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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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Boiler causing flooding

We have heat in lower level and garage from boiler. When I shutoff at elec panel in spring, we get flooded. Is this water from pipes coming back in?
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3 zone baseboard heat boiler water heater triggers zone 1 when heating

In the summer with all 3 zone thermostats turned to off, should zone 1 trigger the baseboard heat registers whenever the boiler turns on for the water heater (I’ve even removed zone 1 thermostat)?
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Roth Oil Tank Installed Outside

I am looking to replace my almost 30-year-old oil tank. I have 5 foot ceiling in the basement, my house is located on a pond. I would like to replace with a Roth, but it would need to go outside. I ...
user190575's user avatar
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Baseboard heater connection to Pex Pipe Corrosion [closed]

What I'm showing is the unfinished wall behind the drywall. The pipe connects to a small bathroom baseboard heater (hot water boiler system). The pipes for the heating element look just fine on the ...
Nick B's user avatar
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Where do I get a "C" common wire on Utica Boiler UH15B-060K

Here are some pictures. The thermostat currently has 2 wired, red and white. There's 3rd wire available that's not connected to anything, and not connected to the boiler anywhere either. And the ...
Paul's user avatar
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Whistling gas boiler pipes

I have a new boiler in the basement of a 3 floor house (incl basement) and a Grundfos water pump (ups15-58frc), which has 3 speed settings. We moved in 5 months ago and all worked fine but in the last ...
nic's user avatar
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Vokera Boiler Emptying Pressure Automatically Emptying When Turned Off

So I've bought a new home, and it's a got a Vokera Easy Heat Plus boiler. It works great, and heats up the home cheaply and efficiently. When the boiler is on, the central heating holds water pressure ...
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2 answers
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Boiler Heat -3 Zones, 1 won't shut down when reaches temperature

I have a tri-level home, 3 zones with 3 individual thermostats. This is a pretty old school system. The home was built in 1969. The mid level seems to run constant, even when the thermostat is turned ...
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Why is my heater always flowing some water under the floor?

Looking for some answers about why is there a constant audible hissing and flow in the pipes coming to my heater at home. This is electric model. The pipe that hisses goes along the boiler and down ...
Alexus's user avatar
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How can I connect C-wire at 2-wire Boiler side with existing 24v transformer?

Two zones/thermostats each with 3 wire cable running from boiler room. It appears only 2 of the wires are hooked up (Red and White). There is a 3rd unused and not-hooked-up wire that is dark blue, for ...
jflbball's user avatar
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Two Zone Boiler System. One calls for heat, both zone return lines get hot

I have a newly replaced two zone boiler system and am having issues. One zone is the basement only, the other zone is first and second floor. I have basement zone at 70 and it functions as expected. ...
Mike O'Keefe's user avatar
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How do I connect thermostat C-wire to Peerless boiler setup?

I’m having issues getting power to the thermostats over the C-wire. I have both an HVAC system and an oil burner (Peerless WBV -03 Boiler with a Hydrostat 3250-Plus control module). The oil burner ...
Jim's user avatar
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Why won't my oil burning water heater come back on?

I have a Buderus hot water boiler with domestic hot water. It only comes on if I push the reset on the burner, comes up to temp and shuts off as it should. It happened a few times a couple of weeks ...
Dan's user avatar
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Gas Water Boiler overheats only when zone3 activated

Hello I am having a problem with my gas hot water boiler heating up my Zone3 or 2nd floor. When running the boiler with Zones1 and Zones2 (basement and 1st flr) at high water heat 180F - 220F, ...
Gene Mats's user avatar
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Where do I connect thermostat C-wire to the Peerless boiler relay panel?

I’m looking to replace my existing thermostats (two zones) with smart thermostats that require a C-wire. The current thermostats do not have the C-wire connected, but the wire is already present in ...
Jim's user avatar
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How would you bleed these hydronic lines?

Had to do an emergency pex repair on a section of the lines for our in-floor heat, and afterward, could not figure out the best way to bleed the lines. It was clear the way the temp shot high and the ...
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Can this drain valve be repacked?

Can this valve be packed? I've got two of them and they both leak from the stem if they are even cracked open. On most valves the stem packing nut screws down over threads on the valve, compressing ...
Sherwood Botsford's user avatar
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2 answers
74 views

Do you see flaws in my multi heat sources & multi recirculating pump setup?

Short version: I'm currently designing my water heating setup for a house I'm in the middle of building. Can you lend me your eyes to see if there's any fatal flaws you can see in the diagram I made? ...
Captain Banana's user avatar
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How can I repressurise my boiler?

My Potterton boiler is flashing an E118 error code and pressure is dropping below 0.5 I checked few videos online but those have different valves and knobs than mine. Mine have two black knobs and one ...
Gaurav Chingale's user avatar
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Is the bleeder valve on top of the air separator above the expansion tank supposed to stay open?

I have a Navien hot water heater, it looses pressure slowly and external low water light comes on. I noticed the bleeder valve on top of the air separator is closed. If I open it, air comes out high ...
Rich's user avatar
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2 votes
1 answer
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Do I need to replace the autofill valve on my oil water heater?

I have a ~20 years old Weil-McLain Gold oil boiler connected to the forced hot water baseboard heating system in a 2-story house (two zones with separate pumps, one for every floor). The same heater ...
Shivering's user avatar
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2 answers
53 views

Purpose of this hot water boiler pipe?

The flow of hot water in all my taps was reduced to a trickle. My thought was that there was sediment build up and the electric boiler needed to be flushed out. The plumber quickly removed a ...
sa78's user avatar
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Relight pilot on ideal standard boiler

I recently had to turn off the gas supply and the pilot light on the old boiler went out. The instructions mention turning the gas control knob to pilot position but it doesn't seem to turn. Pretty ...
Vanessa's user avatar
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Boiler *might* have caused water intrusion... who do I call?

apologies if this is a super basic question, but this is my first time owning a home and not sure who to call. So my boiler seems to be leaking -- I think this may have been happening for a while, but ...
luk's user avatar
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Nest thermostat and no C wire at my boiler

so I bought a nest thermostat and it keeps running through the AAA batteries, recommending that I use a C wire, though there's just 2 coming out of the wall (red and white). I got C wire/power adapter ...
Brian Battenfeld's user avatar
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112 views

Thermostat Wiring for Zoned Hydronic Heating

I have a 7 zone circulator pump heated using Navien combi-boiler. 3 thermostats are connected to the boiler, and the remaining 4 are connected to a Taco SR-504 relay. All the connections have 2 wires, ...
Steve's user avatar
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Boiler heats up water, but radiators are not working

The boiler should be working correctly, the hot water works and engineer came two weeks ago to check everything and it’s fine. However the radiators do not heat up. It was working correctly, then I ...
Wiertara's user avatar
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Water gets cold when central heating is on?

I have a Vaillant System Boiler with an external cylinder to store hot water. After heating the water, If I switch on the central heating the water supplier to the taps/showers gets cold after a short ...
james's user avatar
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2 answers
185 views

How to remove limestone from supply lines?

I noticed that some pipes have a low flow of water, in particular hot water pipes. I removed the limestone from faucets using vinegar, and it worked, but I noticed that the supply pipes themselves are ...
Marco Sulla's user avatar
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Should I upgrade my boiler control transformer?

I have a 24V 40VA transformer for my boiler. It powers two zone valves labelled 0.9A each, and two thermostats labelled 1VA each. All of them together would draw about 45VA. I'm now adding an ...
jay613's user avatar
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Pipe coming off of boiler

wondering what the copper-colored pipe coming off of my boiler is? It's never done anything before but recently started leaking some water (not much, but that's why I've got a tray there now). And is ...
David's user avatar
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3 votes
1 answer
76 views

How should this UL-listed boiler cutoff switch maintain Class 1 separation?

The Guard Dog RB-122E Low Water Cutoff is UL listed, it requires 120V AC and is capable of switching 24VAC on the control side of a boiler. It is a self-contained metal enclosure with knockouts for ...
jay613's user avatar
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Removing and replacing PRV from water boiler

The pressure relief valve on my boiler is rated for 30psi but is weeping water on the discharge line at around 25-27 psi so it seems it needs to be replaced. Unfortunately the valve does not seem to ...
codeZonkey's user avatar
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0 answers
66 views

Advice on use of Boiler Reset Device in 2023

Question: I'm looking for wisdom, tips and tricks regarding installation of a "boiler reset", a device that reduces water temperature in a central heating system on moderately cold days. ...
jay613's user avatar
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2 votes
1 answer
270 views

Where to connect a common wire to a Burnham alpine Furnace

Like many on this site I am trying to install a smart thermostat. I have 3 wires, 24V Red, white, and blue at the thermostat, but only 2 down at the boiler. My boiler is a Burnham Alpine model number ...
Paul's user avatar
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1 answer
379 views

What is the proper way to drain my baseboard heaters?

I am in the process of adding a new baseboard heater and I am trying to figure out the proper way to drain my system. I believe I will first need to shut off the valve on the right in the picture ...
brassmookie's user avatar
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401 views

How can I tell if there’s enough water in a hot water boiler system that doesn’t have a pressure gauge

It has an automatic water filling system with a Watts pressure valve SB1156F but the third floor radiator was empty. I’ve held the purge lever on the pressure valve open to fill the third floor cast ...
Michael 's user avatar
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0 answers
68 views

Central Heating Inhibitor for underfloor heating?

I am getting quotes for annual gas boiler service. The guy was talking about adding central heating inhibitor. I have underfloor heating (gas), which he knows. Would you still use central heating ...
Cheetah's user avatar
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3 votes
4 answers
2k views

How can I move a new heavy boiler to the basement and the old one up and out?

I need help moving a new boiler into my basement and to have the old boiler removed from my basement. It will be a warranty return less than 1 year of use so the old one must be kept intact. The ...
TommyO's user avatar
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2 stage heat pump and condensing boiler run off one 3rd gen thermostat

I have a 2 stage 20 seer bosch heat pump utilizing aux heat strip for second stage. I also have a navien condensing combi unit for domestic and hot water baseboard heating. Currently both systems are ...
Brian's user avatar
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1 vote
2 answers
416 views

How to increase flow without causing cavitation in hydronic heating system

I have a hydronic heating system in which water heated by a boiler is pumped around the perimeter of the house using circulator pumps. Currently the flow rate is too low, causing the boiler to ...
user169686's user avatar
0 votes
1 answer
72 views

Electronic boiler (water heater) stopped heating: weird cable hookup

My boiler stopped heating water yesterday. It was working fine for 1 year (I rent this home so I guess this boiler could be more than 5 yrs old. For the debugging, I started with measuring the voltage....
Christianidis Vasilis's user avatar
1 vote
1 answer
242 views

How to reduce ghost flow from boiler to indirect water tank

I recently had an indirect-water tank added to my multizone gas-powered hydronic heating system. The supply line from the boiler to the water tank heats up considerably every time one of my heating ...
user169686's user avatar
2 votes
1 answer
689 views

Is my basement chimney suitable for venting a gas-powered boiler?

I just purchased a home, and I am looking to install a new gas powered boiler. The current boiler vents into 100 year old chimney. To my surprise, there is an unobstructed view from the bottom of the ...
user169686's user avatar
1 vote
2 answers
140 views

How to make c-wire to a new boiler using Fast-Stat common maker?

I'm seeking assistance regarding connecting a C-wire (for Ecobee) to a new boiler using the Fast-Stat common maker. The new boiler currently has two thermostat wires available for connection. However, ...
Kamsu's user avatar
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1 answer
129 views

Old house, want to update thermostat

I bought an older house (1897!) and am slowly but surely going around and repairing things and updating them. I want to update my thermostat to an ecobee one. We only have radiators and no AC, but ...
Brian Desmond's user avatar
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1 answer
89 views

Oil boiler, remove baseboard from entire house but keep the water heater

I have a question about removing Hydronic Baseboard but keeping the boiler and water heater in place. Is this relatively straight forward? Shut off power Cut off the supply and return for the ...
Jake's user avatar
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1 vote
2 answers
489 views

Can I use just split units for winter heating if I have both mini splits and hydronic base board heaters?

We're trying to go all-electric/solar and reduce reliance on fossil fuels. We currently have an 11 year old propane tankless combi-boiler that supplies hot water and also circulates water through a ...
Kristoph Matthews's user avatar
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2 answers
246 views

Temporary water supply shut off to a gas oil fired furance

I have a oil fired furnace that supplies all hot water to the house (the house is on well water)including base board heat. If I shut the main supply off where it enters the house in order to install a ...
David White's user avatar
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1 answer
221 views

Brand new boiler only provides a 15 minute hot shower

My folks got a brand new boiler last year that is supposed to “continuously” heat water with no hot water tank. Our old system we replaced would run over an hour at least (I never once ran out of hot ...
Katie's user avatar
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