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Glow worm 24ci overflow pipe

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Hi,

My glow worm boiler seems to be working as normal but I am getting a constant pouring of water outside from the overflow pipe, any ideas what I should check?
 

Darren Jackson

Esteemed
Plumber
Gas Engineer
Hi Snapper, 2 possible scenarios.

A, The PRV is letting by & needs replacing. Or
B, The heat exchanger has split and needs replacing.

Unfortunatley you will require a GSR engineer to repair either of the above problems.

What model is the boiler?
 

Darren Jackson

Esteemed
Plumber
Gas Engineer
If it's a constant pouring and the pressure is ok and not frequently having to top it up. Then it points to a split Hex and the mains water is leaking down the condensate pipe. So unlikley to be the PRV as you would need to be topping up the pressure all the time.
 
It’s running all the time even when the boiler is off. Does it sound like I’ll have to get someone in to look at it?
 

Darren Jackson

Esteemed
Plumber
Gas Engineer
I've had a few of these heat exchangers go. they are in my oppinion not worth repairing as it at least £500+ to repair it. Better off putting the money towards a new boiler I'm afraid to say.
 

Darren Jackson

Esteemed
Plumber
Gas Engineer
It’s running all the time even when the boiler is off. Does it sound like I’ll have to get someone in to look at it?
Yes get a GSR in first to make sure it is not just something simple. But it does sound like the hex has gone.
 

Darren Jackson

Esteemed
Plumber
Gas Engineer
One way to check yourself is to turn the cold water off either under the boiler or at the mains stop cock, and open a hot water tap to relieve the pressure and if the condensate pipe stops running or slows to just a drip after a few mins then you can say that the hex has gone and it's a new boiler unless you want to spend a large sum of money repairing it.
 
Hi, I tried that but it’s still coming out the pipe. Actually I’ve just noticed that 2 of the radiators are stone cold and the boiler has been on for a while now.
 
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