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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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1answer
43 views

hot water, baseboard oil boiler - bleeding at boiler site possibility?

I may replace my current oil, baseboard boiler but would prefer bleeding the system at the boiler site (if it's possible) vs at every room separately. Is it possible to bleed air out at the boiler, ...
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5answers
2k views

Why does hot water only run for 30 seconds in bathtub?

In the bathroom of this rental is a tub with a shower diverter. It's an older setup with a hot & cold faucet and a center valve (one direction diverts to shower, the other to the tub faucet). If ...
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1answer
48 views

Water boiler system keeps freezing

In my house the ground floor (not basement) heater zone is freezing and pipes are breaking. Apparently this is because we run the wood-stove, and it keeps the thermal sensor high so the boiler won't ...
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1answer
14 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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1answer
21 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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0answers
45 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
45 views

Do I need to prepare my boiler for the water being shut off at mains?

We have a brand new boiler and hot water heater. The city is turning our water off at the main for approximately 6+ hours for maintenance. Do I have to do anything? They’re both run on natural gas. ...
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0answers
120 views

Strange Pin Pierced Pipe in Boiler

Just wondering if anyone had any ideas on this? The other day, I put the central heating on for the first time in about 6 months. The radiators did not get hot and within a few minutes the boiler ...
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1answer
562 views

Wiring a C (common) wire to a Triangle Tube Prestige Excellence 110?

Wiring noob here. Can someone give me step-by-step instructions for where and how I should attach a C (common) wire to a Triangle Tube Prestige Excellence 110 boiler for a ecobee3 thermostat? I think ...
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1answer
668 views

Honeywell VR8300A3500 Single Stage Heat Gas Valve to Ecobee3 with C wire

Hey everyone have a quick question regarding a honeywell VR8300A3500 Single Stage Heat Gas Valve and the introduction of a Ecobee3 wifi enabled thermostat with a "C" wire. just want to make sure i am ...
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1answer
21 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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1answer
1k views

How should I increase pressure in a Glow Worm Micron 50FF?

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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1answer
529 views

Nest E thermostat on ancient 2-wire Bryant boiler system with 2 zonesq

I have a 2-zone hydronic system running off an ancient Bryant boiler. Power is supplied by a 24V transformer, and each red wire passes through a Taco zone valve before heading off to the appropriate ...
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1answer
200 views

Should an auxiliary circulation pump be installed on the supply or the return?

I'm adding a new 007 Circulator Pump for closed loop system. Problem is that one of the radiators on a third floor does not heat- tried purging air (it's a new added radiator). It gets hot when I ...
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1answer
167 views

How to connect wifi thermostat with a boiler after cable upgrade?

I have an old battery operated thermostat right now with two wires (18/2) attached to it running to a boiler. No AC, fan, etc.-- just a boiler. I can easily replace the wire with 18/5 one, however I'm ...
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2answers
2k views

Nest thermostat - combi boiler and UFH set up question

We recently had some work done, a new open plan room, a new boiler and underfloor heating (UFH) put in. We had some confusion, a lot of which comes from not having a basic understanding of how the ...
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1answer
221 views

How to handle unattached ground wires in boiler fusebox/control panel (sub-panel?)?

I don't have enough of an understanding of HVAC to know if the pictured boiler fuse box is considered a control panel or a sub-panel - but some wiring issues there lead me to needing to understand ...
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3answers
194 views

How do I bleed a noisy radiant heat system?

I have a gas fueled (converted from oil just a few years ago) boiler in my basement with an integrated tank-less water heating system for the showers/taps/etc. The output is three zones as shown in ...
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3answers
937 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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2answers
30 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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2answers
97 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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1answer
28 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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3answers
81 views

Can I reverse my heating zone?

I have a three zone hot water boiler based heating system. The boiler is currently at one end of my ranch style house. The radiators appear to be directionless (no valves or anything). One of the ...
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3answers
76 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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1answer
24 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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0answers
31 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 ...
3
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1answer
249 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 heated water baseboard system with 4 zones. I've always thought that the high limit on the aquastat was set too low. The temperature on the boiler ...
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2answers
10k views

Ariston boiler with 108 error code

I have an Aniston gas boiler. It's displaying error code 108. After Googling I found it's because of the low water pressure. Other forums indicate I should open the water valves underneath until the ...
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3answers
41 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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2answers
68 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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1answer
86 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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5answers
654 views

Use small UPS to power steam boiler

I have a steam boiler (natural gas fired) and I'm wondering if I can safely use a small UPS to backfeed power to the boiler, in case of a power outage. I'm not sure how much total run time I'd get - ...
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0answers
23 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
15 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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1answer
2k 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
39 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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2answers
54 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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0answers
9 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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0answers
118 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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2answers
41 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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1answer
29 views

Multiple boilers, one expansion tank and fill mechanism?

For a building with two boilers serving separate apartments, I'd like to simplify my design by having only one auto-fill and backflow preventer, and only one expansion tank. These are combi boilers ...
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0answers
8 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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1answer
29 views

If I only want to pressurise central heating not hot water should I get a regular boiler or system boiler

My boiler has packed in, the heat exchanger has failed and the consensus is that was due to sludge, gunk in the system, also consensus is would be better to pay a bit more and get a new boiler and ...
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2answers
182 views

Boiler vent and expansion tank leaks

I had my boiler inspected and cleaned recently and the tech found a few issues. He showed me how the valve on the expansion tank would leak when he would push it in, which means the tank needs to be ...
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1answer
41 views

Leak from valve on boiler - what should I do?

I have this valve which we use on the boiler to increase the pressure but it has just started leaking and is dripping through our ceiling. Can anyone suggest what I need to do to stop the leak?
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1answer
81 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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2answers
31 views

Boiler Combi 24 pressure indicator always point to 0

I have a Boiler Combi 24 (UK) and this morning I just noticed that the pressure indicator is pointing to 0. However everything is working fine, I have heating and hot water. Usually when the ...
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1answer
57k 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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1answer
31 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
4k views

Repressurising Logic Combi 24 boiler

I bled a rad that was cold at the top, and not much water escaped. This fixed the rad, but the pressure in the boiler dropped to just below 0.3(It may have been low to begin with, since I hadn't ...