Worcester heatslave 2 exterior combi

[Inverness]

hi guys I went to breakdown today. The boiler fault code was 219 e9 saftey temperture too high? How do you fix this and would this happen? I reset it and everything is bk to normal bk then it went bk to the fault code.

 

[ShaunCorbs]

Pump working ?

 

[Inverness]

I know the previous plumber charge the expansion vessel as it had been activated. Any other suggestions please

 

[ShaunCorbs]

Dirty system
Temp sensor on its way out
Diverter not moving fully to heating etc

Heat can't get away so start one end and start checking things off

 

[Inverness]

Cheers for that.