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A Y plan could work. Why would this not have been done in the first place? Excuse my ignorance but can a Y plan heat both immersion and rads at same time?

Confirmed - the boiler running the pump but not firing. T

The bypass is adjacent to the pump in the airing cupboard 5 metres away (ten metre flow & return). It would be tricky to fit a rad. This should be unnecessary as the boiler did not overheat before the bypass valve was fitted when there was a gate valve that was partially open. The auto...

Both valves closed it still runs. If hot water cylinder demand met, then heating demand met, both valves close and pump continues to run on a cooling circulation I guess determined by the boiler. I'm pretty sure the pump is wired to the boiler.

Unfortunately each time it boils its probably creating air in the system.

It'd be easy enough to drain from the boiler see what comes out. The boiler is downstairs, the pump & bypass are in the airing cupboard are upstairs. Sediment could be sitting in the boiler.

I need some ideas on diagnosis of an overheating boiler in a conventional vented central heating system. The system has two valves controlling heat circulation through radiators and a water cylinder respectively. When either of these two valves closes, without the other valve being open...

Thanks for the advice - I'll be having a look at the options over the next few days and discussing with the electrician. I like the look of the Iconfan and can see that installation will be very simple - as long as it runs quiet! Cheers

Thanks for the responses! Preference is to not have any noise - I can't stand the sound of a extractor fans. Whilst in the shower there's plenty of ambient noise - in the bath... Maybe my experience of extractor fans are bad ones - are there almost silent runs available? I have option...

Thank you for the advice. A flow switch would work and be ideal and an overide switch could be in circuit for a non-shower user to use the fan. A humidistat would work but as you suggest I would want to be able to isolate it when taking a bath.

I'm looking for an extractor fan for bathroom/shower room. Ideally I'd like it to operate only when the shower pump operates with a timer to overun. Does anyone know of a product that will connect in this way? Thanks

Thanks for the offer Allan but I've already got a kit.

Had a look at the Combiforce - fell off my stool - lot of money £224. Control came off a treat this morning albeit with a big hole in the wall. Stripped it on the bench - this thing is built so well I'm not going to scrap it. I'll buy some new plastic trims and fit the service kit then...

Thanks - I'll shall remove the assembly tomorrow. Hopefully it'll be serviceable and can go back on. Suspect I maybe better off fitting a new shower control. Any recommendations on a make that will have a similar footprint to cover the holes left by the Mira?

Its the one with the square type unions. I'll have a go tomorrow. Thank you for the advice!

Thanks for the reply BingoBongo Its exposed type. To confirm - its the allen key accessible from under the valve body and the two 15mms nuts are the ones going into the tiled wall?

Anyone tell me how to remove a Mira 88 please. I don't want to crack the surrounding tiles.

Please ignore - duplicated post

I have a Mira88 with a leak from the centre spindle. Based on experience with another property I went ahead and bought a service kit and new knobs. Trouble is this one hasn't been apart like the last one which was only a couple of years old. This one I can't rotate the big nutted cover...

The Monsoon's been in the loft a year and is doing really well for a secondhand unit. Its as quiet as it was and really is unobtrussive - not as loud as vacuum cleaner. All I did as a precaution was to mount it on the slab - an acoustic box was unnecessary. Only thing an issue is the way...