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I shall measure it but not sure what to expect.

AFAIK, it is correct as it is a particular short one. Bought from a local plumber's merchant but I can't recall the packaging to be totally sure.

I have replaced the Thermocouple on my otherwise bombproof 15 year old Baxi Solo WM 50/4RS for the second time in 18 months. So now I'm wondering if there is anything else I should be looking at (eg injector) that may be causing the failure of the Thermocouple. Any ideas :?: Or just a dodgy...

Hi ianniann Interesting info there. Thanks. The radiators actually seem to be somewhat over-spec (large) and they don't "feel" to have reached full temp before the cycling starts. Is that consistent? Or could it be something like sludge in the pipes slowing the flow? The system was drained...

Both pipes hot. With Water only the cycling starts after about 10 mins, 2mins on/1 off. I just tried with both water and ch on, all TRVs full on, room thermostat up to 30, boiler started cycling after 25 mins and the cycle time is longer, about 4 mins on/1 off. Pump is set to "2".

The cycling happens when either CH or water is on. Not sure when it started. I only noticed it last year and as it doesn't seem to affect performance didn't think much of it until recently. Perhaps I should try putting the heating and water on simultaneously and see if it does it. His...

Hi Agile I used D_Hailsham's link to the calculator. It gave 2Kw default for water, as you say, which I increased to 3Kw as the cylinder is quite modern (Salton Premiere).

Wow! Thanks for the great responses. Truly appreciated. :D Using the Boiler Size Calculator, and allowing 3Kw for the water, I get 14Kw. Last winter the house was perfectly warm but we don't use all the rooms and I time the water to come on at seperate times from the heating. I'm...

I rent a 4 bed semi (9 rads and 1 bathroom, open vent CH but mains pressure water cylinder) with an ageing Baxi Solo WM50/4RS (12Kw) boiler. The boiler has been cycling (on for 2 mins, off for a min) and sometimes intermittently making a clicking sound (sounds like a solenoid). I asked the...