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Look like the same type of pressure sensors on domestic water pumped systems. I would hazard that the are under and over pressure sensors to cut out something.

Looking at it I would say probably age and poor installation as it is a very old Fortic also check the overflow connection at the top. Quality piece of work! But where is the split as said????

It is a pressure gauge not temperature. should be about 1bar cold. Probably expansion vessel needs topped up and a sticky fact at top of page will tell you how to do it.

The white cover on the top of the boiler, probably on sprung clips. If the flexi is not there it wil be somewhere else on the system close to the boiler, maybe in a cupboard.

I take you mean water pressure? Lift the top cover off and there might be a braided flexible hose there with and valve at each end. One in cold mains in the other connects to the heating circuit via the flexi hose. Fill until pressure gauge reads about 1 to 1.5 bar cold then turn off and fire...

Good luck with getting it fixed as parts are very few and far between.

Yes it will be fine. Wires are the same colours but the body will have different nuts than the honeywell one so use the complete contents of the Iflo box. Mind and get it going in the right direction. Honeywell goes from A to B and iflo follow the arrow.

Me, I would check that I have oil first and the fire valve has not tripped or any valve off then look at the burner.

Warmflow don't do the seperate air intake part now but yes you could do that if you want but fit a grill and duct to flexi. Mind and blank off the old intake from the flue on the top of the boiler.

You've a problem with the balance flue. Flue gasses are mixing with the intake air so not enough oxygen to keep the flame stable. At worst the flue needs replaced if still available.

Holiday let what about electric boiler with off peak HW. No servicing, no oil or gas to worry about. I know it takes some work away from our trade but find quite a few lets do this as it's easy to maintain.

Glowworm Ultracom2 30CXI, Sister company of Vaillant excellent combi and usually cheaper than Vaillant.

Isn't a Mira Event a pumped shower. If so is it wired up, is the water on(valves open). Put shower head down low so it may help clear any air lock. Turn it on?

Change the loo role to a different brand.

Think a max of 21kw input and about 16kw output but someone will correct if I'm wrong.

Depends on which model of boiler behind the fire and how old. It could be a small 401 or 552 which from memory range from about 8kw to 19 kw.

That's what I said on the reply post!!!!!

Ultracom 2 has tap and rad symbol on a system boiler which has a hot water tank. It is also a condensing boiler that is where the confusion may lie.

SXI is a system boiler so it must be an motorised valve somewhere on the hot side faulty. I take it's the Ultracom 2 with the tap symbol and you have either a seperate programmer or the small one fitted to the boiler.

I was drilling a pilot hole last week and burnt the end off of a 10mm and 12mm x 450mm SDS bit. Never happened before not even in granite. Turns out cottage built of whin stone and drilling with the grain. Powder is very fine but abrasive. Had to get a hilti bit and much larger as seems to get...