For homeowners, an air conditioning (HVAC) system is a significant investment and an essential part of ensuring year-round comfort. With proper maintenance, an AC unit can last a great deal of time, but in the case of an electrical storm, an unexpected power surge can take your unit cleanout.
In this article, our HVAC experts explain how power surges can affect your AC unit, and how you can protect it from potential damage.
Yes, a power outage from a storm can absolutely damage an AC unit. HVAC systems often have little room for sudden voltage fluctuations, and so when a power surge or outage occurs, it can damage compressors, motors, circuit boards, and other components within the air conditioner.
If your AC unit fails to turn on after a storm, it may require outright replacement if the electrical damage is bad enough.
Modern HVAC systems with inverter technology are particularly susceptible to electrical issues. Inverter systems rely on precise DC voltage converted from the AC current to operate. When too much or too little AC voltage flows to the system, it can disrupt the inverter and lead to breakdowns.
Even brief power anomalies during storms can be problematic for these sensitive electronics. Damage can range from small malfunctions that turn into bigger issues over time, or the unit may just stop working altogether immediately.
Power outages, surges, and blackouts are not uncommon during storms, leading to unforeseen damages for appliances and electrical devices, and HVAC systems are no different.
The most effective way to shield your AC unit from electrical damage is to install a dedicated HVAC surge protector. Like the surge protectors used for computers and TVs, these devices are wired into the electrical supply line and prevent power spikes from reaching your HVAC components. The surge protectors absorb excess voltage, shielding the air handler, condensing unit, and other parts from damage.
AC unit surge protectors can be hardwired to the outside unit, the inside unit, or even directly to the high-efficiency motors that operate using DC voltage.
Given the high costs associated with replacing or repairing AC unit components like high-efficiency motors, compressors, and circuit boards, homeowners are increasingly opting to install an HVAC surge protector.
For those looking to add an extra layer of protection, there are surge protectors that also come with a voltage monitor. This device not only safeguards your HVAC system from power surges but can also shut down the unit if the voltage goes beyond set parameters. This preemptive measure can prevent severe damage from voltage fluctuations and save homeowners from costly repairs or replacements.
It might seem excessive, but consider this: the one-time cost of a surge protector pales in comparison to that of replacing an entire AC unit due to storm damage.
Surge protector installation is straightforward. An HVAC technician will mount the device outside next to the condensing unit and connect it to the electrical supply. This provides broad coverage across the entire system.
Though not always necessary, some homeowners opt for additional surge protectors on the air handler inside and on the blower motor for maximum protection.
While power disturbances are a significant concern, homeowners must also be aware of the physical damage that storms can cause. Debris, falling branches, or even excessive snow and ice can impair the performance of outdoor units.
As a rule of thumb, keep the surrounding area of your outdoor unit clear, and proactively clear dangerous tree branches before the next big storm rolls in. For those in regions prone to winter storms, see our detailed steps on how to winterize your HVAC system.
Given the changing seasons and the unpredictability of weather events, regular maintenance of your HVAC system is vital. As we’re entering the fall season, now is an excellent time for homeowners to schedule an inspection.
Your comfort and investment are worth every ounce of prevention!
Regular maintenance and timely inspections can make a significant difference in the longevity and performance of your HVAC system. And if your current AC unit lacks a surge protector, an experienced team of HVAC technicians can perform the installation and test it to ensure you’re ready for the next storm.
Rod Miller is here to answer your questions on HVAC maintenance and to provide any required replacement services. If you’re experiencing malfunctioning or damage to your AC unit after a power outage or electrical storm, contact us today for maintenance assistance.
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