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

58300000181895 ARA EN A
6.7

Convection Fan, Ring Element and Motor

Regardless of model, all Benchmark series oven cavities include
Euro-convection with a fan and ring element on the rear cavity wall.
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 Ring Element Ring 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 ring 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.
6.7.1

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.
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.
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This material is intended for the sole use of BSH authorized persons and may contain confidential and proprietary information. Any unauthorized review, use, copying, disclosure, or distribution in any format is prohibited.
JUNE 2014
7. Restore power and test operation.
6.7.2
It is likely that the wires are too short to service the convection ring
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 44 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
 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.
6. Carefully slide the oven out of the cutout to gain access to the ring
element terminals from the rear of the unit.
7. Disconnect the wire leads from the terminals.
8. Install the new element and reinstall the baffle.
9. Restore power and test operation.
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Service Manual for Bosch Benchmark Series Built-in Wall Ovens

Replacing the Ring Element

with step 5.
Page 29 of 45
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