Weather Watch: Storms Next Week—Protect Your Commercial HVAC

Summer thunderstorms are a fact of life in Tennessee. While the rain may bring a welcome break from the heat, the storms themselves can create new challenges for commercial HVAC systems.

Heavy rain, lightning, power surges, and sudden power outages can all affect the performance of your equipment. If your business depends on a comfortable environment for customers and employees, taking a few precautions before a storm can help prevent costly repairs and unexpected downtime.

At Repair Pros Services, Inc., we've seen an increase in HVAC service calls following severe weather. Here are some common storm-related issues—and what you can do to protect your system.

Power Surges Can Damage HVAC Components

Lightning doesn't have to strike your building directly to cause damage.

Nearby strikes and fluctuations in the electrical grid can create power surges that affect sensitive HVAC components such as:

• Capacitors

• Contactors

• Circuit boards

• Thermostats

• Compressors

Sometimes the damage is immediate. Other times, it weakens components that fail days or weeks later.

Consider Installing Surge Protection

Surge protection devices can help reduce the risk of electrical damage during severe weather and may save you from expensive repairs.

Brief Power Outages Can Stress Your System

When the power goes out, your HVAC system shuts down. When electricity is restored, the compressor may attempt to restart under heavy pressure.

Most modern systems include built-in safety delays, but repeated outages can still place additional stress on compressors and electrical components.

If your system doesn't restart normally after a power outage, don't continue cycling the thermostat. Have the equipment inspected to prevent further damage.

Heavy Rain Doesn't Hurt the Outdoor Unit—But Debris Can

Many business owners worry when they see rain pouring over their outdoor HVAC unit.

The good news is that commercial outdoor units are designed to operate in the rain.

The bigger concern is what storms leave behind:

• Leaves

• Twigs

• Dirt

• Grass clippings

• Trash and debris

These materials can block airflow around the condenser, forcing your system to work harder.

After a Storm

Take a quick walk around the outdoor unit and make sure nothing is blocking the airflow.

High Humidity Increases the Workload

Summer storms often leave behind extremely humid conditions.

Your HVAC system now has to remove both heat and excess moisture from the building.

This can result in:

• Longer run times

• Higher energy bills

• Increased wear on the compressor

• Reduced comfort indoors

If your building still feels humid even though the air conditioner is running, it's worth having the system inspected.

Check Your Air Filters

Storm season often stirs up pollen, dust, and airborne debris.

Dirty filters restrict airflow, making your HVAC system work harder just when demand is highest.

Replacing filters regularly helps:

✔ Improve airflow

✔ Increase efficiency

✔ Reduce operating costs

✔ Extend equipment life

Don't Ignore Warning Signs After a Storm

Pay attention if you notice:

• The system won't start.

• Warm air is coming from the vents.

• Weak airflow.

• Unusual noises.

• Burning odors.

• Water leaking around the indoor unit.

• The thermostat isn't responding.

These symptoms may indicate electrical or mechanical problems that should be addressed before they worsen.

A Simple Storm Preparation Checklist

Before severe weather arrives:

✔ Replace dirty air filters.

✔ Clear debris from around outdoor units.

✔ Inspect visible electrical disconnects for damage.

✔ Make sure condensate drains are flowing properly.

✔ Consider installing surge protection.

✔ Schedule preventative maintenance if your system hasn't been serviced recently.

Taking just a few minutes to prepare can help reduce the likelihood of an emergency service call.

Protect More Than Your Air Conditioner

If your business includes walk-in coolers, freezers, or ice machines, remember that these systems are also vulnerable to power interruptions.

After an outage:

• Verify that equipment has restarted properly.

• Check temperatures before returning to normal operations.

• Monitor for alarms or unusual noises.

• Inspect for water leaks or excessive frost buildup.

A quick inspection can help prevent food loss and identify problems before they become major repairs.

Final Thoughts

Summer storms are unpredictable, but your maintenance plan doesn't have to be.

A little preparation before severe weather—and a quick inspection afterward—can go a long way toward protecting your commercial HVAC and refrigeration equipment.

At Repair Pros Services, Inc., we help businesses throughout Chattanooga and the surrounding areas keep their HVAC, refrigeration, and hot-side equipment running reliably through every season.

If your system isn't performing properly after a storm, don't wait. Early diagnosis can often prevent a small problem from turning into a costly repair.