Bosch FAP-OC 500Series Service Manual - Page 23

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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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