dimplex duoheater 500i

Hello, Our storage heaters stopped working Dimplex Duo300i and 500i we didn't use them for a while. Called few local electricians in local area and everyone is busy for a week nobody will come. One person told me to try "reseting cut out switch" inside the heater but I can't find it. Below...

IMG_20201204_204917 by Clarkin1 posted 4 Dec 2020 at 9:39 PMIMG_20201204_204937 by Clarkin1 posted 4 Dec 2020 at 9:39 PMIMG_20201204_205747 by Clarkin1 posted 4 Dec 2020 at 9:39 PMIMG_20201204_205807 by Clarkin1 posted 4 Dec 2020 at 9:39 PMIMG_20201204_205814 by Clarkin1 posted 4 Dec 2020 at...

Hi i am having some issues with this heater its a 500i Moved into house last year with already installed and put heater on it made a loud clicking noise and red led's flash. i have changed the thermostats but the leds still flash also the off peak socket gets really hot - i have checked...