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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9 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
39 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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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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33 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
25 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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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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13 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
29 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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18 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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24 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
60 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
55 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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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
29 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
78 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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42 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
31 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
41 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
32 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
64 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
41 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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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
16 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
31 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
132 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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27 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
58 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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82 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
122 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
37 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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2answers
117 views

Is storing hot water over 140F a regional requirement?

It seems to be "common knowledge" that to help prevent Legionella, hot water tanks/heaters should be set at 140F. This temperature is enough to cause terrible burns and scalding so devices like ...
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3answers
461 views

How do I fill a hole surrounding a boiler flue?

The flue for my boiler has a large hole around it, presumably from when it was put in. I'd like to fill it in because it's unsightly, but in not sure of the best way to do it, as it's a large hole and ...
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180 views

Thermostat Upgrade, furnace C-wire reading low voltage

OK so here is the scenario. Upgrading thermostat from dumb to smart (Ecobee). I've done 2 others in my house that required re-wiring so I have a good sense for what should be done but I'm stuck. My ...
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2answers
201 views

29 volts too much for a 24 volt thermostat?

I replaced a digital non-programmable thermostat with a programmable thermostat and the new thermostat keeps the house around 60-62 no matter what temperature I set. When I contacted the manufacturer,...
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2answers
115 views

Does the circulator in an indirect fired water heater point towards the boiler or towards the tank?

In the manual for my SSU-119 indirect fired hot water heater, the following text seems to suggest that the circulator points towards the tank: On the water heater, the boiler supply connects to the ...
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3answers
68 views

Boiler PSI is at 35 how to reduce it on a Burnham 204 gas installed 2000

I have high boiler pressure at 35 with no noticeable pressure venting, that’s probably a broke value and I don’t know how to reduce it.
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1answer
16 views

High elevation non- pv Burnham boiler with Tejurland powerventer installed at sea level [duplicate]

I have a 203ncl-tei2 boiler installed in danvers Massachusetts. This town is at sea level, not 2000k miles up. This boiler also has a failed tejurland (universal control) powerventer motor on it that ...
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26 views

U.s. boiler / Burnham boiler alterations

i have a 203ncl-tei2 boiler installed in danvers Massachusetts. Regular elevation. This boiler also has a failed tejurland (universal control) powerventer motor on it that is only humming, not ...
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1answer
34 views

How can I control my furnace fan from a secondary thermostat?

I have a WaterFurnace geothermal system with upper and lower level zones. I recently added an outdoor wood burner and my issue is that I want to use a secondary stat to run the furnace fan during the ...
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1answer
75 views

Can a C wire be added to an old Teledyne Laars JVT-100C boiler?

Good morning. I have an old Teledyne Laars JVT-100C Boiler, that only has R,W,A terminals. is there a way to add a C wire to this boiler in order to power my thermostats? Thanks in advance...
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2answers
55 views

How do I know when a water heater's relief valve should be replaced?

My relief valve has been leaking lately. It looks like its not working right. How do know when its not working right? Its leaking from the end of the pipe the spring seems like its not working right
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10 views

Oil Boiler - Pressure Valve leaking even after replacing Expansion tank

my oil boiler has a mawp of 30 psi and the old expansion tank was 18 psi rated, when i started noticing that pressure relief valve has started leaking 2 gallons a day, i notice the expansion tank had ...
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2answers
45 views

Radiators no longer heating up after cold weather

I have a Worcestor Danesmoor boiler that lives in a stone outhouse and heats the water and radiators in my house. The heating is set to come on at certain times of day, but during some recent cold ...
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10 views

Combi boiler pressure drop - even after expansion vessel has been emptied and recharged

Recently had an issue with my ~5 year old Baxi Platinum HE 24 combi boiler. Pressure had dropped and needed topping back up 3 times a day to retain pressure and not get any errors. Got a heating ...
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357 views

C-wire on Weil-McLain CGA Series 2

I have an old thermostat with only 2 wires connected to my Weil-McLain CGA Series 2 boiler. I would like to replace it with a Nest thermostat. I need to add a C-Wire in order for it to work. Luckily, ...
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1answer
144 views

Can't get wifi thermostat to work with gas boiler

I bought a Sensi WiFi thermostat and I have been trying to install it. I can't quite figure out how this wiring should work. Here is a link to pictures of the boiler and the current thermostat. The ...
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1answer
454 views

How to connect c-wire to Burnham Series 2 boiler?

I am trying to install my ecobee 3 light but the previous thermostat did not use any c wire. Fortunately, there was an unused wire in the wall and I would like to set it up as a c-wire. The problem is ...
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1answer
34 views

Leak in boiler system

Have concrete slabs heated with an HTP boiler. 4 manifolds (2 supply, 2 return w/shutoffs). Had a loss of pressure and low water pressure error on boiler. I have isolated the leaks off the manifolds. ...
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1answer
84 views

how to connect C wire for ecobee lite to Weil-McLain EG Series-5 gas steam boiler

I want to upgrade from a battery powered Honeywell thermostat to an ecobee3 lite. This is for heat only. My current Honeywell has two wires: Red and White. Missing is the C cable. There are enough ...
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1answer
210 views

Zone Controller T-Stat Wiring w/ 24V transformer, isolation relays for 2 zones

I have a new Navien SmartZone+ 6-Zone Control for my boiler-based heating system. It is great, except it provides no power on C. I realize the internet has researched the heck out of adding a C ...