When the GRU bill, not the thermostat, says the air conditioner is finished

The bill is the symptom

Here is a pattern we see across Northwest Gainesville. A homeowner pulls up two years of GRU statements and notices that July and August cost noticeably more than they did two summers ago, with the thermostat sitting at the same 76. The weather does not explain it; the city’s July average has been 90 and 72 for a long time. Something in the system is doing the same job with more electricity.

A high summer bill with unchanged habits points to a short list: a compressor losing efficiency as it ages, a refrigerant charge that has drifted, coils that have not been clean in years, ductwork leaking cooled air into a 130-degree attic, or an air conditioner that was never quite the right size for the house. The first three are repair-and-maintenance problems. The last two often end in an installation, and the age of the equipment decides which column you are in.

GRU’s territory covers Gainesville proper and nearby parts of Alachua County. Clay Electric serves most of the rural county, Duke Energy a few pockets, and the cities of Alachua and Newberry run their own systems. Whatever the logo on the envelope, the diagnostic logic is the same.

What we check before anyone talks about a new system

A replacement quote that skips the inspection is a guess with a price on it. Our visit covers:

1. The equipment’s age and refrigerant. A nameplate from before 2010 usually means R-22, which is scarce and expensive; that fact alone changes the math on any large repair.
2. Its actual performance. Temperature split across the coil, amperage against rating, refrigerant pressures. A tired compressor shows up in these numbers before it fails.
3. The ductwork. A static-pressure reading where the ducts meet the air handler, then eyes on the runs. In the 1970s-to-1990s houses that make up most of Gainesville’s owner-occupied stock, leaky or undersized ducts are frequently the real reason the bill is high.
4. The load. A room-by-room calculation using your windows, insulation, orientation and canopy shade. Oak shade on a Millhopper Road lot and full sun on a new Oakmont lot produce very different numbers for the same floor plan.
5. The electrical and the pad. Breaker size, disconnect, whether a modern variable-speed system needs a wiring change, and whether the pad has sunk. West of I-75, where the clay layer thins and sinkholes are more common, we look harder at settled or tilted pads.

Why Gainesville systems get replaced

A properly chosen new system typically runs a Gainesville house on meaningfully less electricity than a worn one from the 1990s or 2000s, and holds humidity better because it runs longer, gentler cycles. We will not put a percentage on your house until we have measured it.

Request a free installation estimate

What goes into the price

No two installations cost the same, and we quote only after the visit. The variables that move the number:

• Capacity and efficiency tier. Lennox builds systems in three tiers, from single-stage through variable-speed; the higher ones cost more up front and less per month.
• Heat pump versus straight cooling with electric heat. In a city with about seventeen freezes a year, a heat pump usually earns its small premium over the first few winters.
• Duct and electrical corrections. Sometimes nothing; sometimes the most important part of the job.
• Access. An attic air handler in a historic Pleasant Street house costs more labor than a garage closet in Tioga.
• Permit and inspection. Alachua County or City of Gainesville, depending on the address.

You can spread the cost of a new efficient system over monthly payments; the paperwork and terms are reviewed with you at the estimate, not posted online. Incentives vary by utility: Clay Electric members can claim a heat pump rebate, Duke Energy Florida customers in its scattered pockets can earn up to $1,000 toward replacement after a free Home Energy Check, and GRU customers can book an energy survey or a duct test. Ask about Cook’s participation in each utility’s contractor list before you count on a rebate. [[CONFIRM WITH JERRY]] Forget the federal 25C credit; it lapsed with 2025 and a 2026 install gets none of it.

When we tell you to keep what you have

A free estimate from Cook’s is not a sales script. We send people away with a repair recommendation when the system is under about twelve years old and the fault is a single component, when the ducts, not the equipment, are what’s failing, or when a tune-up and a recharge will plainly restore the numbers. We would rather be the company you call back in eight years.

Installation day, briefly

Old equipment out and refrigerant recovered legally; new pad and condenser set and leveled; air handler or coil installed; line set flushed or replaced; new filter drier; electrical and drain connections including a float switch; system evacuated to a deep vacuum and charged by weight; thermostat configured; full test under load; and a walkthrough with you. Most straight swaps finish in a day. Cook’s installs 24 hours a day, seven days a week, and does not charge extra for the hour.