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What should I do if my Ruud Ultra Plug-in Heat Pump with HydroBoost (120V Shared Circuit) shows Alarm Code A130?
FREEZE WARNING: For your safety, be cautious of the freezing conditions.
Possible Cause: The ambient temperature is below freezing. What To Do: Select the appropriate mode to enable the heater. Essentially, turn the unit on.
This answer is applicable for the following model: Ruud Ultra Plug-in Heat Pump with HydroBoost (120V Shared Circuit).