Hi guys have a baxi main about 10 15yrs old. Have an error E1 33. Boiler attempts to power up when hit reset. Sometimes fire up after few attempts then goes to 71 temp for hot water and starts losing temp sounds like burner going off and on after temp goes down E1 33 appears. Had engineer out changed gas valve electrodes and flow valve. Done condensing pipe check. £200 in parts and labour on top gave up said he cant figure out what issue could be! Do I purchase another boiler or is there a repair to this? As financially at this point be a bit of struggle for new 1. TA