Thermistor; Magnetron Temperature Fuse; Top Heater Thermal Cut-Out; Side Heater Thermal Cut-Out - Electrolux ICON E30SO75ESS Technical & Service Manual

Operation

THERMISTOR

The thermistor is a negative temperature coefficient type.
The temperature in the oven cavity is detected through
the resistance of the thermistor, and then the control unit
causes the heater relay to operate, thus the current to the
heating elements is turned ON/OFF. If the convection
cooking or some cooking modes which use the top / side
heating elements is started and the oven temperature
does not rise above 100°F (37.8°C), the control unit will
stop the oven after 10 minutes. In this case, the
thermistor may be opened.

MAGNETRON TEMPERATURE FUSE

The temperature fuse located on the waveguide flange is
designed to prevent damage to the magnetron if an over
heated condition develops in the magnetron due to
cooling fan failure, obstructed air guide, dirty or blocked
air intake, etc.
Under normal operation, the temperature fuse remains
closed. However, when abnormally high temperatures
are reached within the magnetron, the temperature fuse
will remain open at 302°F (150°C) causing the oven to
shut down.

TOP HEATER THERMAL CUT-OUT

The thermal cut-out located on the thermal cover upper is
designed to prevent damage to the top heating element
unit if an overheated condition develops in the top
heating element unit due to convection fan failure,
thermistor failure, obstructed air ducts, dirty or blocked air
intake, etc.
Under normal operation, the thermal cut-out remains
closed. However, when abnormally high temperature are
reached within the top heating element unit, the thermal
cut-out will open at 338°F (170°C) causing the oven to
shut down. When the thermal cut-out has cooled, the
thermal cut-out closes at 311°F (155°C).

SIDE HEATER THERMAL CUT-OUT

The thermal cut-out located on the thermal cover left is
designed to prevent damage to the side heating element
unit if an over heated condition develops in the top
heating element unit due to convection fan failure,
thermistor failure, obstructed air ducts, dirty or blocked air
intake, etc.
Under normal operation, the thermal cut-out remains
closed. However, when abnormally high temperature are
reached within the side heating element unit, the thermal
cut-out will open at 302°F (150°C) causing the oven to
shut down. When the thermal cut-out has cooled, the
thermal cut-out closes at 266°F (130°C).

TOP HEATING ELEMENT

The top heating element is located at the top of the oven
cavity. It is intended to heat air driven by the convection
fan. The heated air is kept in the oven and force
circulated and reheated by the top heating element.

SIDE HEATING ELEMENT

The side heating element is located at the left side of the
oven cavity. It is intended to heat air driven by the
convection fan. The heated air is kept in the oven and
force circulated and reheated by the top heating element.

TURNTABLE MOTOR

The turntable motor rotates the turntable located in
the bottom of the oven cavity, so that the food on the
turntable is cooked evenly during cooking. The turntable
may turn in either direction.

FAN MOTOR (MAGNETRON SIDE)

The fan motor drives a blade which draws external cool
air. This cool air is directed through the air vents
surrounding the magnetron and cools the magnetron.
This air is channelled through the oven cavity to remove
steam and vapors given off from the heating foods. It is
then exhausted through the exhausting air vents at the
oven cavity.
2-8