Why Portable Air Conditioner Not Cool. If the air filter is dirty or clogged there may not be enough air flowing over the evaporator coils and the coils can become too cold and frost over. For example a 5000 BTU air conditioner should be placed in a 100-150 sqft.

At least troubleshooting common portable air conditioner. This section covers problems that will stop the air conditioner from turning on or blowing air. Sunlight can also heat a room faster than your portable air conditioner can cool it.
Portable Air Conditioner Not Cooling Room.
These are self-contained units where each AC cools one room. Turn on and check whether there is cold air at the outlet under the air conditioning cooling mode 1. Air is not circulating properly. A portable AC unit can fail to properly cool off your space if it is not powerful enough the room is not properly sealed or the unit is dirty.
