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.

108 questions with no upvoted or accepted answers
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33 views

Should condensate pipe go below vent and how?

Need to lay condensate pipe from the boiler room to the waste pipe, on the other side of my flat. Will use condensate pump and use loft as proxy. I want to drill through ceiling from my boiler storage ...
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334 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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2k 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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1k views

Boiler issue diagnostic steps for a layperson (E37/E99)

I'm having some boiler woes which seem to have stumped my landlord's plumber, and I'm wondering if there's any clues people more experienced with this setup may recognise, or any recommended ...
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109 views

Loud buzzing from hydronic gas boiler

I have a 105K BTU Raypak radiator boiler, similar to this one but a slightly older model (I guess mine is about 15 years old). The boiler heats and pumps hot water to 8 radiators throughout the house. ...
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91 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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20 views

How to calculate heat loss for sizing of supplemental heat source?

If a home uses a supplemental heat source such as electric baseboard or hydronic panel radiators to raise the room temperature by 10 degrees, how do you calculate the BTUs required in a given room? I ...
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24 views

What purpose do the extra wires for my boiler thermostat serve?

I am pulling out an existing wood burning boiler, EKO Biomass 40, and replacing it with a Switzer boiler. This boiler will be my primary and I have a secondary oil-burner in my basement. The heating ...
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56 views

Thermostat calling for heat but brand new Taco Zone Switch not opening?

I have a trusty old gas boiler that succeeded at providing baseboard heat to 2 zones for years. I recently had a third zone added. This is a 2-wire, heat-only system. The electrician tried and couldn'...
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2answers
43 views

C wire possibly on my boiler/heat pump

Hey so I know this is annoying and asked way too often but the wife wants a WiFi thermostat and of course I don’t have a “c” wire hooked up and there is no “c” terminal on my control board. We have ...
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1answer
58 views

Adding a C wire to Lochinvar Boiler - 2 zones

I am trying to connect an ecobee which requires a C wire to my 2 zone heating system - boiler is a brand new Lonchinvar. My current thermostat only has a red and white wire (I have no AC, just heat). ...
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455 views

Hive Wiring Advice - Combi Boiler

I've just moved house and am trying to wire up the hive (as I did in my previous house with no problems). I have a combi boiler (Ideal Logic 30) and a single-channel hive receiver. The old thermostat (...
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38 views

Trying to wire a nest thermostat E in UK with 2 live wire and 2 neutrals

I live in the UK and am trying to replace a Honeywell WiFi thermostat with a Google Nest thermostat E. I have 2 3-core wires coming into my thermostat, 2 live and 2 neutral wires, 1 pair I believe are ...
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31 views

How to further troubleshoot a problem with my condensate pump?

During a recent trip to be basement I noticed that the floor was wet under my condensate pump. This pump collects the water from my water heater but it's powered through my boiler. There was a lot of ...
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44 views

How do I test and maintain the expansion tank on my boiler?

I don’t know what maintenance or adjustments are possible on an expansion tank. I understand from the answer to this question that it needs to be "pre charged" to accommodate the range of ...
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0answers
26 views

Oil burner Fuel line adjustment

In my crawlspace, I have an oil tank at the front of the house, with the fuel line running to the rear of the house where the oil burner is located. Fuel line is on the floor, running mostly along a ...
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0answers
152 views

Water heater boiler has nasty red sludge leaking out of it

My water heater wasn’t performing as expected today while attempting to draw a 2nd bath. So I went to look and the rusty water leak seemed somewhat prominent, so I’ve gone ahead and opened up the unit....
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11 views

Heating Issue — hot water baseboards

and thank you. I have a gas hot water boiler, two story house, hot water baseboards on top and first floor, boiler in the basement, separate circulating pump and loop for each floor. The boiler kicks ...
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323 views

help me find C wire on williamson boiler and where should I connect it

I have Williamson boiler GWA 140,000 BTU. I have 2 zones in my house for heating. On one zone I want to install smart thermostat so, I need C wire. The old thermostat for this zone had 2 wires: red ...
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182 views

Problems w/ Nest

I've got a common problem but I can't seem to find the simple answer. My heating system is simple. Forced water oil boiler with three zones. Two zones are controlled by the Nest E Thermostat. I'm ...
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0answers
44 views

Do I have a place for a common wire?

I have a boiler for heat/hot water, with multiple zones. It is a backup for a ductless mini-split installation. I'm trying to work something out where the boiler actually does backup the ductless ...
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0answers
30 views

Boiler Flame Pattern

I have a propane fueled boiler for all my hot water / heating needs in USA. I was looking at the flame pattern today, it was louder than normal and “stuttering” on the left 3 burners . The right ones ...
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0answers
18 views

What is the advantage of a using a "Zone Controller"?

Looking at most pre-fab hydronic panels, the provide a Zone Controller. Initially I though they were used to stage the activation of the pump until after the valve was able to open but, looking at ...
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35 views

stats on *total* cost of high-efficiency boiler?

Not trying to start a subjective debate here, just looking for some objective statistics. I get that high-efficiency boilers are much more efficient, and will save big bucks over their lifetime in ...
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156 views

Connect "C" wire on boiler model number 1135-601

I've read several threads here and on the other websites but still can't figure out how to add C wire to my boiler wiring. I would like to replace my old mercury thermostat with Nest E or any other ...
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179 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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0answers
12 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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390 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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0answers
51 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
54 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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0answers
21 views

Do I need to replace the thermostat wiring leading to my boiler?

I have a boiler in an old building with four different apartments. There are two thermostats that call for heat from the boiler, and valves that direct the hot water to the respective part of the ...
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0answers
4k views

One zone of baseboard heating not working, likely airlocked

Pretty sure I've got this, but would like confirmation. One zone of 4 on my boiler is not putting out heat. Gas company came out, gave boiler, valves etc. the thumbs up and say they believe the line ...
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0answers
228 views

Re-pressurize boiler / change expansion tank

I have a question about how to pressurize system when replacing expansion tank. I have successfully taken the old tank off, and am about to go buy a new expansion tank(hopefully already pressurized ...
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0answers
1k views

PVC Water line keeps getting pin holes

The water line that goes from my boiler, carrying warm water keeps getting pin hole leaks. The line is a standard flexible white plastic insulated pipe, covered in a red mantle. About a year ago, I ...
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90 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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224 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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0answers
37 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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0answers
75 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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0answers
3k 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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0answers
134 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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144 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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0answers
149 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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478 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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19 views

Only unit in condo building with water hammer

This exchange is always helpful. I read a similar post for some ideas, but this situation is slightly different. I have hydronic baseboard heating with a common boiler in the garage under the building....
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0answers
33 views

Wiring Boiler for a C wire Adapter

I want to install a smart thermostat for one of my boiler zones. My thermostat doesn't have a C wire. It looks like installing an adapter would be the best option, but I am not sure my system is ...
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0answers
23 views

Do steam heat systems need flushing?

Do steam heat systems ever need to be flushed? The last owners & I never did, about 25 years. One pipe steam heat system, 30g peerless oil boiler. Sight glass gets fairly brown within days of ...
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22 views

Preparing for steam boiler maintenance

I've just moved into a new house with radiator heat/steam boiler, and there seem to be a few issues (loud banging noises on startup, one radiator leaking). I have a maintenance person coming out next ...
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14 views

Hydronic boiler flue ventilation

My gas hydronic boiler is designed (or just specified) to require a draft hood and a damper on its 6" flue. My question is, on a level lower that going by the dictates of the spec, how much less ...
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15 views

Pressure testing gas hydronic boiler

I just bought a used gas hydronic boiler at an antique shop. I have not yet installed it and the item is still returnable if dysfunctional. I was wondering if it would be a good idea to pressure test ...
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13 views

Choice of steel pipe for extending boiler water sockets

I bought a used hydronic boiler at an antique shop and it came with 1-1/4" (can't tell if galvanized or black due to corrosion) steel fittings for water in and out sockets. In extending them for ...