Bake Element; Replacing The Bake Element; Temperature Sensor; Control Module (Relay Board) And Daughter Board - Bosch 500 Series Service Manual

58300000202181 ARA EN B

6.8 Bake Element

The 240V 2400W bake element is concealed in the base of the oven.
Access to the rear of the unit is necessary when replacing the
element.
Refer to the Element Strip Diagram section to test the bake element at
the control module. A Bake Element Relay Test is also available in
Service mode. See the Service Mode section for additional
information.
If the wires are disconnected from the element terminals, an
ohmmeter can be used to check for resistance of ~24 ohms.

6.8.1 Replacing the Bake Element

1. Remove the screws securing the right and left side trim pieces
to the cabinetry.
2. Carefully slide the oven out of the cutout to gain access to the
bake element from the rear of the unit.
3. Disconnect the wires from the element terminals.
4. Remove the screws securing the bake element access panel.
5. Bend the access panel downward to expose the element.
6. Holding the terminal plate, pull the bake element outward,
leaving the insulation in place; a putty knife or similar tool may
be useful.
Figure 30 Removing the bake element
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Novemb er 2018

6.9 Temperature Sensor

The PT1000 temperature sensor is in the upper left corner of the
cavity, with two screws securing it. An ohmmeter can be used to
check the resistance of the sensor. Normal ranges (based on cavity
temperature) are shown in Table 6.
Table 6 Normal resistance readings for temperature sensor

6.10 Control Module (Relay Board) and Daughter Board

The control module (and daughter board on double ovens) control the
elements, fans, door locks, lights, etc., regulate temperatures, and
monitor safety functions. The module(s) are also responsible for
communication with other modules, analyzing sensor data, regulating
line voltage, and managing user interface activities.
The control module and daughter board are accessible from the top of
the unit. Proceed to the Replacing the Control Module or Daughter
Board section if an HBL57M52UCC is not being serviced.
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Service Manual for Bosch 500 Series Built-in Wall Ovens
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