What actions should I undertake if my Ruud Ultra Plug-in Heat Pump with HydroBoost (120V Shared Circuit) indicates Alarm Code A200?

CAUTION: For your safety, always disconnect power before working with electrical components to avoid potential hazards.

Possible Cause: The ECO (Energy Cut Off) has tripped, resulting in the heater being disabled. What To Do:

1. Disconnect the power supply to the unit.
2. Examine the elements from screw to ground for any irregularities.
3. Measure the resistance of the thermistors.
4. If the issue isn’t associated with either the elements or the thermistor, it’s advisable to replace the board.

This answer is applicable for the following model: Ruud Ultra Plug-in Heat Pump with HydroBoost (120V Shared Circuit).