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Why Is Your Heat Pump Freezing Up?

frozen AC compressor

If you see frost on the outdoor coils of your heat pump, don’t panic — it’s simply a part of the system’s normal operation. When your unit detects a buildup of ice, it shifts temporarily into a cooling mode to reverse the refrigerant flow. Hot refrigerant moves through the coils and melts the ice to defrost the system. Once the cycle is complete, the unit shifts back to heating mode.  To learn more about the matter, keep reading — a reputable HVAC contractor will guide you through.

What Causes Your Heat Pump to Freeze Up?

If you have issues with your heat pump constantly freezing up, it’s best to call a professional to properly address the underlying issue. If left untreated, your unit will likely sustain more damage, leading to premature system failure. Some of the problems your technician can identify and resolve include:

  • Low refrigerant levels
  • Faulty defrost thermostats or sensors
  • Malfunctioning outdoor fan motors
  • A sticking reversing valve

Maintenance Tips

If you find your heat pump completely covered with frost or ice, immediately shut the system off and call your local technician for help. Before you even reach this situation, consider following these maintenance tips to fend off simple issues as well as improve your indoor air quality.

  • Check the air filter to make sure it’s not clogged or damaged. Replace dirty filters at least once every three months.
  • Check indoor air vents and registers to make sure they’re not blocked by furniture or other items.
  • Clear away any buildup of leaves or dirt that can interfere with the airflow of your unit.

Anthony's Cooling-Heating-Electrical, Inc. is a premier source of heating, air conditioning, and electrical repairs in Florida. We’re committed to providing industry-leading products and services to create an energy-efficient, cozy living space for our customers. Call us today at (941) 347-0779 or fill out our contact form to set up an appointment.