had it 6 years not firing up when demand for heating or hot water but does come on for intervals of 10 sec every 5 mins or so the burner light trys to come on but just a flicker it happened before christmas but seemed to rectify itself can you help thanks. bled rads,took air out pump cleaned...
can anyone help had bolier 5 year 4 weeks ago noticed water running hot and cold heating not at full temp noticed when system clicked on everthing normal except burner only come on for 10 sec then out and like trying to get on again and eventually come on for another 10 sec does not even come on...