My Potterton Neataheat boiler cuts out as soon as Radiator Heat is required. It is fine when just hot water is called for. New controller - no change Have set Motorised valve to 80% CH and 20% HW and am getting away with this by setting room Thermostat to 0. Any ideas as to WHY? I think there is a relay close to the Water Tank which I have not checked but still cannot understand what could be wrong. Is there a general wiring diagram for this anywhere? Any advice gratefully received
- posted
18 years ago