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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49 views

Can I build a small basement under wood cabin and add an electrical boiler 30L for shower and sink?

Can I build a small basement under wood cabin and add an electrical boiler 30L (e.g. Ariston Andris) for shower and sink that would be at ground floor?
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78 views

Can't get boiler to stop heating! It's 80 degrees in the house

I have two boiler systems. One for the heating of the house, and one for sink/shower hot water. The boiler for the house will not turn off! It does kick on and off for a duration of time like it ...
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29 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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Is there a way to relieve the pressure on a model 30 expansion tank without draining the system?

I want to change my Xtrol model 30 expansion tank on my boiler. It is not waterlogged but 15 years old and I'm getting ready to sell the house. Plus the pressure has been going a little higher than ...
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2answers
165 views

Why do some multi-zone heating systems have multiple circulators?

In a lot of photos I've seen here and elsewhere of hot water home heating systems with multiple zones, each zone has its own circulator. In my two-zone system there is one circulator, with a zone ...
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41 views

Can I have independent heating zones with a standard boiler?

We have a new standard gas boiler in our home along with two thermostats, one for the basement and one for the rest of the house (living room, bedrooms, etc). The problem we're having is that the ...
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25 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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1answer
38 views

How can I increase boiler system pressure so bleeding 3rd floor radiators is easier?

It is very difficult to bleed air out of my 3rd floor radiators. I need at least 23 pounds according to the gage on the boiler, and ideally closer to 30 (but not too close!), to speed things up. The ...
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C-wire nest to burnham boiler

Connecting nest learning 3rd gen to burnham series 2 model 203 boiler. I am only using the system for heat. I have three wires at the thermostat R,W and an unused green that I would like to turn ...
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1answer
36 views

How do a boiler’s autofill valve and expansion tank work together as a system?

How do the expansion tank and automatic fill / reducing valve work together in a hot water heating system? It seems to me that if the expansion tank is charged too high the autofill valve will never ...
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65 views

Does this boiler flame look ok?

This is my natural gas hot water heating boiler flame. It lights up initially with a fair bit of orange flame, and after 10 seconds or so settles into what's pictured. I believe it mostly looks as ...
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Boiler Gauge Readings

Trying to understand this gauge and ensure everything is working as intended. I know the top part is the temperature of the water I am assuming at the boiler. Again PSI of the water pressure, but what ...
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100 views

Where can I install a C-Wire for Weil-McLain gas boiler? (EGH 115, 4 Series, Natural gas)

I want to install a C-wire so that I can use a WiFi Thermostat. Behind my current thermostat there are only 2 wires (red and white) There are 2 wires tucked and unused, (green and blue) I had tried ...
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1answer
31 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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1answer
36 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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77 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
54 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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22 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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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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62 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
103 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
89 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
56 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
78 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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49 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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26 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
61 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
46 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
762 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
88 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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1answer
52 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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138 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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234 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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24 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
179 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
51 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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60 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
54 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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69 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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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
77 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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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
34 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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52 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
55 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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136 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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