What happens if the air flow on the outdoor fan is blocked?
What happens if the air flow on the outdoor fan is blocked?
Expert
Maestro
Intake air should be unobstructed for at least 1 to 3 feet adjacent to the unit (depending on the manufacturer's recommendations). The clearance on the exit side or top should be 4 to 6 feet. The airflow through the outdoor fan may be blocked on the intake or exhaust side. A clogged, damaged or corroded condenser coil can block the air supply to the fan.
- A cover left on inadvertently will obviously block both the intake and discharge.
- A tree branch on the top of the unit will obstruct the discharge.
- Condensers under decks often have obstructed flow.
- Shrubs, plants, fences and walls that are too close will obstruct the airflow.
Partially or totally restricted fans will lead to nonperformance and possible compressor failure.
Look at the airflow into and out of the fan.
Some people maintain that air conditioning condensers should be kept out of direct sunlight. Many manufacturers do not consider this a significant issue. Incidentally, manufacturers of heat pumps consider it an asset if the unit is located in the sun.
When checking the operation of the outdoor fan, the air coming off the fan should be warmer than the ambient air temperature, even on a hot summer day. This is one indication that the system is operating properly.
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