J
John T
Hi
Ive just changed the Honeywell (V4073A) motorised valve in my central heating (Y system). It has a new Honeywell programmer (ST69)as well and if both heating and hot water are on together the heating goes off when the hot water thermostat turns off. If i isolate the hot water system on the programmer the heating works fine . As soon as i have it working together the hot water thermostat keeps over riding the heating. I am sure the wiring is correct.
All help appreciated.
regards
John T
Ive just changed the Honeywell (V4073A) motorised valve in my central heating (Y system). It has a new Honeywell programmer (ST69)as well and if both heating and hot water are on together the heating goes off when the hot water thermostat turns off. If i isolate the hot water system on the programmer the heating works fine . As soon as i have it working together the hot water thermostat keeps over riding the heating. I am sure the wiring is correct.
All help appreciated.
regards
John T