Ravensheat Boiler pressure dropping rapidly

iqi · 17 Jun 2004

My Ravensheat RSF 820 / 20 combi boiler is losing pressure very quickly.

It says on my boiler the pressure should be maintained at 1.

When the boiler is running the pressure stays but as soon as it turns off the pressure just goes down rapidly and straight to zero and the pilot also goes out.

Please can advise what the problem is and if anyone else had a similar problem with their boiler.

Thanks in advance

Iqi

Bahco · 18 Jun 2004

You could be losing pressure at the pressure relief valve (may need reseating / replacing ) or have a leak somewhere in your system.
Check all joints.

iqi · 21 Jun 2004

Thanks Bahco,

Where would the pressure relief valve be on the boiler,

Is it something easy to do or an engineers task.

Thanks
Iqi

Flack · 21 Jun 2004

Sounds like to me that if it has an expansion vessel fitted then this might be the problem, does your pressure gauge go very high when the boiler is running?. if it has one fitted it will have a tyre valve fitted to it, just do a quick check with a small screw driver on the valve and see if water or air comes out. If water comes out then your expansion vessel is u/s.

Flack

iqi · 22 Jun 2004

When the boiler is running the pressure does not go very high, between 1 and 2.
As soon as it is turned off it goes to zero within 5 minutes and soon after the pilot goes off too.

Quote 'If water comes out then your expansion vessel is u/s' - what does u/s mean?

Thanks
Iqi

IanDB · 22 Jun 2004

Un-servicable. Broken!

darkwolf · 25 Jun 2004

Sounds like a similar problem to my boiler.
I located a small valve on top of the boiler similar to a dustcap and it was loose.
I retightened it but the pressure hasnt increased since, is there a way of re-pressurizing the system or should it happen naturally?

iqi · 28 Jun 2004

Yes, I found the cap too on the top of the boiler, more like a cap on your car tyre.

The only reason I found this was cos it started making a hissing noise from the top, the cap had completely come off.
I had this screwed back on but the pressure is still dropping.

I have to manually increase the pressure.

croydoncorgi · 28 Jun 2004

STOP!

If you just tightened the dustcap on the automatic air vent - you have stopped it from working.

If you tightened something else - well, I have absolutely no idea what will happen next!

If you have no manual for the boiler then I strongly suggest that you should get a professional to fix it. What you are doing is potentially dangerous, probably illegal and (after several days) clearly not fixing your boiler!

diynot

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.

Are you a trade or supplier? You can create your listing free at DIYnot Local

Ravensheat Boiler pressure dropping rapidly

Similar threads