protherm 80e combi

[micktemps10]

f3 comes up on the lcd display, haven't got a manual, so don't what it means, can anybody give me advice please

cheers mick

 

[mickyg]

most likely to be a blocked plate heat exchanger.

 

[Agile]

And what stimulates that fault code?

Tony

 

[steve32]

its in the mi's f3 check heat exchanger blockage

check main and dhw heat exchangers

 

[Agile]

In a fault finding chart perhaps, but do you know what actually is being responded to?

Primary overtemp?

Tony

 

[mickyg]

rapid rise on primary ntc.