Testing An Attic Fan

They include rafters and ceiling joists that are damp or blackened with mold.

Testing an attic fan.

Reverse the leads on the capacitor. Inspect the attic if your attic is not sufficiently vented you probably won t have to look very hard to find signs. If there s a problem with the belt replace it with a new one. You may need to replace a circuit breaker an electrical outlet or one of the wire connections.

Also note down the power rating and the fan capacity in cubic feet per minute. Place the black probe on the white wire. It is preferable to do this test without the moving blade. Count to three while the leads on the meter charge the capacitor.

Sometimes you face an issue where the attic fan s motor comes on but the fan blades don t move. Step 1 test the fan motor. If the attic fan is plugged into an outlet use a voltmeter to make sure that the outlet is working. If the fan turns on the motor is still good.

Locate the thermostat casing and open it using a screwdriver. One static vent style is the turbine vent which uses wind to power its enclosed fan all it takes is a light breeze to rotate the blades and suck heat out of the attic view example on the home. Note down the temperature settings for later reference. The cause of the problem could be the belt.

Place the leads of the ohm meter on the wires that run from the capacitor to the motor. Look for movement of the needle on the meter toward infinite ohms. Note down the wiring before proceeding to remove it. Turn the attic fan off and unplug the motor from the thermostat.

Step 2 test the thermostat. You ll need to take out the outer casing of the fan and look to see if the belt is cracked sagging worn out or broken.