If your Vax vacuum is getting very hot and cutting out then it may be because the exhaust filter is blocked and needs to be changed. This will fit the following models of vacuum.
GENUINE Hoover 'T116' Type H-Free 100 Series Vacuum Cleaner Exhaust Filter
Hoover H FREE 100 Vacuum Cleaner Exhaust Filter GENUINE
GENUINE HOOVER U60 RUSH TCR VACUUM CLEANER EXHAUST & HEPA FILTER KIT 35600936
Hoover Curve TCU1410 T109 Vacuum Hepa Exhaust Filter GENUINE
GENUINE Hoover Vacuum HEPA Exhaust Filter HF122RPT001 HF122UDD001