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Air Conditioner Not Turning On? It’s Likely an AC Wiring Issue

Heating and cooling systems use 240 or 120 volt power wiring to run the motors, and 24 volt control wiring to communicate between the thermostat and indoor and outdoor units. AC wires are made to withstand harsh temperatures and electrical loads. But, weather can wear down the insulation and cause wire damage, such as the wires becoming brittle or allowing water to enter the cable. The unit outside can also be an inviting haven for rodents, who are known to chew and damage ac wires.

No matter what the source of the wire damage, this issue can cause problems such as your AC not turning on, or the rise of a burning smell from your AC.

Check For AC Wiring Issues

From harsh weather conditions to hungry rodents who gnaw at everything in their path, there may be several sources causing your AC wiring issues. While most electrical work is best left to an electrician, there are a few things you can do to troubleshoot your AC wiring issues.

How To Check For AC Wiring Issues

  • If your circuit breaker is tripping often, you can test to see if it's a fault of the AC wire set. Find the breaker that connects to your AC system and turn it off then back on. Wait for your AC system to restart and keep an eye on it. If the breaker trips again a short time later, the AC power system may be at fault.

  • When your air's temperature hits the thermostat set point, your AC system should turn off. If it doesn't, there may be an issue with the power system in your AC unit.

  • Pay attention to the operating behavior of your AC system. If your cooling system starts and then stops shortly after, it's short cycling. Short cycling is often a result of damaged or faulty AC wires or an oversized system.

What To Do If You Have AC Wiring Issues?

If you determine there’s something wrong with your AC wires, especially a burning smell, it’s time to hire an electrician to inspect your unit and fix any AC wiring issues.

Need a helping hand? Connect with one of our Remote Assist technicians who can help you troubleshoot and diagnose your home’s AC wiring issues.

NOTE: This content is for informational purposes only, and HomeX and its affiliates disclaim all liability related to it. If you decide to perform any tasks based on this information, you assume all risks, including the risk of loss or damage to property or personal injury.

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