Error code reference

Bosch Oven Error Code E044

Touch control module (TCM) option code error

Touch control module (TCM) option code error — TCM board or connections to TCM are bad; during start-up the control module is unable to set TCM option code; reset is required to clear error.

First step from the service manual

Enter Service mode to set correct option code. Check connection to control module. Check connection to TCM. If unable to set option code and connections are good, replace front panel assembly.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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Step-by-step tests with expected resistance, voltage, and continuity values
Wiring diagram references and connector pinouts from the OEM service manual
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E044 on my Bosch Oven

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Touch control module (TCM) option code error —

From Service Manual 974842, p.14:

1.Enter Service mode to set correct option code. Check connection to control module. Check connection to TCM. If unable to set option code and connections are good, replace front panel assembly.

2.Measure control board supply voltage at the test points. Expected: 12 VDC and 5 VDC; a drop below 4.75 VDC on the logic rail points to a failed onboard regulator.

3.Inspect all connectors on the main control for corrosion, thermal stress, or backed-out pins. Reseat each connector with the power disconnected.

Part 00705047

Control module

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First step from the service manual

Get the full diagnostic procedure for E044.

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