Sonic Pad power loss recovery

Sonic pad connected to a Ender 3 s1. Just had a fuse trip and power the house down. Power loss recovery kicked in but it wouldnt reheat the nozzle, just got cold, bed reheats fine. How can I get this working? Any ideas?

For info, I powered off the printer at the switch. Restart it and I get the abnormal interruption message. On the web page I set temps to 185/60. the temps are reached and I click continue print, then the extruder just turns off and loses heat, this causes the print to fail again. Why is the extruder not keeping temp?