Error Code E09 on your Rheem Heat Pump (551270 in R134a) is not a fault but indicates the system’s electric heating unit is operating for freeze prevention. This is a normal protective operation when ambient temperatures become very low.
No immediate action is necessary since Error E09 is a standard system function protecting your heat pump from freezing. However, if this error persists in mild weather conditions, it may indicate an underlying issue requiring investigation. If concerned or experiencing unusual system behavior, contact Hilton Plumbing for a professional assessment.
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