When you switch heating on burner runs for 6 seconds then goes out for 15 seconds and shows F2. Then F2 goes out and burner comes back on for 6 seconds and the cycle keeps repeating. The rads eventually get hot but should F 2 be showing?
Suspect hot taps are not delivering satisfactorily.

Charlie, October 2018

http://www.morcoproducts.co.uk/resources/L2_Fault_Code.pdf

http://www.morcoproducts.co.uk/troubleshooting.html

kjkg, November 2018