Vaillant 828E

[jimmy walton]

This morning the boiler was not working. The fault code was F64... I turned off the supply and then switched it back on and the boiler worked ok..
After my shower I pressed + and - together and the fault code showed SF.H I can find no reference to this code........Any ideas anyone???


thanks jim walton

 

[gas4you]

If it keeps working then ignore the F64 for now, Could just have been an eroneous reading

F64 is a electronic fault. Check the flow & backflow ntc's first or replace them.

S is a status code rather than a fault code.

+ & - together just puts the boiler in maximum output for setting the co2 levels up during commissioning.

 

[jimmy walton]

I checked the ntc's and the flow one was reading very low resistance to earth. I have just changed it and the boiler is running.. I will keep you updated..

jim walton

 

[jimmy walton]

2 days and the boiler is working fine! 15 quid for a new sensor.Not often boiler problems have such happy endings!