Calling all Plumbers!

[Seanl]

I bled my radiators yesterday as the tops were only getting warm but bottom was nice and toasty. Problem is, I did it with the heating switched on as thats how I thought it was done. The pump started squealing in my combi, and now the heating and hot water doesnt work at all. I switched everything off, and bled it all again, then turned it back on, but as soon as I manually turn the heating on, or turn a hot water tap on, the pump sqeals for a second, and the heater ignites, but then switches itself back off. Boiler is a worcester 28cdi, and was serviced annually until I moved in 3 years ago 

Any help very much appreciated, as I cant find a definative answer online. Cheers.

[Toby]

Im sure alex will be along shortley, im a plumber but i know nothing about boilers

[Seanl]

Cheers bud!

[luke]

Im sure alex will be along shortley, im a plumber but i know nothing about boilers

pretty useless plumber then 

[justalex81]

where is your boiler located? i assume it's upstairs or in the loft.

when you bleed a pressurised system you must top the pressure up at the boiler via the filling loop. what you've done is fill the radiators with the water that was in the boiler and the pump has run dry.

First thing to do is re pressurise the system. The pressure should be approx 1bar or 14.4psi when the system is cold.

How long did you let the pump scream for before you switched it off?

[Seanl]

Ah cheers. Yeah boiler is in the airing cupboard in the upstairs landing. How do I re pressurise the system? There is no pressure indicated on the boiler, the dial and red indicator needle is at just over 1bar atm but the pressure needle is at 0. The pump must have run for about half an hour before I noticed it. :embarassed: Hope I've not buggered that!
Thanks Alex, appreciate it. 

[Toby]

Alex to the rescue 

Underneath the boiler where all the pipes are, depending on your boiler there should be a 15mm mains freed and maybe a silver flexible connector with a knob on, turn that till the preasure reg is around 1.5 bar the. Bleed the rads again just to get rid of any air, then check the gauge, as for yhe noise iv no idea!

Luke ........ f**k off 

[daz veedub]

toby lad 

my radiater in the conservatrie wont work ive bled it ,soon as a turn the key to bleed water comes out 

all other rads are fine

[justalex81]

toby calm down pressure when cold doesn't need to be more than 1 bar!

If the pump ran dry for half an hour there's a good chance you've burnt it out or very nearly.

daz veedub turn all the trv's off to all radiators in the house and leave conservatory open. does it get hot then? if so then it's a case of balancing all the valves on your rads so that the water is pushed through the conservatory radiator. if all the rads nearest the boiler have the valves wide open then the water will take the path of least resistance and just circulate around those. You need to shut the trv's down enough to still enable the radiators to get hot but also enough to force the water around the whole system.

[daz veedub]

toby calm down pressure when cold doesn't need to be more than 1 bar!

If the pump ran dry for half an hour there's a good chance you've burnt it out or very nearly.

daz veedub turn all the trv's off to all radiators in the house and leave conservatory open. does it get hot then? if so then it's a case of balancing all the valves on your rads so that the water is pushed through the conservatory radiator. if all the rads nearest the boiler have the valves wide open then the water will take the path of least resistance and just circulate around those. You need to shut the trv's down enough to still enable the radiators to get hot but also enough to force the water around the whole system.

cheers mate

what are TRV,S tho lol