Baxi Combustion Control Unit and PSU Part number 7784288 My 8 year old Baxi EcoBlue Advance Heat 16 Boiler had 3 flashing red lights and the fault was diagnosed by a professional Boiler & Heating Engineer as needing this unit replacing. Unfortunately a new Baxi unit was fitted however the fault wasn’t cured. A separate heating valve was the issue and I was charged for both. There is a very good chance there is nothing wrong with this however I’m listing it as spares or repairs.
