Hi All,
First post, from a competent, trained Electrical engineer and ex Service engineer, DIYer and hobbyist.
The boiler Glowworm Ultimate (downstairs kitchen) has suddenly decided to pop the overheat trip.
Never done it before and its not the first time weve run the heating this year or anything, just happened out of the blue.
Pipework around the pump (upstairs airing cupboard) (Grundfoss 15-50) very hot an seems pump is running.
Nevertheless having given it a "tap" and removed the bung screw its definitely spinning.
Ive set the 2 way valve into the manual position
Ive bled all the rads (didn't need doing, no air in them at all)
There's heat getting into the bathroom tall towel rad, but very little in the others upstairs and the downstairs ones are all cold.
The system was drained a year or two ago and inhibitor put in , the rad bleed water is crystal clear
There is water in the loft fill/expansion tank
So after a reset the boiler fires up fine until, again, it trips.
And thats what my wife greeted me with as I came home from a couple of days working away!
So I'm a bit stuck now what to do next.....
My next DIY thought, is that the pump impeller may have failed, though I cant find anything bad about these on the net?
So I'd be grateful for any other input please?
Thanks in advance
Colin
First post, from a competent, trained Electrical engineer and ex Service engineer, DIYer and hobbyist.
The boiler Glowworm Ultimate (downstairs kitchen) has suddenly decided to pop the overheat trip.
Never done it before and its not the first time weve run the heating this year or anything, just happened out of the blue.
Pipework around the pump (upstairs airing cupboard) (Grundfoss 15-50) very hot an seems pump is running.
Nevertheless having given it a "tap" and removed the bung screw its definitely spinning.
Ive set the 2 way valve into the manual position
Ive bled all the rads (didn't need doing, no air in them at all)
There's heat getting into the bathroom tall towel rad, but very little in the others upstairs and the downstairs ones are all cold.
The system was drained a year or two ago and inhibitor put in , the rad bleed water is crystal clear
There is water in the loft fill/expansion tank
So after a reset the boiler fires up fine until, again, it trips.
And thats what my wife greeted me with as I came home from a couple of days working away!
So I'm a bit stuck now what to do next.....
My next DIY thought, is that the pump impeller may have failed, though I cant find anything bad about these on the net?
So I'd be grateful for any other input please?
Thanks in advance
Colin
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