good afternoon gracelvica .... as your husband has a notion ,,,, you can do it ,,, with the fridge unplugged for personal safety ,,,, 1st check the bimetal if it is activated ,,,,,,, 2nd check the fan if it operates ,,,,,,,,, 3rd verify with a cable with connection to test the resistance if it heats ,,,, 4th verify the timer with the fingertips is given to the knob and If it is very hard replace it ....... and once you have finished the review, take out the water that is in the tray, which is behind the fridge ...... Rate the response