RE: FN-FORUM: [OT] gas boiler problem

date posted 2nd January 2004 14:45

I had a similar problem before, and I think Tony is right that the overflow
pipe is when the water pressure is getting too high. Assuming that this is
a combination boiler...

When you noticed the pressure was too low and released more water in to the
system, is there any chance you might have over-filled it or accidentally
left it so that more water is constantly getting released in to the system?
You shouldn't really have to let more water in to the system like this, it
should be taking care of itself. Plus, if the water pressure is low on the
heating system - that wouldn't have caused your hot water to go off!

Either way, if the pressure is now too high, I think you run the risk of
water flooding the boiler. I had this happen to me before, and it ended up
with water dripping on the electrics in the boiler and one almighty bang and
all the power tripping out. Quite annoying when you're in the shower...

Get a plumber!

-----Original Message-----
From: [EMAIL REMOVED] [EMAIL REMOVED] Behalf Of Tony
Crockford
Sent: 02 January 2004 15:15
To: FN-FORUM / [EMAIL REMOVED]
Subject: Re: FN-FORUM: [OT] gas boiler problem



On 2 Jan 2004 14:44:29 -0000, [EMAIL REMOVED] wrote:

> Now in the great tradition of this forum and it's many OT posts, can
> anyone
> help me out? :)
>

You've got a pressurised system by the sound of it, usually between 1 and
2.5 bar (1 when cold, up to 2.5when hot - heat expands the water.)

it might be you have a massive airlock - have you bled off air from the
radiators? but it sounds like a safety feature has erronously triggered.

Not wishing to be the harbinger of doom, but my understanding of the
"overflow" pipe is that it's there to release excess system pressure - e.g
when the boiler just keeps on heating the water and might explode. It
sounds like the valve that lets excess pressure out has opened, and while
it's open the boiler won't fire up as a safety feature.

I'd call a plumber sharpish, with parts delays and all it might be days
before it's fixed?

good luck anyway...



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