TEVO Infrared Instant Heater Won't Turn Off Repair.

Exercising our right to repair with this instant infrared heater model SNBHTR that doesn't turn off.
CAUTION do not work on mains operated device unless you understand the risks and how to do so safely.
Tools I use -
Soldering
Quick 861DW hot air station
GVM H3 soldering station
Multimeter
RMM760D - can be found under many name badges
Microscope
Luzky Zoom 3.5 - 90x simul-focus single boom stand trinocular stereo microscope
Camera - Lucky Zoom HD 14MP
Oscilloscopes
Siglent SDS 1102CML 100MHz 2CH
Philips PM 3305 35MHz 2CH
Function generastor
FY6900 (many brand names)
Thermial imaging camera
FLIR ONE PRO on android
Bench supply
Powertech MP-3086 0-30V 3A
TL866II PLUS universal EEPROM programmer

[@TheDefpom]

@1:00 I would be using a flat blade screwdriver for that, being as it requires more force than the spudger can manage.

[@TheDefpom]

Must have been shorting to the earthed casing, have to wonder if the house it was used in has an electrical issue where the earth leakage isn't working or maybe not even present due to age pre-dating the use of RCD's.

[@JonnyFix]

Yeah likely old house/workshop. I presume new builds must require RCD breakers now? Or maybe only under certain circumstances like commercial builds.

[@campbellmorrison8540]

Good job, it doesn't look very water proof to me

[@JonnyFix]

I doubt these are meant for outdoor use

[@campbellmorrison8540]

@@JonnyFix Oh ok I thought it was one of the units constantly advertised on TV, looks very similar.