58300000181895 ARA EN A JUNE 2014 Service Manual for Bosch Benchmark Series Built-in Wall Ovens
Page 24 of 45
Copyright by BSH Home Appliances Corporation 1901 Main St ▪ Suite 600 ▪ Irvine, CA 92614 800 944-2904
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Figure 33 HTC and mounting bracket
5. Install the new latch/motor assembly, reconnecting the wires and
engaging the latch correctly with the latch support bracket.
6. Position the latch plate with the curved corners at the bottom, and
reinsert screws.
7. Restore power and test operation.
6.4 Oven High Temperature Cutout (HTC)
The resettable HTC is a normally closed 12VDC thermal switch that is
used to detect over-temperature conditions within the oven. It has a
connector that will interrupt the double line break (DLB) relay coil
voltage supply if the temperature reaches 185°C/365°F. When the
HTC switch opens, it breaks the line to the double line break (DLB)
relays, cutting off power to the elements.
With the latch plate removed, the HTC and the bracket it’s mounted
on are visible to the left of the door latch/motor assembly. The photo
below shows the HTC and bracket, but note that this view is looking
from the rear of the oven towards the front, beneath the top plenum.
6.4.1 Resetting and Replacing the HTC
Always troubleshoot a tripped HTC to determine the underlying cause
of the interruption.
To reset the HTC…
1. Remove power to the oven.
2. Insert a flat blade screwdriver through one of the vent slots, and
depress the red reset button.
3. Restore power and test operation.
To remove the HTC from the front, a right-angled screwdriver will
be needed….
1. Remove power to the oven.
2. Remove the latch plate and remove or slide the latch/motor
assembly aside as described in the Replacing the Latch/Motor
Assembly section.
3. Using a right-angled screwdriver, remove the two screws securing
the HTC to its mounting bracket.
If it is not possible to complete step 3 from the front,
continue with step 4.
If the screws were successfully removed, skip to step 9.
4. Remove the screws securing the right and left side trim pieces to
the cabinetry, and set screws aside.
NOTICE
The HTC switch should only be reset once or twice before being
replaced. The switch weakens each time it trips, so it will become
easier and easier for the switch to trip during high-temperature cycles
(i.e., Self-clean) if it has weakened over time.
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