Why Do AC Coils Go Bad?

A Real Broward County Repair Story

When we opened up a customer's AC system recently, we found something that stops most homeowners in their tracks: a cracked coil pan that had damaged the coil box beyond repair. A cracked drain pan and leaking coil this usually means a full replacement, and that's not a small job or a small bill.

But there was good news. The coil itself was still under manufacturer warranty. That one detail meant we could replace the damaged components without charging the homeowner for parts that were still covered. It's a good reminder of why we always check warranty status first, before we ever write up a quote.

What Happened

During a routine inspection, we found the coil drain pan had cracked, which had compromised the surrounding box. Left alone, this kind of damage leads to water leaks, reduced efficiency, and eventually a bigger, more expensive failure. The pan and box needed to come out and be replaced.

Because the coil unit was still within its warranty window, we were able to source the replacement parts at a fraction of the normal cost and pass those savings directly to the homeowner. Same repair, same result, but a much smaller bill.

Why Do AC Coils Go Bad?

Coil problems don't usually happen overnight. Here are the most common reasons we see coils and their surrounding components fail here in South Florida:

Corrosion
Florida's humidity and salt air are tough on metal. Over years of exposure, coils and pans can corrode, weaken, and eventually crack, especially in coastal areas like Broward and Palm Beach County.

Refrigerant leaks
Small, slow leaks in the coil can go unnoticed for a long time. They quietly reduce your system's efficiency while also eating away at the coil itself.

Dirt and debris buildup
When a coil is coated in dirt, dust, or grime, it has to work much harder to do its job. That extra strain shortens its lifespan.

Age
Most coils start to break down somewhere between 10 and 15 years, even in systems that have been well cared for. It's simply a matter of time and wear.

Skipped maintenance
Small issues, like a minor drainage problem or an early crack, are easy and inexpensive to catch during a routine tune-up. Left unchecked, they turn into bigger and costlier repairs down the road.

The Takeaway

Regular maintenance is the best way to catch coil issues while they're still small. And when a repair is unavoidable, it always pays to check whether parts are still under warranty before assuming the worst about the cost.

If your system is acting up or it's been a while since your last tune-up, we're happy to take a look.

Ready to Schedule Service?

Call us at 954-729-9956 or email CHS.HVACPros@gmail.com to schedule an inspection or repair. We serve all of Broward County and Palm Beach County from Lantana south through Boca Raton.

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