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4 weeks?......DOH! I remember reading 2 hours on the back of the Sentinel carton - but having just been to the Sentinel website, it does say 4 weeks. As it's August and we don't have the rads on, I'll tollerate the cycling for a few weeks and stick another X400 in mid-September. Like you...

Mick, thanks for your perseverance - it is appreciated. No, we don’t have a contract with BG. Only a small amount of air is released, but there’s definitely air there for sure. The x400 was in the system for about 3 hours with all the radiators on full blast and very hot. We then drained the...

Yes, we do have a F&E tank in the loft.

twgas Most daily visits to the airing cupboard valve will remove a small amount of air, but not much. Most mornings, when the HW comes on, air can be heard in the one of the two pipes (if not both?) above the boiler. Air can be also be heard (and felt) bubbling in the HW pipe that runs from...

Oh, I see. In that case, we have a gravity fed system.

Thanks for the quick reply. The boiler was serviced 18 months ago and was briefly checked by a heating engineer 3 months ago he said it was spotless. To be honest, the cycling problem was never really a major concern at that time or previously, but it's now a complete irritation because I know...

Hi Sorry guys - another cycling boiler problem, and it's driving me crackers! We have Glow-worm 50FF Fanned-Flue boiler. For the last year or so, when the boiler comes on to heat either the H/W or C/H or both, the boiler stays on for 10 minutes continuously, and then goes off for...