Tankless units behave unlike tank heaters, and several of their normal traits get reported as faults: they need a minimum flow to fire, and short back-to-back draws can produce a cold slug at the tap. Knowing that avoids a pointless service call.
Real faults on these are usually scale in the heat exchanger or an ignition problem, and both need a licensed gas trade with the right flushing kit and test instruments. Owners can clean the inlet filter per the manual and keep the vent terminal clear; nothing inside the cabinet is owner-serviceable.
Key Features
- Indoor direct-vent gas tankless water heater documented in GE installation instructions
- On-demand heating with no storage tank
- Dedicated sealed direct-vent system
- Electronic control with fault codes shown on the unit
Most Common Issues on This Model
Cold-water sandwich effect between short draws
Scale build-up in the heat exchanger reducing flow and triggering codes
Ignition faults after a gas or power interruption
Minimum-flow problems, where a trickling tap will not fire the burner