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Error code reference
Ariston Oven Error Code ER99
Invalid error code received from power supply board or error code not applicable to this appliance.
SourceAriston Experience Touch FZ100 - Service Manual (2004)p. 18
Diagnostic procedure
The full ER99 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
Replace the power supply board.
SourceAriston Experience Touch FZ100 - Service Manual (2004)p. 18
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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