Ferroli combi boiler thrwing water out of overflow
- Thread starter Robbie uk
- Start date
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have they left the filling loop open ?
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Depends, you need to drain some water out of the system first to stop it leaking out of the blow out then do a few tests.
Get the pressure back to 1.5 bar then disconnect the filling loop to see if its passing water, if it is then it needs replacing.
If the filling loop is fine then, you should turn on the boiler and watch the pressure, if after a while when the boiler is on the pressure starts rising rapidly then it suggests that either your expansion vessel needs re-pressurising or the tube to it is sludged up and blocked. You can put a foot pump on vessel to pump it up to 1bar (make sure boiler is drained of water)
If the pressure is rising constantly when the boiler is off and filling loop disconnected, then you need to isolate the cold mains into the boiler. If the pressure stops rising with the cold isolated then its a pin hole in the hex
Get the pressure back to 1.5 bar then disconnect the filling loop to see if its passing water, if it is then it needs replacing.
If the filling loop is fine then, you should turn on the boiler and watch the pressure, if after a while when the boiler is on the pressure starts rising rapidly then it suggests that either your expansion vessel needs re-pressurising or the tube to it is sludged up and blocked. You can put a foot pump on vessel to pump it up to 1bar (make sure boiler is drained of water)
If the pressure is rising constantly when the boiler is off and filling loop disconnected, then you need to isolate the cold mains into the boiler. If the pressure stops rising with the cold isolated then its a pin hole in the hex
Could just be the toilet overflow that is running 
one pipe sticking out the wall is the same as the next to the uneducated
one pipe sticking out the wall is the same as the next to the uneducated
Certainly not
Your tennants.
Your tennants.
its due its cp12 so i am sure your RGI will pick it up
as long as they are told the boiler is faulty before they go, as too many post on here saying they gat asked to do a safety check only to find the boiler faulty when they get there
Great thread! I followed (more or less!) the hints, and found that having checked the fill loop (don't they have a lot of water in them!) and flooded the kitchen, that even with the mains water locked off, the pressure still goes to 4 bar. Hmmm.
So i popped the cap off the pressure tank valve, and pushed the core....it's full of water.
This suggests to me that the vessel itself is f*****d, do we have a consensus?
They are in stock at Spares and Controls in Kings Norton, £75 + vat.
What are they like to fit?
It seems to have a connection to the pump, can't see much else as it's up a corner.
So i popped the cap off the pressure tank valve, and pushed the core....it's full of water.
This suggests to me that the vessel itself is f*****d, do we have a consensus?
They are in stock at Spares and Controls in Kings Norton, £75 + vat.
What are they like to fit?
It seems to have a connection to the pump, can't see much else as it's up a corner.
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