Air Flow System - Whirlpool WRX-17TM Service Manual

Basically, the temperature read inside the freezer by the temperature sensor is sent to the electronic control,
which controls the working of the compressor, of the fan motor, and of the heater (each 8 hours of working of
the compressor (or each 4 fours in the adaptive mode, as you will see following this manual).
Variables:
a) The internal lamp is lighted when the door is opened. An electromechanical switch is connected in series
between the lamp and the electronic control.
b) The temperature inside the refrigerator compartment is controlled by an mechanical thermostatic damper,
which controls the air flow from the freezer to the refrigerator compartment, therefore, the changed air from
the refrigerator compartment rises till the temperature sensor located on the freezer. The factor which
defines when will occurs a defrost procedure, is therefore, strongly linked to the quantity of the opening of
doors, besides the quantity of food and external temperatures.

3.2. Air Flow System

The pictures below show us how the forced air, circulates on the product, and returns to the evaporator, when
suffers the cooling process again.
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