(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 11 of 11

Thread: Little to no heat upstairs

Hybrid View

  1. #1
    DIY Junior Member jaheinzel's Avatar
    Join Date
    Nov 2009
    Location
    Michigan
    Posts
    6

    Default Little to no heat upstairs

    I have a hot water boiler system in my house. Overall the house is nice and warm. Upstairs Bedroom 1 has a nice big old cast radiator with a line coming pretty much straight up from the boiler to feed it. That room is fine. The rooms that are not warm are highlighted in dark blue. They all have convectors (two are only one year old). They just don't seem to warm up. The system is only one zone, and I'm thinking that is the problem. Last night I cranked the temp up to 73 and it was warmer upstairs, but the convectors still didn't seem that warm. So I went and checked the lines coming upstairs (in attic space). The line coming up was hot, but the return was barely warm.

    Any suggestions/observations based on my drawing of the system? Just trying to see what I'm looking at here and what options we might have.


  2. #2
    Network Engineer rmelo99's Avatar
    Join Date
    Jul 2006
    Location
    Connecticut
    Posts
    349

    Default

    Have you tried bleeding the radiators? Usually if it's hot on the supply but not even warm on the return then their is some type of air lock in the radiator.

  3. #3
    DIY Junior Member jaheinzel's Avatar
    Join Date
    Nov 2009
    Location
    Michigan
    Posts
    6

    Default

    I have bled the radiator in Upstairs Room 1. I'm not sure how you bleed the convectors in the other rooms. There is a drain on both the supply and return sides of that loop upstairs, could I do it from the return side drain?

  4. #4
    Network Engineer rmelo99's Avatar
    Join Date
    Jul 2006
    Location
    Connecticut
    Posts
    349

    Default

    Your diagram is just a logical representation of the system. Not knowing your acutal piping and valve arrangement makes it a bit difficult to point you in the right direction. Is your system a 1 pipe, 2 pipe? Would help if you could give us some more piping lines that represent supply and returns. Pics would also help greatly.

    If you don't have a way to bleed at the actual convectors then yes you will most likely need to purge the air from some drains down in the basement. Depending on your valve arrangement this may be very easy or a bit more of a pain.

  5. #5
    DIY Junior Member jaheinzel's Avatar
    Join Date
    Nov 2009
    Location
    Michigan
    Posts
    6

    Default

    The diagram is accurate as far as how the water flows out of the boiler and where it splits etc. I could label each of the lines with what type/size pipe is in there. The drains I'm talking about are actually in the kneewall attic upstairs so I can see what I can get out of those today and see if it makes a difference in the return temp. The convector in the bathroom upstairs has a little handle "valve" type thing on it. If I turn it it seems to just move freely. I wonder if there is something up at that point that is restricting the water flow past it?

  6. #6
    Network Engineer rmelo99's Avatar
    Join Date
    Jul 2006
    Location
    Connecticut
    Posts
    349

    Default

    Quote Originally Posted by jaheinzel View Post
    The diagram is accurate as far as how the water flows out of the boiler and where it splits etc. I could label each of the lines with what type/size pipe is in there. The drains I'm talking about are actually in the kneewall attic upstairs so I can see what I can get out of those today and see if it makes a difference in the return temp. The convector in the bathroom upstairs has a little handle "valve" type thing on it. If I turn it it seems to just move freely. I wonder if there is something up at that point that is restricting the water flow past it?

    The diagram doesn't show how the water gets back to the boiler? Also are you sure that the bathroom and bed 2 and 3 loop from on to the next? That would mean that after bed#3 there would have to be a line coming back to the boiler. You can determine where the airlock is by seeing where the heat stops.

    By your diagram it gets to the bathroom, if you have no heat at that unit then there is air from that point forward. If you have no bleeders on any of those 3 units then you need to drain from a drain after bedroom 3. The problem is that if you open that drain the water needs to go from

    boiler--->bathroom---->bedroom2---->bedroom3------>drain--->return to boiler.

    if you open the drain and don't have a way to isolate the boiler then the water that comes out of the drain will be coming up from the boiler and not thru the bed 3 convector. Follow?

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •