Error code reference

Bosch Dishwasher Error Code H

Heating system fault: heater, Hi-Limit, flow switch, NTC, or control module heater relay (Apexx SH_99 full text display).

SourceBosch Dishwasher - Service Training Manualp. 45

Diagnostic procedure

The full H procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Check if spray arms are turning during the customer service program; check NTC resistance values; check pressure switch resistance at approximately 12 ohms.

SourceBosch Dishwasher SHE Series - Service Manual: Error Diagnosis & Troubleshooting

More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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