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by AlanChafer
Tue Dec 13, 2022 2:59 pm
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: Central Heating Programmer Issues
Replies: 4
Views: 1139

Re: Central Heating Programmer Issues

Yes, it was the motorised valve a British Gas engineer fitted a new head today. They were bemused by the way it was behaving and had not seen those symptoms before. However, a new head sorted the problem. The Hot Water and Heating now operate independently of each other, or the valve adopts a mid-po...
by AlanChafer
Fri Dec 02, 2022 1:48 pm
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: Central Heating Programmer Issues
Replies: 4
Views: 1139

Re: Central Heating Programmer Issues

I would guess the V3 micro switch inside the motorised valve has failed, you may be able to renew just the head, but until fixed if you latch the bleed lever on the motorised valve it will likely mean heating will work. Can't leave it like that, as in the summer when there is a call for DHW the CH ...
by AlanChafer
Fri Dec 02, 2022 9:44 am
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: Central Heating Programmer Issues
Replies: 4
Views: 1139

Central Heating Programmer Issues

Since turning the heating on this winter, the central heating programmer (Drayton UP2) is not working as it should. All other parts of the system seem to be working fine, the boiler boils (Worcester Bosch Greenstar Ri), the pump pumps and the diverter diverts. Both room and hot water tank thermostat...
by AlanChafer
Wed Jan 05, 2022 3:40 pm
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: Replacing Old Radiator Thermostats
Replies: 8
Views: 1885

Re: Replacing Old Radiator Thermostats

The sample adaptor and valve from
https://www.heatingcontrolsonline.co.uk ... aptor.html
fitted easily and I have now replaced all nine valves successfully. Picture attached of adaptor in place.
by AlanChafer
Wed Dec 15, 2021 2:37 pm
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: Replacing Old Radiator Thermostats
Replies: 8
Views: 1885

Re: Replacing Old Radiator Thermostats

I have found a company that sells converters from the old 28mm size to the new 30mm, allowing me to then fit a modern valve.
https://www.heatingcontrolsonline.co.uk ... aptor.html
I have ordered one up to try it out and if successful will follow this up with a bulk order for the remaining radiators.
by AlanChafer
Sun Dec 12, 2021 10:46 pm
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: Replacing Old Radiator Thermostats
Replies: 8
Views: 1885

Re: Replacing Old Radiator Thermostats

Thanks, I have been trying that but have yet to find one that fits.
by AlanChafer
Sat Dec 11, 2021 3:18 pm
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: Replacing Old Radiator Thermostats
Replies: 8
Views: 1885

Replacing Old Radiator Thermostats

I have a modern boiler and controls but very old radiator thermostats, a number of which no longer work. I have taken the heads off and the pins move freely enough, so I thought changing the heads should sort this out. Unfortunately, the fitting does not seem to conform to modern standards and I am ...
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