58300000202181 ARA EN B November 2018 Service Manual for Bosch 500 Series Built-in Wall Ovens
Page 17 of 41
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3. Hold the latch hook and slide the latch assembly back and a
little to the left to disengage it from the small support bracket
that sits directly behind it, then pull the latch forward.
4. Disconnect the wires.
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.
6.3 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. Figure 19
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.
6.3.1 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.
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