Why is my dimpled xln storage heater not working?

No power being supplied
Defective controls
Open circuit heating element
Thermal fuse (if it has one) activated

Nobody here can make a diagnosis for you.

Good Luck...
February 2016

Charge thermostat failed
Overtemperature protection activiated
Mains supply failed
Fuse blown/breaker open
Controls not set properly
ID-10-T error
Element blown (although many of these heaters have moer than one element)
Wiring fault
Low rate electricity supply not switching over

All these are completely basic checks you could make but the fact that you didn't think to eliminate at least some of these suggests you are probably not competent to work on electrical items. Please consider getting a competent techie in before you kill either yourself or someone important.

XXX
February 2016