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Thanks, I've tried balancing using the lock shields on each radiators but with no great effect – the CH system as it is is pretty much as it has been for 30/40 years+ probably – it doesn't seem to be a true “feed and return” system as it were though with each radiator just T'd off the supply...

Back at my parents to try and sort out “Cold/Cool” radiators downstairs...well trodden ground I know, sorry ! Basic Semi; Ideal RS330 boiler – all radiators on one zone, 4 upstairs (2 small) and 3 downstairs so nothing really that should cause issues. Upstairs all hot, downstairs all pretty...

As mentioned post an actual picture of the valve that controls your CH - would help. If moving the lever manually triggers the microswitch and turns the boiler on them it would seem your electrical circuit seems to be OK. Maybe the synchro motor has failed, if you can remove the cover and you...

By way of follow up & just in case anybody in the future might be looking at a similar issue of worn gear teeth on the plastic cam in these that results in it slipping and giving a constant knock throughout the pipework and comes across this thread..... The BOSS Therm BZV22 valve is badged...

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Thanks for the reply Chris. I'm not sure it will though unfortunately - this mentions compatibility with the “Metal Head” BZV22 whereas this dead unit is an older Plastic Head BZV22 - several questions on the product page asking if compatible with the older plastic one with the answer no. It's...

Bit of a long shot...don't suppose anybody has, or knows of any of these “old” Boss Therm (BZV22) 2 Port 22mm valves gathering dust by chance, trying to get hold of one seems a tall order ? Needing to replace one for a relative as the plastic gearing has worn so it doesn't open completely...

Yep, unfortunately they are John. I wish it had come into mind before it was poured ! Thanks.

Hi All, Looking to fit a new hardwood driveway gate to be hung off a new stone pillar - yet to be finished but new walling in progress. Going to add add strength to pillar by putting a steel box section post on a plate and fix to footings and building pillar around and fill cavity. Any...

Thanks for the input Meldrewsmate - it doesn't seem to be leaking at the moment although there does appear to be a fault line close to the sump cover. I have a new one as mentioned above to replace. Rgds

Thanks again Shambolic - I've now picked up a new replacement sump (not cheap !) - will look to replace as soon as I can although it looks like a little more work to gain access. Rgds

Hi Shambolic - thanks, yes I did fit a new turbine (175661) initially but didn't seem to sort it and I couldn't see the red LED solid or flashing when taps turned on. It now has a new turbine and sensor and all appears ok. There also seems to have been a leak looking at the bottom of the...

Follow up to my own post above I went back out for a sensor and that seems to have worked but whether it was that alone I don't know now as the new turbine is in – either way we now have DHW again ! (and initially it seems a little hotter to me) Thanks

Thanks for the input – picked one up locally today and fitted. Sadly no change, still no DHW. Is it going to be the actual sensor on top of the turbine that could be the culprit ? I can't see any LED illuminated or flashing on top with flow. Rgds

Hi All, We seem to have lost our DHW from our C30 this evening. Hasn't been an issue before. With CH burner ignites as required and all seems OK but we have no DHW - Burner just doesn't ignite. Can't see any LED flashing or illuminated on top of the sensor when hot water taps turned on so...

Hi All, Am trying to locate a Motor/Actuator that might fit my parents 2 port CH valve.... It is going back a few years and my Dad has already replaced the gears at some pint in the past as he has a couple of “cannibalised” units as per the pictures below. Units are PTS branded BOSS BZV22 but...

Thanks again for the input....my Dad has found some of his original paperwork including the Satchwell installation sheet so I have a some stuff to go through. The timer in question appears to date from 1978 so coming to 40 years service - good until recently ! Boiler is an Ideal RS330 (or 360)...

Thanks Oil.

Sorry for late acknowledgement – thanks for the input. Set up is an Ideal boiler with two Boss Therm BZV22 valves - one for CH and one for HW, they in turn switch the boiler on and in the case of the CH the pump too. Both valve motors have been changed a couple of times I'm sure as the plastic...

My Dad suggests it does date back to the previous Boiler so yes a 30+year timescale since original install would probably fit but its been working without fault during that time. Thanks..