Boiler heating up but not getting through to central heating or hot water

[Kevdiy123]

Hi
A bit puzzled at the moment.
I removed a section of central heating pipe that had a screw put through it.
Since then we have had no hot water or central heating. To solve the issue so far I have done the following:
- Bled all the radiators (alot of air released from those near the fixed pipe bit now all radiators are running water through them - but not hot)
- Drained the boiler at the release valve to see if any air was trapped.
- Turned up boiler and heating to full.
- checked diverter valves and they are working as normal.

Also took to front off boiler and at the source it is heating water (pipe hot to touch) but a few feet down the pipe it is only warm and then a few feet more it is not warm at all.

Anything else I can try.

Thanks on advance

Kev

 

[CBW]

Hello Kev,

what type of setup? Ie; Combi boiler, system boiler, heat only? Controls?

 

[oldbutnotdead]

As above, do you have header tanks and a hot water cylinder?
Is the pump running when the controller is calling for heat?

 

[Kevdiy123]

Set up attached.
I have reset my nest panel and hot water is now leaving the boiler but not making it to the diverter valve pipes.

 

[CBW]

Sounds like there’s still trapped air, possibly at the pump, and the makeshift air vent (the drain off pointing upwards) at the cylinder. There‘s a possibility that removing the cover on that boiler requires checking for safety afterwards too.

 

[oldbutnotdead]

When you say 'diverter' valves presumably you mean the motorised valves in pic 2?
Is the pump running? Are the valves operating?

 

[Kevdiy123]

Unbelievably, it was just the reseting of the nest controller that got it working. There's a day I will never get back.

Thanks for the suggestions