Long-term HVAC service technician logs and homeowner repair reports highlight several recurring mechanical issues affecting Carrier heat pumps over extended lifespans. These include failing defrost control boards preventing proper ice removal during freezing winter cycles, outdoor reversing valve solenoid failures sticking the system in heating or cooling mode, capacitor or contactor burnout in the outdoor condensing unit, and frozen indoor coils resulting from restricted airflow or dirty high-efficiency air filters.
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