Baxi 105E Combi Boiler (18 months old only), continuous ignition failures?

Without being stood infront of it and watching its difficult to give an accurate suggestion to be fair. From what you are describing it could possibly be a fault on the heating thermister as I have had this once before but cant remember which fault lights it displayed on the front for the life of me. I am pretty sure though that it tells you the fault codes on the drop down panel on the front of the boiler. iirc it was listed as a sensor fault.

HTH

Andy the gas man
March 2006