Convection Fan, Ring Element And Motor; Replacing The Convection Fan Blade; Replacing The Convection Element - Bosch 500 Series Service Manual

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2. Unscrew the appliance bulb by turning it counter-clockwise.
3. Insert the new bulb.
4. Replace the glass cover.
5. Restore power to the unit and test the operation of the light.

6.6 Convection Fan, Ring Element and Motor

All 500 series models except the HBL5351UC and HBL5551UC have
a Euro-convection cavity with a fan and ring element on the rear
cavity wall. In double ovens, the upper cavity has the convection
feature.
Depending on the cooking mode selected, the fan may be used, with
or without the ring element, to circulate heat evenly throughout the
cavity. The 240V 2000W ring element, however, will never run without
the fan.
The fan blade is easily accessed on the rear wall of the oven cavity
behind the convection baffle. It is likely that the wires to the ring
element terminals are a little too short to enable element replacement
from inside the cavity, so rear access to the oven may be needed.
Replacing the convection fan motor will also require access to the rear
of the unit.
A Convection Element Relay Test and a Convection Fan Relay Test
are available in Service mode. See the Service Mode section for
additional information. Refer to the Element Strip Diagram section to
test the convection element at the control module.
If the wires are disconnected from the element terminals, an
ohmmeter can be used to check for resistance of ~29 ohms.

6.6.1 Replacing the Convection Fan Blade

1. Remove power to the oven.
2. Remove the screws securing the convection baffle to the rear
wall of the oven cavity.
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Novemb er 2018
6.6.2
1901 Main St ▪ Suite 600 ▪ Irvine, CA 92614
Service Manual for Bosch 500 Series Built-in Wall Ovens
3. While holding the fan blade, loosen the nut by turning it
clockwise; set the nut and washer aside.
4. Remove the fan blade from the shaft of the motor, noting that
there is a second washer behind the fan blade.
5. Install the new blade.
6. Reassemble the convection fan and replace the baffle.
7. Restore power and test operation.

Replacing the Convection Element

It is likely that the wires are too short to service the convection
element from the front of the oven. However, to attempt service
from the front...
1. Remove power to the oven.
2. Remove the screws securing the convection baffle to the rear
wall of the oven cavity.
Figure 28 Screws securing the ring element to the rear wall of the cavity
3. Remove the screws securing the ring element to the cavity
wall, then carefully pull the element forward.
4. Disconnect the wires from the ring element terminals, being
careful not to drop the wires behind the oven.
 If the wires are too short to disconnect from the front,
continue with step 5.
 If the wires were successfully disconnected, skip to step 8.
5. Remove the screws securing the right and left side trim pieces
to the cabinetry.
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