If you are experiencing the problems caused when your air conditioner becomes a solid block of ice then you need to figure out the real reason why it does or is doing that.
There are a few things that can happen to cause this unpleasant happening.
- The air flow over the coil is choked off to the point where the coil starts to become to cool because not enough air is flowing over it to keep it warm.
- Check air filter, if dirty clean it. (This is a very common problem)
- Check supply vents in building to make sure enough are opened to allow air flow.
- Check blower motor to see that it is operating at full speed.
- Return air temperature may be too cool. (below 65F)
- The indoor coil it’s self may be plugged with dirt. Clean with a good indoor coil cleaner.
- The outdoor air temperature maybe to cool which makes the indoor coil run too cold.
- Install a head pressure control to keep the high side pressures up.
- The unit may be low in refrigerant. This is often the first thing that gets the blame for causing this problem. Actually it should be the last thing to check after all the other possibilities are thoroughly checked.
If you have a coil that is froze up to a chunk of ice, then you need to remove power to the outdoor unit. Allow the indoor fan/blower to run to try to move air over the coil and thaw it out.
After the coil is completely thawed, then restore power and determine the cause of the freeze up.
A heat gun or hair dryer can assist in the deicing process. Towels and a wet/dry shop vac can help to keep the mess to a minimum also.