what causes my central air unit to keep freezing up?

Answer 1

Either !. Stopped up filter or cooling coil. 2. Blower motor failing. 3. Low on freon or 4. Stuck contactor (outdoor unit won't shut off).

Answer 2

In short low air flow at the inside coil, low refrigerant charge, or a defective metering valve can all cause icing of the indoor coil. Make sure all vents are open especially the return air vents. Check for dirty filters, drapery or furniture blocking the vents. The rest is best left to a qualified technician. There is no defrost timers on air conditioning units, bleach will help clear algae in the drain line but not affect icing. Be careful with bleach, turn off the system before use, allow bleach to remain in the drain 30 minutes or so, and flush the drain with lots of water before turning the unit back on. Good Luck!

Answer 3

If you have good air flow, one thing that causes an air conditioner to freeze up, is setting the temperature on your thermostat too low. You shouldn't set an air conditioner so low that it never shuts off. It needs to defrost periodically and can't if you set the temperature too low. Try setting it at 72 degrees or higher to see if this will help.

Answer 4

If it is freezing up on the evap coil (The one inside). It is low on freon. If it is freezing up on the condenser coil (The one outside) it is overcharged with freon. Either way call a professional.

Answer 5

Low on Freon

Answer 6

You probably have a defective defrost timer.

It is a job for a technician.

Answer 7

you are either turning it down too low or you need to pour bleach down the drain to get it unclogged. i work at a vet and we have the same problem due to animal hair.

Answer 8

how to unclog air conditioner drain