Help ! (boiler goes off and on)

[brolly]

Hi

We have a Worchester Bosch 350, the low pressure light kept coming on , so we have replaced the pressure valve, heating now working.
However some of the radiators are either not heating at all or not very well, we have bled system and balanced radiators.
The pilot light is igniting when put the heating on but then goes off after a few minutes then goes on again and keeps doing this but heating is still on (is the normal)
Has anyone got any suggestions.

Would greatly appreciate any help

 

[glasgowgas]

trapped air in system and boiler possibly

did you vent the pump??

 

[brolly]

trapped air in system and boiler possibly

did you vent the pump??

Many thanks for speedy reply,but Sorry do you know how I would do that!!

 

[glasgowgas]

check in the FAQs or the Wiki at the top of page

 

[brolly]

check in the FAQs or the Wiki at the top of page

sorry bit of a pest, new to website and cannot find what i am looking for

 

[glasgowgas]

//www.diynot.com/wiki/plumbing:faq:faq9

if that doesnt send ye to it its.....

wikki

FAQs

bleed ch pump

 

[brolly]

//www.diynot.com/wiki/plumbing:faq:faq9

if that doesnt send ye to it its.....

wikki

FAQs

bleed ch pump

you are a star, thanks will give that a try

 

[brolly]

//www.diynot.com/wiki/plumbing:faq:faq9

if that doesnt send ye to it its.....

wikki

FAQs

bleed ch pump

you are a star, thanks will give that a try

well that did not work, any other suggestions? should my pilot light be on the whole time the heating is on or should it go on and off? sorry i know i am a pest

 

[Agile]

Pilot always on for your old boiler.

I am a little concerned that your knowledge seems a little weak for me to be sure that you have properly balanced the rads!

Did you do it as per the FAQ ?

Tony

 

[brolly]

Pilot always on for your old boiler.

I am a little concerned that your knowledge seems a little weak for me to be sure that you have properly balanced the rads!

Did you do it as per the FAQ ?

Tony

Yes i printed off the instructions of the link in faq and have follwed instructions on that. although we closed them all off and then done them one at a time.

i really do appreciate any help (incase you have not guessed i am a woman)

 

[glasgowgas]

ok when you say your pilot is off then on then off then on

does that mean you are having to relight pilot manually?

 

[brolly]

ok when you say your pilot is off then on then off then on

does that mean you are having to relight pilot manually?

no it is relighting itselft, it seems to stay on for a couple of mins then goes off for a couple of mins then comes back on for a couple mins then just continues like that

 

[glasgowgas]

is the pump actually turning?

go back to do what you did to vent pump, but take off the vent screw, put teatowel under the pump as you will get a wee bit of water dribbling, and check the shaft inside is actually turning round when the ch is running

you have filled system to between 1 and 1.5 bar and vented all rads and pump?

both isolation valves under the boiler are open?

 

[Agile]

I think you mean the main burner lighting, not the pilot which is only a very small flame.

I did not know if you were male or female but now I know that you are a woman then it makes me no more or less helpful.

If you turn off ALL the rads except the cold one then what happens?

Try turning pump speed up to "3".

Tony

 

[brolly]

I think you mean the main burner lighting, not the pilot which is only a very small flame.

I did not know if you were male or female but now I know that you are a woman then it makes me no more or less helpful.

If you turn off ALL the rads except the cold one then what happens?

Try turning pump speed up to "3".

Tony

sorry it would be the main burner then, if all other rads off then cold one heats up