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Home  /  HVAC  /  Low Inducer Voltage – Fix furnace problems before it becomes costly

Low Inducer Voltage – Fix furnace problems before it becomes costly

Sam Owens April 22, 2022 HVAC Leave a Comment
low inducer voltage

Prevention is the key to lower inducer voltage problems. Check your furnace inducer motor and replace it if needed. It may cost less, in the long run, to prevent a problem from becoming costly. In some cases, a low inducer voltage can be caused by a faulty heating element or other components inside the furnace. If this is the case, you may need to call a professional to fix the issue. Checking these components and/or replacing them as necessary can help you save money in the future. Preventing low inducer voltages from occurring in the first place is always the best strategy.

Indoor air temperature, humidity, and other conditions can drastically affect how efficiently your furnace performs. In addition, improperly functioning blower motors can also slow down your furnace’s operation. Follow this guide to troubleshoot and repair low inducer voltage if you’re experiencing this issue.

Contents

  • What causes low inducer voltage? 
    • Furnace inducer motor not starting
  • How to troubleshoot low inducer voltage 
  • Repairing low inducer voltage 
  • Heater element
  • Heater change-out 
  • Furnace inducer motor troubleshooting
  • Conclusion

What causes low inducer voltage? 

Inducer voltage is low when the current flowing through the inducer coil is less than usual. Inducer voltage can be caused by a faulty inducer motor, damaged wiring, or deteriorating contacts in the inducer motor.

Low inducer voltage can be caused by a faulty inducer motor, damaged wiring, or deteriorating contacts in the inducer mot. If the inducer voltage is below a certain threshold, the equipment will not work. In some cases, low inducer voltage may also be indicative of a problem with the electrical system itself. A faulty inducer motor can cause low voltage by causing resistance in the electrical circuit. Damaged wiring can also result in low voltages because of shorts and poor insulation. Finally, deteriorating contacts in the inducer mot can also cause low voltages. If these contacts are not cleaned or replaced on a regular basis, they may become corroded and cause low voltages.

Furnace inducer motor not starting

If your furnace fan will not turn on, or the inducer motor does not start, there may be a problem with the wiring or power supply to the furnace. A low inducer voltage can also cause the inducer motor to stop running. To diagnose and fix the problem, use the following steps: Disconnect all of the wires from the furnace fan and inducer motor. Check for voltage at each wire connection. If there is no voltage at any of the connections, then the problem is in either the wiring or power supply. If there is voltage at one or more connections, then check for continuity between each wire and its corresponding terminal on the furnace fan and inducer motor. Continuity exists between terminals, then replace defective components in either the wiring or power supply.

How to troubleshoot low inducer voltage 

One common furnace issue is low inducer voltage. Low inducer voltage can cause a reduction in the blowing speed of your blower motor and may result in a power outage if the blower shuts off completely. This issue can be repaired by installing a capacitor, which can be purchased from any electrical store.

Repairing low inducer voltage 

If the inducer motor voltage is low, your furnace will not operate at an optimal level. In this case, you can replace the inducer motor with a new one to solve this problem.

To replace the inducer motor:

1) Turn off power to the furnace before attempting to make any repairs.

2) Remove the fan from the blower compartment and remove the screws that hold it in place.

3) Unscrew and remove the inducer motor from its position on top of the blower compartment using a screwdriver.

4) Install a new inducer motor by following these directions in reverse order.

5) Turn on power to your furnace and allow it to run for a while before turning it off again. Your furnace should now be operating at an optimal level.

Heater element

If your furnace isn’t producing enough heat, the first step to troubleshooting is to check the heating element. The heating element can be tested with a voltage tester from an electrical supply store or by replacing it. You can also use a thermometer to measure the temperature at the air outlet and compare it to what the thermostat is set to. If the temperature at the air outlet doesn’t match what the thermostat is set at, you may have a bad heating element.

Heater change-out 

If you’re experiencing a common inducer voltage issue on your furnace, your first step should be to change the heater. A faulty heating element could cause a low inducer voltage. To fix this problem, replace the old heater with a new one and turn off the furnace before starting installation.

Furnace inducer motor troubleshooting

If your furnace inducer motor is running, but the inducer blade is not turning, the problem may be with low inducer voltage. Your furnace will not start unless the inducer has at least 24 volts. The low inducer voltage could be caused by one of three issues:

1) Low battery voltage: If the furnace starts at all, it will likely run on emergency heat if there’s a power outage, making it difficult to diagnose which component is causing the problem. You should see your local heating and cooling technician for professional help.

2) Bad wiring: You can check this by removing the cover panel to access wires that lead to the inducer motor and checking them with a voltmeter. They likely need to be replaced if they’re below 20 volts.

3) Defective inducer motor: This is also an easy fix if you have experience with electrical work and should only take about 30 minutes of labour time. Just replace it.

Conclusion

In conclusion, if you suspect your inducer voltage is low, the first step to troubleshooting is to measure the voltage on the inducer. If you cannot diagnose the problem, then call an HVAC professional.

Read More: HOW TO PATCH PLENUM

Tags: furnace inducer motor not starting, furnace inducer motor troubleshooting, furnace inducer motor wiring, inducer motor keeps running, inducer motor not coming on
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About Author

Sam Owens
Sam Owens

Sam is a writer who loves writing in the home, family, and pet niches. He graduated with a Bachelor of Arts degree in Elementary Education from a top university and spent time with my family, cooking, traveling. He enjoys working on personal projects and collaborating with others to create something great. When he is not writing or teaching, you can find him playing golf or spending time with his dog.

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