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
Potterton Neataheat cuts out as soon as Radiator Heat is required
Oct 18, 2005
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Information here may be outdated?
Try the main FAQ. I bet it's a failed three port valve?
Thanks for the suggestion. It turned out to be the 3Amp fuse in the Sunvic Terminal Box which also contains a relay I cannot think why the Hot Water would still fire up the system Maybe my wiring is wrong?
Ed Sirett wrote:
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