1. Visiting from the US? Why not try DIYnot.US instead? Click here to continue to DIYnot.US.
    Dismiss Notice

Hydronic system, losing hot water, radiator valves closed

Discussion in 'Plumbing and Central Heating' started by yohobill, 6 Nov 2020.

  1. yohobill

    yohobill

    Joined:
    6 Nov 2020
    Messages:
    1
    Thanks Received:
    0
    Country:
    Australia
    Ok, bear with me. I have a thick question but my plumbing knowledge is as deep as a teaspoon.

    We have a Baxi Luna hydronic system suppling our hot water & heat. For the past two weeks, it's been 'tripping', eg pilot light extinguishes and needs to be reset (if that's the right word). I called a plumber out after a few cold showers and he diagnosed pressure as the problem, adjusted it marginally and left. Hoped this would fix it, but I had doubts it was the cause as the pressure setting hasn't been adjusted in the past three years.

    Today, I realized nearly all of the radiator valves in the household had been turned off. My genius housemate had apparently turned them off two weeks ago (it's summer currently so I didn't notice) because he couldn't figure out how to adjust the heat setting. That's cool and all, but good lord I wish instead of putting effort into complaining about the travesty of brushing his teeth with cold water, he could have just put put two and two together and realized that the gas powered hot water issue started the same day he messed with the gas powered radiators.

    Anyways, look, I myself am no genius. I have next to no idea how hydronic systems work. I do want to understand however WHY it would trip if the radiator valves are closed. I feel it's something like closing the valves means there's less water to heat which causes it to overheat and trip a sensor to shut down? Also, does the original plumbers logic still stand - perhaps closing the valves affects the pressure, if so, why is pressure important?

    Apologies, I'm aware these are somewhat thick questions but I'm coming from a point of no knowledge!
     
  2. sircerebus666

    sircerebus666

    Joined:
    31 Oct 2019
    Messages:
    1,423
    Thanks Received:
    224
    Country:
    United Kingdom
    Are you in the UK?
     
  3. Sponsored Links
  4. muggles

    muggles

    Joined:
    28 Oct 2005
    Messages:
    13,342
    Thanks Received:
    3,077
    Location:
    Daventry
    Country:
    United Kingdom
    Given that they've said "it's summer currently" I rather doubt they are. Doesn't mean we can't help though
     
  5. sircerebus666

    sircerebus666

    Joined:
    31 Oct 2019
    Messages:
    1,423
    Thanks Received:
    224
    Country:
    United Kingdom
    That's why I asked
     
  6. Sponsored Links
  7. muggles

    muggles

    Joined:
    28 Oct 2005
    Messages:
    13,342
    Thanks Received:
    3,077
    Location:
    Daventry
    Country:
    United Kingdom
    @yohobill turning your radiators off won't affect your hot water production, that's just coincidence. If your pressure is continually dropping, you either have a leak somewhere or an expansion vessel issue. There will be a small pipe leading to outside, which is the pressure relief pipe to prevent your boiler's pressure going too high. Can you find it?
     
  8. DIYnot Local

    DIYnot Local

    Joined:
    3 Sep 2019
    Country:
    United Kingdom

    If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

    Select the supplier or trade you require, enter your location to begin your search.


    Are you a trade or supplier? You can create your listing free at DIYnot Local

     
Loading...

Share This Page