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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22 views

Gas Boiler Furnace not igniting

So I got a boiler that had not been used in a bit, maybe a couple of years but was working. The last time they needed to have some come light the boiler. My assumption there was the ignitor was going ...
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35 views

Should I get a condensing boiler or atmospheric boiler for cast iron radiator system

I am looking to replace the boiler as part of a basement reno. The house was built in 1903 and has cast iron hot water radiators but we've done a fair amount of work to it, added insulation and have ...
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56 views

How can I switch a circulation pump between continuous power and thermostat control?

I have a dedicated 20 amp circuit powering my boiler's control unit. The control unit is basically a relay operated by the thermostat that 1) fires the boiler and 2) turns a circulating pump on and ...
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1answer
52 views

No water flow through zone of water boiler, all other zones working. How to get water flowing?

tl;dr - How can I get water flowing through one of my zones of a baseboard boiler heat system? I have baseboard boiler heat with 10 zones (5 per boiler). One of the zones (unfortunately, it's our ...
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21 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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12 views

Adding Aquastat for hydronics to existing steam boiler

I have a steam boiler in a residential home of a friend of mine. He asked me if I would take a look at his system. Someone added a circulator to his steam boiler so that he could get heat in his ...
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48 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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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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2answers
90 views

How do I bleed a very old radiator and identify whether my system is steam or hot water?

All radiators are heating except one, so I'm trying to bleed it. There doesn't seem to be an obvious bleed valve (unless it's that nondescript, frozen, simple bolt on the top front corner of the left ...
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1answer
37 views

Filling a Viessmann Vitodens 100W that has dropped to minimum pressure

I have a Viessmann Vitodens 100-W that heats my house, and I presume delivers hot water too. I must confess I have been negligent, and never had it serviced. The unit is 8 years old. I will get it ...
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1answer
55 views

Extra powerful boiler short-cycling and overfilling

I have a gas powered steam radiator heating system with 8 radiators in the entire house. I replaced my old heating boiler with Crown Bsi138enpzzpsu 138K BTU which is way too powerful for my house. My ...
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1answer
73 views

How do I move a hot-water convector?

I have a "breakfast nook" section of my kitchen with a large hot water convector installed along the baseboards of two walls. Because of other elements in the heating system located close ...
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1answer
40 views

How to find source of leak in heating pipes under concrete / glued floors?

Update 2021.01.11 In case this helps anyone - I was able to trace the leak and make the repair in the end. Steps were this: Locate leak as closely as possible by isolating areas of the heating system ...
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1answer
24 views

Should I clean my boiler room duct (ventilation)?

Our boiler room in our house is in our half above/half below ground basement. We have a new 100,000 BTU boiler that was installed last year. We also have a gas hot water heater next to it. In the ...
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1answer
60 views

Why does my first floor thermostat also make my third floor baseboards turn on?

(Possibly related to this question but I do not have the expertise to diagnose at the level of the author of that question) I moved into a new house recently that was billed as having three heating ...
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1answer
44 views

Thermostat C wiring issue

I am having a two-wire system oil boiler with two-zone valves. I installed two Nest E and worked fine but it started to swing the valves due to the charging cycle. So I decided to run a new C wire ...
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12 views

Why is my boiler intermittently shutting off?

I have a Burnham boiler model pvg8ani-gs. It shuts off for no obvious reason. It might run for 1 minute or 30 seconds and then might stay running. I have replaced the board and it still has the same ...
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1answer
447 views

Bleed radiators with no valve - is this valve near the boiler what I want?

I recently bought a house, and with the winter starting to set in (UK), have started putting the heating on in the mornings/ evenings. As many people are at the moment, I am currently working from ...
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3answers
69 views

Can I use 1 Nest Thermostat with 2 boilers?

I have 2 boilers in my house. 1 is for the main house and the other one is for the annex which is built a few feet away from the main house. My 1st boiler is connected to Nest thermostat. Can I ...
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32 views

Why does my Vaillant boiler shut itself off every day?

I'm subtenant and I have Vaillant boiler (don't know which model). Every time I use shower after few minutes boiler shuts itself down and the burner lockout indicator is flashing. I'm then without hot ...
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90 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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1answer
162 views

c wire on a multi taco zone valve boiler

looking for assurance on what I think is the right setup to add a c wire to a current 2 wire zone setup. See pic of transformer junction box. Currently I have 3 zones using one transformer and 3 taco ...
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23 views

Zone valves and air purge

I have a 3 zone boiler system with baseboard heating. Zone 1 & 2 have nest thermostats, zone3 has a non-programable thermostat. Zone 2 & 3 are not getting hot. Pipes are hot about 3-4 feet out ...
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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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1answer
153 views

Where do I connect a C-wire to my electric boiler ( Slant/Fin Monitron Boiler )

I'm looking to add a C-wire for my thermostat. My current thermostat has two wires, W and R. But there is another tucked in blue wire. That blue wire isn't connected to the boiler. I'm looking for ...
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1answer
47 views

Where should I place the C wire?

I have an old Lennox boiler which doesn't appear to have a PCB board. Originally the old honeywell thermostat had a 2 pair wire attached which included Red and White Wires. I snaked an 18/5 thermostat ...
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2answers
55 views

What is this strange valve/trap from my boiler to condensate pump?

I have a condensate pump attached to a valiant combi boiler with the usual pvc pipe turning into it (removed in picture, but works fine going into the point behind the copper pipe here), with the also ...
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1answer
45 views

What should the input pressure be for a hydronic system?

I have a boiler that's operating range is 12 to 30psi.The documentation says that it loses "efficiency" at the low end of of the operational pressure range. When looking at pressure reducing ...
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60 views

How do you connect a Nest thermostat to a Noritz CB199 DV combi boiler?

I have only one zone and I'm using the internal boiler pump. I do not have any zone valves. I have a 24v transformer and a White Rodgers 90-370 relay.
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36 views

Gas boiler cuts out after being switched on

When I switch on our gas boiler (mynute he), it turns off after approximately 2 seconds. Link to newer model here https://www.vokera.ie/homeowners/boilers/mynute-vhe-2/ I checked a radiator to see if ...
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28 views

Boiler System heats one room more than all others

I have a two zone older natural gas boiler system. All rooms in the house get heat. One room on the second floor gets hotter than all others. Almost like all the heat is going to that room I don’t ...
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1answer
76 views

How does a water mains booster pump work? Isn't the flow rate solely determined by what reaches the property in the first place?

When getting quotes for a boiler replacement, we've been recommended to install a mains booster pump (e.g., Salamander HomeBoost). We live in a 3rd story UK flat and currently get a dismal 5 l/min ...
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51 views

My central heating comes on when it feels like it

I have checked the wireless thermostat is sending a demand signal to the receiver but boiler isn't firing up (BTW my hot water on demand is working fine). Later on the heating comes on until I turn it ...
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1answer
32 views

Boiler not responding to external wired switch

My boiler has suddenly stopped receiving signals from the external switch. (models listed below). I'm trying to isolate the faulty component. There is no fault code on the boiler. It seems to be ...
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47 views

How to convert Rancilio Classe 7 USB Espresso Machine from 3 phase to single phase system

I have a Rancilio Classe 7 USB Espresso Machine that is setup for 3-phase power and I'd like to convert it to single-phase power. Is this possible and if so, what do I need to do it? Rancilio Web Site
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1answer
49 views

Mounting a Boiler when the studs are not 16 on center

When looking for the studs to mount a boiler I found the studs are 18" on center. I even double checked my stud finder by using a magnet to find the nails in the drywall and they corroborate ...
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1answer
117 views

Rewiring a boiler’s c wire for a smart thermostat

I want to swap out my low-voltage Honeywell for a Nest E thermostat. When I took the Honeywell off the wall I confirmed that I’ve got a C wire running up to the thermostat but when I wired up the Nest ...
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42 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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18 views

new nest thermostat no c wire

I have a new steam boiler model uh1606hsid boiler, I recently bought a nest thermostat and battery keeps dying, is there a way to connect a c-wire to my boiler?
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Pilot light issue

Thermocouple has been changed but pilot still wont stay lit. Is it gas controller?nSo what now? I may also have a cracked heat exchanger but that would seem unrelated. A small amount ofwater ...
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3answers
89 views

Thermostat location in 3 story building

Where would you place the thermostat in a single zone, 3 story building. Tt's a multi-family residential, 3 units, one unit per floor. The boiler is a high-efficiency condensing boiler in the basement,...
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27 views

How to calculate temperature rise rate for hydronic water tank

The engineering to figure this out is beyond me! I have a freshwater hot water tank that holds 30 liters of water. It is heated by hot water (coolant) running through an internal pipe (the heat ...
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24 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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1answer
26 views

Would missing check valve make it seem like heat is always on?

We had an extra zone added to our hot water heating system. The installer used a Taco 007-F5 circulator pump but did not install a check valve like the other zones have. I have verified the pump does ...
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1answer
48 views

What is a 94+ AFUE gas boiler?

I saw that my Natural Gas provider stated I could receive a benefit if I had one or installed one, so I was wondering what it was.
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Closet installation of gas boiler

We have a gas-fired steam boiler (Williamson Thermoflo GSA-150) that heats our house. We're finishing the basement and would like to close off the boiler and water heater (also gas) in a small room. ...
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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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2answers
99 views

3/4" compression coupling leaking for alpine burnham U.S. boiler

My 3/4" compression coupler, which is attached between the alpine burnham boiler's condensate trap stub and the pvc pipe that takes condensate to the neutralizer is leaking. I replaced this ...
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80 views

Replacing a gas boiler fan - UK gas safe regulations

Is it legal (UK law) to replace the fan on a domestic gas boiler yourself? The replacement (according to the manual) involves three screws and two blade connectors. The price of a new fan from the ...
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27 views

Braided stainless water line to boiler expansion tank?

My boiler expansion tank (Amtrol EX-30) hangs on a 1/2” type L copper pipe suspended from a 1/2" copper tee. The bottom of the tank (the air valve) is within an inch of the floor, which makes it ...

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