Select Settings:

Use the arrow buttons to select Service menu:

Select OK:

Use the arrow buttons to select Heater test:

Select OK:

The Heater test 1/2 display opens:

Use the Up arrow button to enable post-heating.

Make sure that the post-heating is working. Operation can be ensured either by measuring the output or by observing the temperature of the defrosting resistor.

Use the Down arrow button to disable post-heating.

Select Right arrow.

The Heater test 2/2 display opens:

Use the Up arrow button to turn on the additional heating resistor.

Ensure that the additional heating resistor is working. This can be done either by measuring the output or by observing the temperature of the additional heating resistor.

Use the Down arrow button to turn off the additional heating resistor.

Select Back: