AC Stays On All Day? Try These Easy Solutions


Your air conditioning system should turn off once it reaches the temperature set on your thermostat. But if your AC stays on all day without rest, you may have a problem with the evaporator coil inside your indoor unit. Your thermostat or its batteries may also be faulty. Any of these problems can cause significant problems with your cooling system and home's energy expenses. You can find out why your AC stays on with the simple solutions below.

Check Your Thermostat

The first thing you can do is check your thermostat's batteries to see if they're low on power. Even the highest quality of batteries can wear down over time. Thermostats rely on special sensors to pick up temperature changes in the home. Low or dead batteries can disrupt communication between your thermostat's sensors and your cooling system. Replace the thermostat's old batteries with a fresh pack to see if it solves your dilemma.

During the battery change, examine the condition of the thermostat's internal components. If the electrical wiring and other components appear rusted or damaged, you may need to install a new thermostat. If the components appear in good shape, and the AC continues to run without shutting down properly, you'll need to check the indoor air handler for problems.

Check Your Indoor Air Handler

An air handler removes heat from the air in your home and transfers cold air back into the home. The device uses several unique parts to operate, including an evaporator coil. Evaporator coils can ice or freeze up if they're dirty or clogged up with debris. The coil will struggle to absorb heat from the air that flows over it.

You can turn off the system completely and allow the coil's surface to thaw. Be sure to place a large bucket and tarp beneath the air handler to catch the water as it drips. The actual thawing time can vary, so check the coil periodically to see if it's clear of ice.

Once the coil is free of ice, return power to your AC. Set a new temperature on your thermostat and wait for the cooling system to reach it. If the system doesn't reach the new temperature and turn off, you'll need to contact a heating and air conditioner contractor for further assistance. You may have problems with your outdoor unit, or you may need to clear out your air ducts.

For more information about your AC and its problems, contact an HVAC company like Reid’s AC & Heat today.


26 July 2017

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