some boilers overheat when on maximum, the potterton profile is a common cause of this - I know it;s designed to but it just doesn't - like isolation valves under the boiler are designed to be used to change a part without draining down whole system etc - but we know these are not always straightforward too!
Potterton Suprima 60L keeps turning off with Green Flashing
- Thread starter jemthebullfrog
- Start date
some boilers overheat when on maximum, the potterton profile is a common cause of this - I know it;s designed to but it just doesn't - like isolation valves under the boiler are designed to be used to change a part without draining down whole system etc - but we know these are not always straightforward too!
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Im giving up.
How do I drain the system apart from at a bleed screw on a radiator?
try bleeding a radiator at top floor level and see if water keeps flowing, if not could be a blocked cold feed, if there's water in the header tank.
also could be some air in the system so check that too
petitpablo: if air was in the system or a lack of water would that not cause an oerheat situation and lockout? Only asking as you seem to know your stuff
also could be some air in the system so check that too
petitpablo: if air was in the system or a lack of water would that not cause an oerheat situation and lockout? Only asking as you seem to know your stuff
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petitpablo: if air was in the system or a lack of water would that not cause an oerheat situation and lockout? Only asking as you seem to know your stuff
Depends on the layout of the pipework. If there is a decent rise on the pipework coming away from the boiler then the heat will gravitate away from the boiler and cutting in and out on its thermostat. The OH stat on a suprima is right next to the primary sensor rather than in a phial within the heat exchanger like may are.
try bleeding a radiator at top floor level and see if water keeps flowing, if not could be a blocked cold feed, if there's water in the header tank.
also could be some air in the system so check that too
petitpablo: if air was in the system or a lack of water would that not cause an oerheat situation and lockout? Only asking as you seem to know your stuff
Ok, so i'm bleeding a radiator and the water is still flowing with no air coming out of the bleed screw.
I bled the radiators yesterday.
has this problem occured since you bled the radiators?
No, it's been doing it for a while.
I would still be suspicious of the pump then. Noise doesnt indicate that its running well.
What is the best way to test the pump?
If its running, then by substitution.
What speed setting is it on at the moment?
What speed setting is it on at the moment?
I cycled through the three settings, and it's on the highest one.
Are your DIY skills up to removing the pump to check it?
They should be, I'm an audio engineer, so pipes, water, wires, they're all the same to me!
LOL
Turn off the pump valves and remove the pump. You will have too catch a small amount of water. Fingers crossed the valves shut off! Connect it to a flying lead and see how it runs briefly.
Turn off the pump valves and remove the pump. You will have too catch a small amount of water. Fingers crossed the valves shut off! Connect it to a flying lead and see how it runs briefly.
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