Pyrolytic self-cleaning cycle does not start or aborts early with E17 displayed.

Safety first: Ensure the oven is cool and disconnected from mains before inspection.

Checks:

• Verify that the door lock engages fully when starting a pyrolytic cycle. If not, troubleshoot the door lock assembly (see E08/E09).
• Check the main temperature sensor (NTC) and any dedicated pyrolytic sensor for correct resistance at room temperature.
• Inspect the high-temperature safety thermostat specific to pyrolytic mode for continuity; replace if open.
• Confirm that all heating elements (upper, lower, circular) are operational, as pyrolysis often uses multiple elements to reach high temperature.
• If sensors and elements are good, the control board may be mismanaging the pyrolytic cycle and require replacement.

Note: Pyrolytic cycles reach very high temperatures; never bypass safety thermostats or door locks to force operation.