How can i fix my B&Q WDH-610HA Dehumidifier?

it wont switch on the RED light keeps flashing to indicate that its full. when I turn the switch to off the red light continues to flash, only goes off when I switch of at plug. can anyone help, thanks
george, May 2015


done
Why does the defrost button stay all the time. Only just started doing this recently. Thank you

Linda, January 2021