Service Manual for Bosch Built-in Wall Ovens
CODE DESCRIPTION CAUSE/ACTION
E000 Wrong module combination Control module and user
interface are mismatched. Set
Option Code properly.
E003 Electronics too hot User interface exceeds
185°F/85°C
E005 Communication error Loss of communication
between user interface and
control module at start-up.
Check for ~4.9Vdc on middle
pin of communication
harness. Check connections
of all communication lines
and control module inputs.
E009 ROM check error in user interface User interface not getting all
information from control
module at start-up. Check for
loss of communication or
disconnected wire
somewhere in unit
E010 Data memory error in user interface
E011 Continuous pushing of single key Check user interface
assembly. Inspect touch
PCB.
E012 Defective User Interface PCB temp.
sensor
E014 ON/OFF key does not work
E032 Continuous pushing of keys 10 seconds of multiple keys
being pressed.
E101/E201 Cvt 1/Cvt 2 Temp. sensor open Refer to Diagram 2/4
E104/E204 Cvt 1/Cvt 2/Temp. sensor shorted Refer to Diagram 2/4
E106/E206 Cvt 1/Cvt 2 Door latch does not lock Refer to Diagram 2/4
E107/E207 Cvt 1/Cvt 2 Door latch does not
unlock
Refer to Diagram 2/4
E115/E215 Cvt 1/Cvt 2 Temp. in unlocked cavity
too high
E116 Cvt 1/Cvt 2 Probe error Standard probe module is
part of the control module.
Refer to Diagram 1.
CODE DESCRIPTION CAUSE/ACTION
E118/E218 Cvt 1/Cvt 2 Cooling fan supervision
error
Cooling fan speed is too low
or too high. Refer to Diagram
2/4. Ensure wire harness not
touching motor or pinched.
Confirm plenum not touching
fan end cap. Check Hall
Effect Sensor connection.
E122 Cvt 1/ Probe sensor temp. too high
or shorted.
Check probe receptacle and
harness.
E123 Cvt 1/ Probe sensor temp. too low
E124/E224 Cvt 1/Cvt 2 Door switch error Door switch is in undefined
state. Refer to Diagram 2/4.
E126/E226 Cvt 1/Cvt 2 Door latch error Door latch is in an undefined
state. Refer to Diagram 2/4.
E303 Electronics too hot Control module exceeds
212°F/100°C.
E309 ROM Check error in control module
E310 Data memory error in control module
E312 Defective control module PCB temp.
sensor
Table 7 Error codes
5.2 Service Mode / Setting Option Code
When both the user interface board and control module (relay board)
are replaced, the oven will display E000 (Wrong Module Combination)
fault code at start-up. To resolve, place the unit in Service Mode and
manually set the Option Code.
5.2.1 HBL3/HBN3
To enter service mode…
1. Press and hold TEMP.
2. Press and hold COOK TIME.
3. Rotate the Cooking Mode dial out of the OFF position.
4. Release the two buttons.
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