H/L reset light on a warmflow boiler

[chicken5812]

There is one hot pipe coming into them both and both pipes out are cool. What else do you think it could be. Thanks.

 

[chicken5812]

Thanks, one pipe going in to them both is hot both pipes coming out are cool. what else do you think it could be? Thanks.

 

[dontknowitall]

Quite possibly the thermostat on the boiler as mentioned at the beginning. Perhaps a wire in the wiring centre? Perhaps a zone valve (depending on how it's wired and affecting the other zone valve)?

Could be one of a number of things. Sounds electrical in some way though, unless it's the expansion vessel.

 

[chicken5812]

Thanks, sounds to complicated for me, guess i'm going to have to bite the bullet and get a plumber.Thanks again for your help.

 

[SimonG]

What's the pressure gauge read when cold?

 

[Millsy 82]

What pump is it? does it have a name on the front? Are the pumps joined together water comes in pipe comes out the side of the first then joined to second then pipe out as it might still be a pump problem.

Also have you carried out any work on the system ie removed rad as you might have an airlock in the system.

 

[chicken5812]

when its cold the pressure gauge is zero

 

[chicken5812]

Grundfos pump and yes they are joined together. I've recently bled the radiators, I think it could be an airlock but don't know how to bleed the boiler, can you let me know?

 

[dontknowitall]

Have you tried filling the system with water until the gauge reads about 0.7? Normally, the gauge should read around 1.1bar or so (and hold there during firing).

 

[dontknowitall]

Bleedin' boilers ...

Somewhere will be a filling loop which is a length of braided pipe around 1 foot long or so. At the end of it there will be a black plastic piece which you turn 1/4 turn, like a tap.