There are several reasons why your lights may flicker when your air conditioning (A/C) unit comes on. Some of the most common causes include:
Power fluctuations: Your A/C unit requires a significant amount of power to operate, and if it is drawing more power than your electrical system can provide, it can cause the voltage to fluctuate, which can result in flickering lights. This can be caused by a variety of factors, including a faulty or outdated electrical panel, loose wiring, or a malfunctioning A/C unit.
Motor starting: When your A/C unit starts up, the motor may require a large surge of power to get it going. This surge of power can cause the lights to flicker, especially if your electrical system is already stretched to its limits.
Loose connections: If the wiring or connections to your A/C unit or electrical system are loose, it can cause a drop in voltage, which can result in flickering lights. This can be caused by a variety of factors, including improper installation, wear and tear, or damage from storms or other natural disasters.
Overloading: If your A/C unit is too powerful for your electrical system, it can cause the lights to flicker as the system struggles to keep up with the demand. This is often the case when homeowners install larger A/C units without upgrading their electrical systems to support the increased demand.
To prevent lights from flickering when your A/C unit comes on, it is important to ensure that your electrical system is properly sized and maintained. This may involve upgrading your electrical panel, replacing old or damaged wiring, or replacing your A/C unit with a more efficient model. In some cases, you may need to consult with a licensed electrician from Las Vegas Mechanical - The A/C Guys to diagnose and resolve the issue.