Hello I hope somebody can help. Our oil fired central heating isn't working properly. Boiler fires up and runs briefly but seems to be in good working order (serviced in March and has been run all summer on hot water only) DH has changed the limit stat and water stat on the boiler and also changed the pump but we are only getting some heat upstairs. Could there be an electrical fault in as much as the pump is not starting? We used to hear the pump start to pump the water around the system but now there is no noise. Room stat maybe although that still 'clicks'? Control panel which is on the boiler (7 years old)