Display shows generic 'Err' when trying to set temperature or function on Fagor range.

Safety first: No internal access is required for basic checks. If opening panels, disconnect power first.

• Clear settings: Press Cancel/Stop to clear any active program. Wait a few seconds and re‑enter the desired function and temperature following the user manual.
• Check keypad: Ensure no buttons are physically stuck or jammed.
• Power reset: Turn off the breaker for 5–10 minutes to reset the control logic, then test again.
• If 'Err' persists: The electronic oven control or keypad may be faulty and require replacement.