This cycle most commonly works by temporarily reversing the flow of refrigerant and allowing hot refrigerant to flow through the coils, melting any ice on their exterior. If the defrost cycle is malfunctioning, it may not be able to remove ice and frost on the coils.
Fixing a Frozen Evaporator Coil A coating of ice on the evaporator coils will prevent the coils from working properly. Your technician will generally: Turn off power to the air conditioner to ensure it has stopped operating — for safety reasons.
He will need to open the access door to the evaporator coils and check to see if there is ice on the coils. If the coils are in fact frozen, there are a number of simple remedies your technician can use to get rid of accumulated ice. It is important to note that chipping or hammering at the ice should never be an option, as this could damage the coils.
The technician should ensure defrosted coils are clean and in good condition. Coils can be gently scrubbed with a soft-bristled brush. The fins provide extra surface area for heat transfer.
If the heat transfer fins are bent, they can be straightened with a specialized tool called a fin comb. Such tasks are definitely best left to your HVAC professional. Search Search for:. Local Reviews. Pin It on Pinterest. However, there are other reasons your AC unit may freeze aside from the temperature outside. If your air conditioner has insufficient air flow, a dirty air filter or a refrigerant leak, it can also end up freezing over.
To ensure you cover all of your bases, you should have your air conditioner serviced at least once a year to ensure that it is clean and working properly. To get your AC unit repaired or maintenanced , give us a call today.
If you notice that your evaporator coil has frozen over, contact Jerry Kelly so we can find the source of the problem. It's helpful if you turn off your air conditioner before we arrive at your home so that it can defrost by the time we get there.
After we discover the source of the problem, we'll fix it and advise you on how to avoid it from happening again! If you have any questions about the proper placement of your thermostat, or if you'd like a cooling system serviced or installed in your home, contact Jerry Kelly, your St.
Charles, MO, air conditioning company. We service the St. Louis area, including towns like St. Peters, Town and Country and Weldon Spring. Why does a frozen evaporator coil occur? Why does an air conditioner freeze over? An air conditioner usually freezes over because: Your air filter is clogged. Your evaporator coil is dirty.
You have a refrigerant leak. How do I stop my air conditioner from freezing up? To stop your air conditioner from freezing up , you can: Replace your air filters regularly.
Call Byrd Heating and Air Conditioning for complete details. Limited time offer. Suite , Savannah, GA Why an Evaporator Coil Freezes The first concept to understand while troubleshooting a frozen evaporator coil is that the coil is supposed to be cold but not freezing.
What You Can Do While troubleshooting a frozen evaporator coil can be accomplished in a limited way by a handy homeowner with average DIY skills, most repairs for this problem will require qualified HVAC service. Turn the fan switch to "fan only" to blow warm air over the coils and hasten melting. If ice accumulation on the coil extends beyond the dimensions of the condensate drip pan beneath the air handler, be ready with containers to catch the dripping water and prevent water damage as the ice melts.
Next, check the air filter. Low system airflow is one cause of coil icing, and a clogged filter definitely reduces airflow. When system airflow drops below specs, refrigerant circulating through the coil can't extract sufficient heat energy. Refrigerant temperature plunges into the range below 32 degrees. As the coil continues to condense water, ice inevitably forms on freezing coil surfaces.
If the filter appears extremely dirty or clogged, install a new filter. Wait for the ice to melt off the coil, then restart the system. If icing recurs, shut down the system and call in professional help.
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