Auto Defrost Freezer Not Working

A quick fix if the fridge freezer is working ok but the auto defrost is not is to connect it to the mains via a 24hr timer.

Auto defrost freezer not working.

All you have to do is set it to come on for 15mins then of for 30 mins. The defrost timer is such that either the compressor or the defrost heater is on but not both at the same time. If the defrost timer is not advancing replace it. A defrost thermostat opens the heater circuit when the evaporator temperature rises above a preset temperature 40 f 5 c or more thereby preventing excessive heating of the freezer compartment.

If any of them fails to function the defrost system will not function. Move on to the next step if this does not resolve the defrosting issue. 5 check if the defrost timer defrost heater and the thermostat are working correctly. When the coils are covered by too much frost and ice airflow is restricted and the freezer won t efficiently cool food.

Replace the defrost sensor if it shows no continuity at around 0 degrees f. A manual defrost freezer does not contain any automatic heating elements to prevent the build up of frost or ice. You can use volt ohm meter to check the defrost sensor for continuity. If the defrost heater assembly is defective the defrost system will not work and frost will continue to accumulate.

Do this with all the sections of the timer till you reach the beginning of the cycle again. If the defrost sensor trips because it s not working correctly frost builds up on the evaporator fins eventually making the refrigerator and freezer not cool well.