Fault codes / RV water heater / GAS AND SPARK, STILL LOCKS OUT

RV water heater: Gas and spark, still locks out

What it means: Flame not being proven.

What to check

Gas pressure, low voltage, poor ground, electrodes out of flame or sparking to the burner screw, partial burner/orifice blockage, air shutter about 1/4 open, flame spreader square to the tube.

Learn the system

• Tank water heaters
• Tankless water heaters
• Water heater gas side

Practice it on a service call

• No hot water on electric
• Water heater lights, then goes out
• Water heater lights then faults

Guided diagnosis

• Water Heater

Other RV water heater codes

• RV water heater: Spark, no gas Gas not getting to the burner
• RV water heater: Gas, no spark Ignition side

Full field guide: Suburban and Atwood tank water heater

Codes come from the maker manuals and public service sheets. Your model's own chart always wins, and LP and 120 volt work belongs to a qualified technician.