Leaving the air conditioner (AC) on during a power outage can potentially cause damage to the unit, especially when the power is restored. Here's why:
Power Surges: When the power comes back after an outage, there can be a surge in electrical current, which may be higher than normal. This sudden increase in voltage can damage the electrical components of the AC unit.
Voltage Fluctuations: During a power outage, the voltage supply may not be stable. Voltage fluctuations can also harm sensitive electronic components within the AC unit.
Compressor Stress: If the AC is running when the power goes out, the compressor may not have a proper shutdown process. When the power is restored, the compressor may start under high-pressure conditions, leading to potential damage.
Brownouts: In some cases, the power may not fully restore after an outage, and the voltage may drop below the required level. This can cause the AC unit to struggle to operate and result in damage to the compressor or other components.
To protect your AC unit during a power outage, it's generally recommended to turn it off when you know the power will be out for an extended period. If you expect the outage to be brief, it's still a good idea to turn off the AC until the power stabilizes to avoid potential issues with voltage fluctuations.
Additionally, consider using surge protectors or Uninterruptible Power Supply (UPS) devices to protect electronic devices, including your AC unit, from power surges when the electricity returns. These devices can help regulate the voltage and prevent damage during power fluctuations.
If you're unsure about the best course of action during a power outage or want to safeguard your AC unit, it's a good idea to consult with an HVAC professional for specific guidance based on your AC model and local power conditions.