Hydronic Boiler (installed in 1986, when the house was built). Clearly, it's done its job and in need of a replacement. We had ...
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0answers
29 views

Using existing hot water vent for extraction

I have a room in the basement with equipment (computers) that gets really hot. There is an ac vent but the thermostat is nowhere near the room. Also in an alcove is the hot water heater behind a ...
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1answer
22 views

Adapter for NTC boiler probe

I just bought a replacement NTC probe for my boiler (bought with specific part number) but once the item arrived I noticed the connector wasn't matching. I think this is due to past maintenance when ...
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2answers
36 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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4answers
136 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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32 views

Boiler not circulating

I have a Bosch 30 HRC boiler. Yesterday, I added water to the system, increasing the pressure from 1 bar to just below 2 bar. I vented each radiator in the house to bleed the boiler. When I open the ...
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1answer
88 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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0answers
114 views

Why do I measure 12VAC on old thermostat wires?

I'm installing a nest thermostat in my house - it's the UK version with a heatlink. I have successfully wired the heat link into my combi-boiler, disconnecting two existing wires in the process. I ...
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1answer
236 views

Keston C36 Combi boiler - Error E37

According to the boiler manual E37 Water pressure error - You must top up the water pressure for your system When opening the fill loop valve to add water pressure, water flows out the exhaust ...
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1answer
68 views

Use CLR to clean stuck bleeder valve

I was bleeding the air out of hydronic heating zones and I notice some mineralization on bleed valve attached to my air scoop. I took the Schrader valve cap off and tapped the valve I noticed it was ...

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