What does error P1 mean on my EcoSpring ES300+ Water Heater?
- ZzcoxSep 9, 2025
If your EcoSpring Water Heater displays error code P1, it could be due to a system blockage, air or water or more refrigerant in the system (after repair), or a water temperature sensor malfunction. In this case, you should contact a qualified person to service the unit.

