Sometimes you may notice your heat pump running differently than usual, especially when the temperatures start to drop. Fortunately, this usually isn’t a cause for concern because it’s probably just initiating the defrost cycle. M & M Heating & Air Conditioning Service Co., your trusted heating repair and AC replacement company, shares everything you need to know about this process here.
About the Defrost Cycle
When the heat pump is in heating mode, it pulls heat from the outside air and transfers it inside to warm it. However, the moisture in the outdoor air freezes on the outdoor unit’s heat exchanger as the fan blows the air across it. Frost starts to form on the outdoor coil, which then causes the equipment to work inefficiently. The heat pump triggers the defrost mode to remove this buildup.
How the Defrost Cycle Works
Your heat pump switches from heating to cooling mode to activate the defrost cycle. You may hear the reversing valve when this happens. You might also notice the indoor unit is running but the outdoor fan is shut off. A single defrost cycle usually lasts from five to 15 minutes and shouldn’t affect your home’s indoor temperature.
There could be an issue with your heat pump if it undergoes the defrost cycle too frequently or doesn’t deliver enough heat even after the cycle has ended. Get in touch with an HVAC technician who specializes in central heat and air conditioning systems to diagnose the problem. The equipment could be faulty or require maintenance.
M & M Heating & Air Conditioning Service Co. offers an annual maintenance plan for your HVAC equipment. It’s called the Energy Savings Maintenance Agreement (ESMA), and signing up for one will help extend the life of your heating and cooling system, maximize its energy efficiency and give you peace of mind knowing that it will keep you comfortable year-round.