How To Test Draft Inducer Motor

Draft inducer motors are used in HVAC systems to draw in outdoor air and circulate it through the building. In order to test a draft inducer motor, it is necessary to first identify the problem. A few common problems with draft inducer motors are: a lack of power, noise, vibration, or an inability to start. Once the problem has been identified, specific tests can be performed to isolate and correct the issue. One way to test a draft inducer

How To Test Draft Inducer Motor

The draft inducer motor is responsible for drawing the air into the furnace and can be tested with a multimeter. First, remove the motor from the furnace and set it on a stable surface. Remove the cover of the motor and locate the two wires leading to the motor. Set the multimeter to volts and touch one probe to each wire. The multimeter should read 12 volts. If it does not, then there is a problem with the wiring or the motor itself.

A voltmeter, screwdriver, and wire strippers.

  • Observe if the draft inducer motor is running
  • Check to ensure that the draft inducer motor is properly plugged into the electrical outlet and the furnace
  • Turn on the furnace power

below: -Check for continuity between the motor leads and the terminal block. -Check for voltage at the motor leads. -Measure the current draw of the inducer motor. -Inspect the condition of the motor windings.

Frequently Asked Questions

How Do You Troubleshoot A Furnace Inducer Motor?

When troubleshooting a furnace inducer motor, you should check the following: -Power supply -Fuse or circuit breaker -Motor -Wiring

How Many Ohms Should Inducer Motor Have?

The inducer motor should have a resistance of 4.7 to 5.5 ohms.

How Do You Diagnose A Bad Inducer Motor?

There are a few different ways to diagnose a bad inducer motor. One way is to check the amp draw on the motor. If it is drawing more amps than it should, then it is likely bad. Another way to diagnose a bad inducer motor is to listen to it while it is running. If it is making any strange noises, then it is likely bad.

In Summary

Testing a draft inducer motor is not difficult, but it does require some basic tools and knowledge. The first step is to remove the cover of the motor and disconnect the wires. Next, use a voltage tester to ensure that there is no voltage present in the wires. Once this is confirmed, use a continuity tester to check that there is continuity between the two terminals. If there is not, the motor needs to be replaced.

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