HW & CH not working after being turned off

[mickwombat]

Hi,

I have just returned from a two week holiday. Before I left I turned the timer (Siemens RWB9) off so as not to waste gas (& money) while I was away. When I returned, I turned the timer on. The boiler (Potteron Profile 40NG) fired up briefly for about 5 seconds and then went out. It has since fired up a couple of hours later but again only briefly.

Why is it that the water is not heating up. Everything was working fine before I left and now have to have cold showers.

Do I need to do anything like adjust the pressure or is there something I'm missing?

Thank you

Mick

 

[ArtfulBodger]

If the boiler fired at all then the motorised valve and at least the cylinder thermostat are probably fine. I would be checking the pump at this point. If it's not running the boiler will quickly overheat and shut down.

If you do a search on this forum there is loads of advice on how to check a pump.