Why does an air conditioner freeze up?

If your air conditioner is low on refrigerant, then your air conditioner can freeze up. This is due to lower pressure inside the system itself. As your air conditioner’s evaporator coil drops below freezing, the moisture in your air will freeze as it comes into contact with your coil causing it to ice up.Click to see full answer. In this way, how do I keep my air conditioner from freezing up? To sum up, here’s what you need to do to prevent the A/C from freezing: Have the refrigerant level checked. Change the filter monthly. Keep the supply vents open. Have the fan speed increased. Have the thermostat checked out. Inspect the condensate drain weekly. Make sure any window units you have are angled correctly. Furthermore, how long does it take to thaw a frozen air conditioner? For your first step, turn the air conditioning system off and give the frozen evaporator coils a chance to thaw out. You can do this by shutting the unit off at the circuit breaker. Left to its own devices, it could take up to 24 hours for the coils to thaw completely. Herein, why does my air conditioner keep freezing up? There are many reasons why your AC unit may be freezing up. A freeze up can also be caused by low refrigerant and improper fan operation. Low refrigerant levels make the coils too cold, and a faulty fan prevents air from moving. Faulty thermostats and drainage problems are often causes of a freeze up.How do you fix a frozen AC coil? Step 1 – Thaw Frozen Condenser Coils Find your electrical breaker box and turn off the switch that controls power to your air conditioner, and allow the coils to thaw. Depending on the ambient air temperature around your condenser unit, it could take up to 24 hours for the coils to melt any ice that is plugging them.