“Flame will not stay lit” on a cooktop / hob does not identify one failed part by itself. Common paths include temporary program/control state, sensor or user-interface input, cable, connector or communication path; the exact model, any error code and measured values determine diagnosis.
Most likely causes
- temporary program/control state
- sensor or user-interface input
- cable, connector or communication path
- control-board/software feedback
Safe checks you can do
- Check only user-accessible items such as the socket, valves, door and external hoses.
- Note any displayed code and the stage of the cycle when the problem begins.
- Photograph the model/product label and do not dismantle the appliance.
For gas hobs, stop use for gas smell or abnormal flame; close the gas valve if safe and ventilate. For electric/induction hobs, isolate power for sparking, burning smell or breaker trips and avoid hot surfaces.
What does a technician check?
- stored error history and live sensor values where supported
- power supply, wiring/connectors and related actuator measurements
- functional testing of the relevant mechanical/hydraulic/air circuit
What to send with a service request
Share the brand, exact model/product code, any error code, when the issue started, the operating stage and a short photo/video when useful.
Frequently asked questions
Is a reset enough when the cooktop / hob is flame will not stay lit?＋
A reset may clear a temporary control state, but a recurring symptom needs diagnosis rather than repeated resets.
Does this symptom always require a new part?＋
No. Settings, blockages, external connections and operating conditions can produce similar symptoms without a failed part.