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auxillary heat

  1. Heat Pump outside fan on/off every 5 seconds

    I have a Carrier Heat Pump. When in heating mode, the thermostat clicks to turn the heat on, and the blower starts blowing. However, the outside unit starts spinning for about 5 seconds then clicks off for about 15 seconds. It repeats this cycle over and over. I hear a slight hissing noise or...