I need to bleed the main pipes next to my central heating boiler every couple of days, I don't know if i'm doing that right.

The pipes and water are hot, but once bled the pipes and radiators get even hotter and the boiler seems to kick more.

Any ideas so i don't need to keep bleeding the system?

Thanks

Are you bleeding the system when it is switched off :confused: I used to think it needed to be on for flow, this is not the case it would seem, so bleed when the system is off :thumb:

I bleed when its on, will bleed it when its off tonight and see what happens

Thanks
S!

Bleeding when it's on is supposed to suck air INTO the system..........

Alcazar

Definately bleed with the pump off.
Check if you have any hidden bleed valves, as well as just the radiators. The boiler itself may have them, as well as any pipe runs that are "high", also the pump itself.

You should bleed downstairs first, then upstairs. Think of the levels of various items and aim to fill from the bottom up.

HTH

Cheers guys.

You should bleed downstairs first, then upstairs. Think of the levels of various items and aim to fill from the bottom up.

HTH

I was told recently by british gas not to bother bleeding the downstairs ones as the air rises and will only be present in the upstairs radiators.
I used to do it with the boiler still on, but with doing it now with it switched off, i have done it once and not needed to do it again (that was from spring this year though so not really used the rads that much)

I was told recently by british gas not to bother bleeding the downstairs ones

Sorry, I don't agree. The air does rise, to the top of the rad!!!!! It will not necessarily get re-absorbed into the system and find its way magically to the upstairs rads only.

If the air is already in a rad, it will tend to stay there until bled out.

HTH
Steve

is the water temp overheating from the boiler. is it banging or sounding like a kettle. if it is that would produce air in system(boiler engineer required)
there is positive and negative pressure on a heating system (if it has an open vent and header tank) positive from pump to vent/cold feed. negative from vent/cold feed to pump. the vent/cold feed is the neutral point of a heating system.
bleed all rads that need bleeding upstaires and down

Sewer rat, my heating system is knocking, the boiler makes a slight noise then by the time it reaches the radiator in my room sounds like a ball bouncing. Pipes not loose checked, what is this, doing my head in!!!!!!!!!!!!!!!

does your system need topping up? there could be two 'taps' to get your pressure bar up under the main boiler.. think you set it to 1.5

How hot is the thermostat on the bolier heating system set to? Could be boiling the water...