Do not manually set back a heat pump's thermostat at night. Without a thermostat specifically designed for heat pump set-back, the electric resistance backup heat will engage when the thermostat is raised in the morning, resulting in much higher energy consumption.
Continuous indoor fan operation can degrade heat pump performance unless a high-efficiency, variable-speed fan motor is used. Operate the system on the "auto" fan setting on the thermostat.
Clean or change filters once a month or as needed, and maintain the system according to manufacturer's instructions. Filter and coil maintenance have a dramatic impact on system performance and service life. Dirty filters, coils, and fans reduce airflow through the system. Reduced airflow decreases system performance and can lead to compressor damage if it continues for an extended period.
Clean and lubricate the fan motor annually to ensure the required airflow is provided for proper operation. The fan speed should be checked at the same time. Incorrect pulley settings, loose fan belts, or incorrect motor speeds can all contribute to poor performance.
Outdoor units should be protected from high winds. High winds may reduce efficiency by causing defrost problems. However, outdoor units should not be placed in restricted areas that will result in recirculation of air over the coil.
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