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  1. Boiler problem losing pressure

    HVAC
    My heating system is losing pressure and now requires topping up daily via the filling loop in order for the boiler to work. I have a Vaillant Eco boiler with a large tank in the loft. The filling tap is located next to the tank in the loft. There is a pressure gauge next to both the tank and...
  2. Boiler burner cuts out intermittently

    Plumbing
    I have a 30 year old Peerless boiler originally oil fired for my hot water radiator system, converted to gas 9 years ago to a Wayne P265F gas gun. Has been working fine for 9 years with no problems. Now I have an intermittent problem where the flame cuts out occasionally and it will not...
  3. Can't purge all air out of boiler zone

    HVAC
    One zone has been acting up a lot with gurgling noises. I have tried to purge the lines twice now and the noise never goes away, even though no air bubbles eventually come out of the hose. Just to make sure I am doing the purge correctly, these are my steps: 1. Turn boiler off 2. Shutoff all...
  4. Boiler Pressure is high

    HVAC
    Our boiler psi has been maxing out at over 30psi. The other day there was water on top of the boiler, but I am unsure where it came from. Others suggested it was the relief valve, but that is on the right side of the boiler and the down pipe drains into a drain. The expansion tank doesn't sound...
  5. Auto Water Feed Stopped .. Steam boiler not restarting

    HVAC
    It looks like my auto water feeder on my Burnham Steam Boiler died. Steam boiler ran out of water. I manually refilled it, but nothing is happening. I can hear a loud click when I turn it on, but nothing after that. I believe that the loud click is to get the vent checker (??) going? If it...
  6. Hot water boiler suddenly struggling

    HVAC
    Hello - I've lived in an old turn-of-the-century home in Iowa for a few years. We have a three zone hot water boiler system that usually works pretty well (though we've had to replace two pumps, the gas valve, and two pump power supplies). Over the summer I inadvertently disconnected...
  7. Multi zone boiler question

    HVAC
    Hello everyone, I'm new to this website, but I do almost everything "DIY" so I was hoping to get anyone's opinion on the follow scenario... I've switched my 1100sq' ranch over from a FHA furnace to all hydronic using a Buderus G115 (also oil fired). I have 4 main zones: 1-main living area...
  8. Oil Boiler Conversion to Cold Start?

    HVAC
    Hey all, I currently have an oil fired boiler that sends heat to hot water radiators throughout the house and also heats the hot water for all faucets in the house. What I would like to do to prevent the use of oil in the summer months is install a water heater. Is this possible to do with...
  9. Hot Water Heater Vapor Sensor Lockout "Bypass"

    Plumbing
    Hello All, I felt the need to share this. All of a sudden my Rheem hot water heater stopped working. Diagnosing it by the light pattern it was a vapor sensor lockout. I researched and found out how to reset it and still no good. I called up Rheem and they sent out a replacement sensor, but...
  10. Boiler question

    HVAC
    Hello. I have a question that I can't find an answer for anywhere, and would greatly appreciate any help. When turning off the boiler for summer time, my mother-in-law continues to insist to my wife that all we have to do is turn off the red "emergency gas burner" switch at the top of the...
  11. Gas-Fired Hot Water Boiler Wiring

    HVAC
    Hello, I've got what seems like some crazy wiring for my tstats/aquastat, zone valves, and boiler. I'm stumped trying to figure out how, when I my tstats call for heat, that anything is communicated to my boiler. Everything is working fine, but it's driving me crazy that I can't figure it out...
  12. Sanity Check: Going from Hot Air to Zoned with Gas Stove and Hydronic

    HVAC
    My wife and I are in the middle of renovating a 1500 sq ft ranch house in Upstate New York (Adirondack Mountains). The house currently has a forced hot air furnace with no return ducting (mobile-home style furnace). I really dislike the current heating scheme and the thought of doing all the...
  13. No firomatic valve at pump on oil boiler

    HVAC
    I recently inherited a house with oil heat/water. There is a firomatic at the tank a 70ft line coming from the tank to the boiler. That line goes directly into the pump on the burner motor. There is no valve/shutoff at the burner. Is this a code violation/safety concern? If so how to I go...
  14. Wifi swtch to replace the emergency boiler switch

    Electrical
    I am looking for a solution that will allow my ecobee thermostat send a signal to a wifi switch to turn off the boiler. I like that it will stop calling for heat while I am "away" but I would like to have the boiler stop heating the water as well. 1. first question: is it a bad idea to mess...
  15. Gravity coal boiler set up?

    HVAC
    The coal boiler I have is a Ideal Arcola hot water boiler, I think it is the number 4 on this link I will provide... https://archive.org/details/IdealArcolaHotWaterHeatingBoilerForCellarlessSmallHouses I would like to point out before you comment, I do not need your comments on codes, you can...
  16. Circulator on gas hot water furnace not working

    HVAC
    I think I have a bad circulator. I have 120 volts going to it. The light for zone 2 is on so i knew the thermostat was sending the message. I check voltage at 120 past the relay going to the circulator and took the cover off the circulator and got 120 there too, but it's not sending the water...
  17. Boiler (dual t/stat) selection for multi call system

    HVAC
    I am about to replace my Keston C55 boiler. It provides for: DHW, 2x wet rad systems, wet u/floor system. The Keston has been great as it can supply output at 2 temps (2 separate thermostats) depending on what is calling for energy. E.g. u/floor is running a lot of the time on its own at 40c...
  18. Boiler Zone Confusion

    HVAC
    I'm a new homeowner with my first hot water baseboard heating system. My system has 5 separate zones (see pic). One of those zones is an unfinished portion of my basement, and I know there is currently an issue with either the thermostat or the control valve on that loop. As a temporary fix, and...
  19. New boiler hammering (foaming/priming?)

    HVAC
    I just had a steam boiler (Weil Mclain) installed and the installers addressed some of the initial hammering by bleeding some of water in the unit from the top-most drain valve. I've now read about this process as "defoaming". Well they are done and gone now and during the first night (a few...
  20. NTI-150 boiler won't shut off blower motor

    HVAC
    The gas-powered boiler in our house works well except that after it finishes a heating call, the fan won't shut off. This is annoying because the next time the boiler comes on it will trigger an ASC (Air Switch Closed) error because well.... the fan is still on sending air through the air...
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