Vaillant EcoTec Pro F28 Fault Code Diagnosis 

Thank you.. That was so helpful, no rambling about unnecessary information 👍🏾

Yeah lots of good points made .. thanks for your efforts 👍😊😊

Quality vid bro. Very helpful

Great absolutely legendary bro . Thanks

Also check water pressure in heating system for F28 fault code. Increasing the pressure fixed the issue in my case.

I usually find it's the spark generator or the electrodes unless the boilers are old. Then wiring or occasionally gas valve has gone bad internally. Frozen condi or blocked flue in rare cases.

My vaillant boiler is locked out checked S codes and the boiler trys to fire up but fails with S97 followed by S11 good vid btw :)

Hi mate great video, what would you point to with an f28 with a humming sound intermittently?

One thing to look out for I had an intermittent f28, it was a blocked drain. Only locked out when the bath was let out and caused the lock out. Questioning the customer properly was how I figured it out

How do I get to the login page it keeps taking me to the sales page