Start with the simplest checks
Confirm rack position, cookware placement, preheat time, and that vents are not blocked.
- Record any error code before switching power off.
- Confirm the appliance is in the expected mode and the controls are not locked or delayed.
- Check visible, user-accessible connections and maintenance items described in the owner manual.
- Use the model number to find the exact manual if the behaviour is not obvious.
Stop and arrange service if there is smoke, arcing, a burning smell, gas odour, severe overheating, active leaking near electrical parts, or a tripped breaker that immediately trips again.
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What the exact model number changes
Appliances that look similar can use different control boards, sensors, pumps, heaters, and service procedures. Model-specific documentation is the best way to distinguish a simple maintenance issue from a component fault.