********* Disclaimer **********
Any installation and or wiring advice given in this is guidance only. Ultimately the responsibility for the correct and safe installation lies with the installer. If a domestic installation, Part P of the building regulations must be complied with, usually by ensuring that the wiring complies with IEEE wiring regulations.
********* Disclaimer **********
Lets check the wiring
Remove cable circled in red.
Is the heating still on? (Put the wire back after completing this test)