A/C Unit Icing Over?

Question

The copper lines on my A/C unit iced over. The outside unit still runs, but no A/C flows in the house. "Fan Only" doesn't even work. The unit is just over a year old.

What causes this?

Answer 1

your unit is low on freon and needs to have the leak fixed and recharged with freon....the condensing coil in your air handler is froze solid thats why your fan isnt blowing no air

Answer 2

Shut down the outside condenser immediately, let the lines thaw out and that coil inside the air handler is froze over too.

What has happened is either there is little or no air flow or a shortage of Freon or Puron. When the unit has a leak and freon is lost, the inside coil freezes and so does that LARGE copper line running to the outside unit.

First get the air handler or blower to run. Otherwise that inside coil and that large line will freeze.

If your air handler/blower is running fine, then the unit has lost freon. Those froze or sweating lines are an indicator of that for sure.

Answer 3

Your A/C is set too cold. Set it to heat and leave it on if it can heat up. This will remove the ice inside the copper tubes. Otherwise, you can play some steam over the copper tubes or switch it off entirely and wrap hot rags over the tubes. You would have to check whether you still have gas inside the tubes as sudden cold can cause the tubes to leak by either cracking a tube or at the joints through contraction. Your A/C is probably just out of its warranty period, so it will cost you many to repair. It may be cheaper to replace the whole unit than repairing it. Invite a local A/C technician over for a beer and a free look before you spend money.

Answer 4

The A/C unit freezes most often from one of the following causes:
1. Filter is dirty, causing low air flow across the evaporator. This is both easy and cheap to replace.
2. Your A/C is low on it's freon charge. This must be confirmed by an A/C service person. They can top it off if necessary (but freon is expensive).

So, check and change your filters. Turn off the A/C for a couple of hours to allow everything to melt. Then you can try to run it again and watch for the freezing again.

Answer 5

Your thermostat is set too cold. Leave the unit off til the ice melts and raise the temperature a few degrees.

Answer 6

if its just over a yr, most manufacture warranties are 5 yrs. only a yr on labor probably. you might just get away with a service call fee