Pennsylvania summers bring more than heat. July and August are peak months for severe thunderstorms across Chester County, and Shoemaker Heating and Cooling LLC, based right here in Honey Brook, PA at (610) 671-3595, sees a predictable spike in AC calls in the days following a major storm. Most of that damage is preventable with a few simple precautions.
Severe weather in this part of Pennsylvania is not rare. Caernarvon Township in neighboring Berks County was struck by an EF2 tornado in 2019, the most powerful to hit the county in over two decades, and the National Weather Service tracks dozens of severe thunderstorm warnings across the region every summer. Outdoor AC equipment sits directly exposed to lightning, wind debris, and the power surges that come with storm related outages.
How Storms Damage AC Systems
Lightning does not need a direct hit to cause damage. A strike anywhere on the local power grid can send a voltage spike through the lines into your home, and the compressor, circuit board, and capacitor inside your outdoor unit are especially vulnerable to that kind of surge. Wind and falling branches can also physically damage the outdoor unit’s fan, coil fins, or refrigerant lines.
A less obvious risk comes after the power is restored. When electricity returns following an outage, especially a widespread one affecting an entire neighborhood, many AC systems attempt to restart at the same time. This creates a demand spike on the local circuit that can strain a compressor that restarts before internal refrigerant pressure has had time to equalize.
Before the Storm
- Install a whole home surge protector at your electrical panel. This is the single most effective safeguard against lightning related damage to HVAC equipment and other electronics.
- During a severe thunderstorm warning, consider turning your AC off at the thermostat, or at the breaker for maximum protection, until the storm passes.
- Trim tree limbs near the outdoor unit and clear loose debris that could become windblown projectiles.
- Confirm the outdoor unit is secure on its pad and has not shifted from prior weather events.
After the Power Comes Back On
Wait 10 to 15 minutes after power is restored before turning your AC back on. This gives the refrigerant pressure inside the system time to equalize and reduces strain on the compressor, particularly if your entire street loses and regains power at the same time. Many newer thermostats include a built in delay for exactly this reason.
Once the system is back on, check that it is actually cooling and listen for unusual noise. A system that trips the breaker repeatedly, hums without starting, or runs without producing cool air after a storm may have sustained surge damage and should be inspected before continued use. Routine HVAC maintenance also gives your technician a chance to flag components that are more vulnerable to storm related failure before storm season arrives.
If your system will not restart or shows signs of storm damage, Shoemaker’s emergency HVAC service is available around the clock throughout Honey Brook and greater Chester County. Full repair and replacement details are available on our air conditioning services page, and our expanded service area now covers communities across Chester, Berks, Lancaster, and Delaware Counties.
Frequently Asked Questions
Storm Protection for AC Systems in Honey Brook, PA
Yes. Lightning strikes and grid fluctuations during storm restoration can send a power surge through your electrical system that damages the compressor, circuit board, or capacitor in your outdoor condenser unit. A whole home surge protector installed at your electrical panel is the most effective safeguard.
It is a reasonable precaution during severe thunderstorm warnings, particularly if lightning is frequent or a tornado watch is in effect. Turning the system off at the thermostat, or at the breaker for the most protection, removes it from the circuit during the period of highest surge risk.
The compressor needs the refrigerant pressure inside the system to equalize before restarting, which normally takes several minutes. Restarting immediately after power returns, especially if multiple neighbors’ systems restart on the same circuit at once, can strain the compressor and shorten its lifespan. Waiting 10 to 15 minutes before turning the system back on protects the equipment.
Look for fallen branches or debris on or near the outdoor unit, check that the unit is still level and has not shifted on its pad, and listen for unusual noise when it restarts. If the system does not turn on at all, or trips a breaker repeatedly, call for a diagnostic visit before running it further.
Yes. Shoemaker Heating and Cooling provides 24/7 emergency HVAC service throughout Honey Brook and greater Chester County, including after storm outages and surge related failures. Call (610) 671-3595 for priority response.