Sime combi boiler / Alarm Clock.

[[Davey]]

My heating normally comes on around 6am, about 30 mins before my alarm so the house isnt like the antartic when I get out of bed..

Well I didnt need an alarm clock this morning, I woke up to BANG, BANG, BANG, CRASH, WURRRRRRRRRRRRRRRRRRRRRR and a cold house

After initially jumping about two foot above the bed and running down stairs with a baseball bat to confront what I thought was an intruder I discovered it was the boiler that had woken me up.

Anyway the boiler went silent (except for the timer ticking away).. So I turned on the hot water, the solenoid in-side clicked but the pump & fan didnt fire up... So I swithed it off at the mains and back on again and sure enough the pump fired for a few seconds (like it normally does, to build pressure I assume?)..

So I tried the hot water again, on came the pump, on came the gas, but after about 10 seconds all hell broke lose, the boiler was making rattling and banging noises and it cut out again..

I'm no boiler expert (by far) but it sounds to me like the fan has died?

Any ideas?

Cheers!

 

[twgas]

more likely no water in system than a nakkered fan

 

[[Davey]]

The boiler is showing water pressure on the guage and water comes from the hot tap at the normal rate (when the pump isnt running).

 

[[Davey]]

Do you know how much pressure it shoudl show? currently showing about 1.8 bar on the 4 bar gauge..

 

[twgas]

1 bar is enough cold,
noise is possibly circulation problem, check pump is def working

 

[[Davey]]

Thats about where its sitting when its cold.. But when I turn it on the pressure goes through the roof then it cuts out.. So not sure sure its the fan now

The pressure loop thingamy.. (not sure on the name), should the tap on it be completely closed or should be it open slightly holding pressure?

Cheers

 

[twgas]

The pressure loop thingamy.. (not sure on the name), should the tap on it be completely closed or should be it open slightly holding pressure?

Cheers

closed

 

[[Davey]]

Thanks its definitely closed off..

I've done a little video to show what happens when I turn on the hot water; the pressure starts to climb and then suddenly it cuts out with loads of noise..

<embed width="448" height="361" type="application/x-shockwave-flash" wmode="transparent" src="http://i118.photobucket.com/player.swf?file=http://vid118.photobucket.com/albums/o113/daveylc/Temp/boiler.flv">

http://s118.photobucket.com/albums/o113/daveylc/Temp/?action=view&current=boiler.flv