John Wood electronic gas water heater displays E019 and the burner shuts off; condensate present around base on condensing model

Safety: Turn off power before servicing condensate components. Condensate is mildly acidic; wear gloves and eye protection.

• 1. Inspect drain line: Follow the condensate hose from the heater to the drain. Straighten kinks and ensure a continuous downward slope.
• 2. Clean trap: Remove the condensate trap, flush it with clean water, and remove any sludge or debris.
• 3. Check for freezing: In cold climates, ensure the drain line is protected from freezing temperatures.
• 4. Float switch: If your model has a condensate overflow float switch, test it for proper operation and replace if stuck or failed.
• 5. Reset and test: After clearing the drain, reset the control and verify that E019 does not return and no condensate leaks are present.