Gas heater does not ignite
What you see
Opening the hot tap does not start the heater or ignition fails to continue.
Likely causes
Water-flow issues, battery supply on battery-powered models, ignition faults or safety-sensor activation.
Safe to try
Only if there is no gas smell, check water flow and the manual's battery instructions. Avoid repeated ignition attempts or opening the casing.
Technician
A qualified technician checks supply, ignition, safety systems and ventilation.

