Air Movement In The Oven During Convection Bake And Convection Roast - Electrolux E36DF76EPS Service Manual

remove rack switch mounted on the rear of the oven,
and the cooling blower mounted between the burner
box and the oven at the rear of the range.
When electrical power is applied to the range line 1 is
connected directly to the electronic oven control board
and line 2 is connected to the electronic oven control
board through the oven hi temp limit. The high temp
limit is a manual resettable bimetal fuse that opens at
250°F that protect the range in case the oven overheats.
The electronic oven control, controls the operation of
the oven. It receives input from the thermostat, selec-
tor, remove rack sw. and the oven sensor. The thermo-
stat and selector are potentiometers. The control board
applies an electrical potential across pins(1) and (3).
The control then reads the voltage drops across pins
(1) and (3) and pins (2) and (3). By reading the total
voltage drop across the potentiometers and the voltage
dropped from the tap, and comparing the two, the con-
trol makes up for any variances in the control's resis-
tance.
As the thermostat knob is turned the output from pin (2)
changes telling the control what temperature is set. The
selector operates in the same manner except there are
indents for each function.
The oven temperature sensor operates by changing
resistance also, the resistance of the sensor increases
as the temperature in the oven rises. The control board
reads the resistance of the oven sensor and compares
it with the input from the thermostat. This allows the
control board to cycle the elements in the oven to main-
tain the setting of the thermostat.
The control board supplies 240 VAC to the bake ele-
ment, broil element, convection element and convec-
tion fan motor. 120 VAC to the lock motor and cooling
blower. The control board also supplies an output to
the interface board telling it which LED to light up.
Air movement in the oven during Convec-
tion Bake and Convection Roast.
When the oven is set for convection bake, the convec-
tion fan blade forces air across the convection element,
which heats the air. The heated air is forced through
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