While you wait for answers, we may have found some information which could help you.
Success
Message
water sensor?
charging system up?
pressure switch?
water goes cold during shower?
gas neoon flashing?
no hot water and pressure valve is on red and water is leakiing outside?
burner going of after 2 or 3 minutes and on?
max of 50 degrees hot water?
were do I get a diagram and information on airpressureswitch 105he?
what does F14 mean and F5?
Fan light flashing?
no domestic hot water?