3M 9222 PG II Heater Repair Kit
The heater kit requires you to follow "Heat Shield Disassembly" then make sure you replace all 4 heaters and reconnect wires in their proper place. Make sure that the heaters are bottomed out on the heat block. Be very careful not to crack the ceramic. For detailed instructions on how to change your PG II Heater please see your 3M Scotch-Weld PG II Owner's Manual.