Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

Loud gurgling when start ing up.

Timco
Timco Member Posts: 3,040
in THE MAIN WALL
#3 is the fastest setting...you may just be hearing the flow of the water. Try #2 or #1 (lowest). I was advised that if all rads heat, the lower setting is fine, but you need to be sure the return temp does not fall too far below the supply, or boiler temp.

T
Just a guy running some pipes.

Comments

  • Anthony_10
    Anthony_10 Member Posts: 23
    Loud gurgling when heater starts

    I get a loud gurgling noise when my heater starts up. The pressure is fine, but I noticed that I've been needing to bleed my upstairs bathroom radiator ( the smallest in the house ) several times since turning the heat on. Any suggestions of what may be causing this ?? The heater works fine and the gurgling quiets down after about 15 seconds.
  • Timco
    Timco Member Posts: 3,040


    Have you replaced water lately? could be gases from the water. Gurgling is air. Keep bleeding or install an air separator.

    T
    Just a guy running some pipes.
  • Arthur
    Arthur Member Posts: 216
    gurgling

    Would suspect a gland on the suction (inlet) side of the pump is allowing air to be sucked into the system, or have you replaced the pump or changed the speed of the pump to run faster lately??
  • Anthony_10
    Anthony_10 Member Posts: 23


    I installed a new pump last year, and that seems to be running OK. How would I go about adjusting the speed of the pump ?? Thanks for your suggetions.
  • Timco
    Timco Member Posts: 3,040


    If it is a variable speed pump, there will be a selector switch on the junction box with 1, 2, and 3 being the settings.
    Just a guy running some pipes.
  • Anthony_10
    Anthony_10 Member Posts: 23
    Switch setting

    I checked the switch setting and it is at 3. Should it stay at 3 or should I change it to a lower setting. Again, thanks for your help.
  • Arthur
    Arthur Member Posts: 216
    cvincent@ihug.co.nz

    The difference in the temperature between the flow (water leaving the boiler) and the return (water coming back from the rads) should be approx 20deg F with all rads valves wide open, if any returns on the rads are hotter than that the regulationg valve on the return of the rad should be closed down a bit. The object is to get a even drop over all the rads. I suggest you slow the pumpo down to speed 1 and see how it goes.
  • Anthony_10
    Anthony_10 Member Posts: 23
    pump speed

    Thanks for your suggestions. I am assuming I change the speed of the pump while the pump is off ??
This discussion has been closed.

Categories