Gas cooktop display shows E1 and gas valves do not open on electronic models

Safety first: Turn off the gas supply at the shutoff valve. Disconnect electrical power before accessing internal components. Gas work should be performed only by licensed personnel where required by law.

User actions:

• Do not attempt to bypass safety devices or force valves open.
• Contact a qualified Liebherr service technician or gas fitter.

Technician actions:

• Verify correct gas supply pressure at the inlet using a manometer.
• Check the gas valve solenoid coils for correct resistance and continuity.
• Inspect connectors between the control board and gas valves for secure fit.
• Test the gas safety control board outputs when a burner is commanded on; if no signal is present and inputs are correct, replace the board.
• Replace any defective gas valve assemblies following Liebherr and local gas code procedures, then perform a leak test.