Two power companies, one county, and the August bill that says the heat pump is slipping
Whether your bill comes from FPL or from the co-op, a summer total that climbs year over year with no change in habits is a heat pump asking for attention.

FPL in town, SVEC past the city limits: reading the bill
Live Oak is an unusual market because the power company changes at the city line. Inside Live Oak, in Wellborn and in Houston, the bill comes from FPL. Almost everywhere else in the county, from the acreage lots west of town to the river properties and the farms around McAlpin and O’Brien, it comes from Suwannee Valley Electric Cooperative, headquartered right here and serving about 28,900 meters across four counties. Rates, programs and bill formats differ, but the heat pump does not care who sends the invoice, and the pattern of a failing one looks the same on both.
The pattern is this. July and August are the peak months everywhere in Florida, and in this county they are the hottest in the state, with afternoons near 94 and no breeze to break them. A healthy heat pump produces a summer bill that is high but stable from one year to the next, give or take weather. A slipping one produces a bill that climbs each summer while the thermostat setting never changes. The usual suspects, in order: a dirty or damaged outdoor coil, a slow refrigerant leak, a compressor losing efficiency, a duct that has pulled apart in the attic or under the house, or an oversized single-stage system that has been short-cycling since the day it was installed. In winter the same bill tells a second story: a sudden December spike means the electric strips are running when the heat pump should be, which is a thermostat or a reversing-valve problem.
The decision tree, branch by branch
When a Cook’s technician finishes the diagnosis, the conversation follows a tree, and you can walk most of it yourself from the nameplate date.
Under ten years old. Repair, almost always. Parts are available, the compressor likely has warranty left, and the efficiency of a new unit is not different enough to justify the spend. Fix it, add a surge protector if it lacks one, and put it on a maintenance schedule.
Ten to fifteen years. It depends on the part. Capacitors, contactors, fan motors, defrost boards and reversing-valve solenoids: repair. A compressor or an evaporator coil, especially on a system that uses R-410A as refrigerant prices rise: replacement starts to win, and we show you the numbers rather than the pitch.
Past fifteen. Any major part tips it to replacement, and so does a second repair in the same year. The exception is a system that has been maintained twice a year its whole life and is failing on something small; those earn one more repair.
Any age, after a flood or a lightning strike. Insurance usually drives this one. Flood-damaged equipment on river lots along the Suwannee is replaced and raised; lightning-damaged boards are replaced and the rest of the system is tested hard before anyone trusts it.
Any age, with bad ductwork. Fix the ducts first or alongside. A new heat pump on a torn belly duct under a manufactured home is a new bill, not a new result.

Call Cook's about your heat pump
Nameplates we work on
Cook’s installs Lennox and backs it as a dealer. Repair and maintenance cover far more than that: Carrier, Bryant, Trane and essentially every brand with a nameplate, including the builder-grade units in the newer subdivisions and the package heat pumps on the county’s manufactured homes. We carry universal parts that fit most of them and order brand-specific boards and compressors when a system is worth saving. The technician identifies the equipment on arrival and tells you what the path to parts looks like before you decide.
What the warranty does and does not cover
Heat pump warranties confuse people, so here is the plain version. A manufacturer’s parts warranty, typically ten years on a registered new system, covers the failed part itself. It does not cover the labor to replace it or the refrigerant to recharge the system, unless a separate labor warranty was purchased. Registration within the manufacturer’s window is what unlocks the full term; Cook’s registers every system it installs so you do not have to remember. On a repair to an existing system, the new part carries its own short warranty, and Cook’s stands behind the workmanship.
Two things void warranties here more than anywhere on the coast: lightning damage, which manufacturers treat as an act of nature, and running the system on a poorly regulated generator through a long outage like the two weeks after Idalia. A surge protector at the disconnect is the cheapest insurance on the pad.
Paying for it
A repair is paid at the visit, priced before the work. A replacement comes with a free written estimate and financing with low monthly payments on new high-efficiency systems; terms are set when you apply and we do not publish a lender or a rate.
Rebates depend on which side of the city line you live on. FPL customers can qualify for the utility’s A/C rebate on a system at SEER2 15.2 or above, paid through contractors enrolled in FPL’s program; ask where Cook’s enrollment stands. [[CONFIRM WITH JERRY]] SVEC members have a smart-thermostat program but, as of the co-op’s published offerings, no cash rebate on heat pumps; we confirm at the time of the quote. There is no federal tax credit for a heat pump installed now. Anyone promising one is selling you last year’s brochure.
Heat pump questions from Suwannee County homeowners
Why does the thermostat say Aux on a 45-degree morning?
Either the thermostat is calling for backup heat too early or the heat pump cannot keep up on its own. On a mild morning the strips should stay off. If Aux shows up above the mid 30s, the lockout setting is wrong, the outdoor unit is low on charge, or the reversing valve is not switching fully. Any of the three is worth a visit before the bill arrives.
The house has a cooling-only system and no heat at all. Can a heat pump replace just the outdoor unit?
Usually the indoor coil has to change too, since the two are matched and a heat pump coil is built for reverse flow. The air handler can often stay if it is in good shape and has room for strips. We price it both ways at the estimate.
What is the difference between a heat pump and the air conditioner I have now?
In summer, nothing you would notice; they work the same way. The difference is a reversing valve that lets the same machine pull heat from outdoor air in winter, which is far cheaper than making heat with electric strips. If the outdoor unit runs when the thermostat is set to heat, you already have one.
How many years should a heat pump last in this heat?
Twelve to fifteen is typical in Suwannee County; the long cooling season and the lightning both shorten the coastal figure. Maintained twice a year, with a surge protector and clean coils, the upper end of that range is realistic. Neglected, the compressor often goes first, around year ten.
Other services in Live Oak
- A/C ServicesRepair, tune-ups, replacement and duct work for every kind of Suwannee County house, including the manufactured ones.
- A/C RepairA house that cannot hold 76 on a 94-degree afternoon is broken, not normal. Diagnosis first, price before parts, same rate at midnight.
- A/C MaintenanceA spring and fall tune-up built for pine pollen, well-water drains and a cooling season that runs May through September.
- A/C InstallationReplacement systems sized for 94-degree afternoons, installed in a day, with the duct fixes the house actually needs.
- ThermostatsSmart and programmable thermostats wired for the equipment you actually have, set up for this county's seasons.
- GeothermalGround-loop heat pumps for one-acre lots and farm homesteads, where the dirt stays cooler than any July afternoon.
- Heating ServicesFurnaces, heat pumps, strip heat and propane, serviced across every age of house in the county.
- Heat Pump RepairThe week the heat pump switches modes for the first time since March is the week its problems show. Diagnosis, price, repair.
- Heat Pump MaintenanceSpring and fall visits for the two-season machine, with the age of the system deciding what gets checked hardest.
- Heat Pump InstallationNew heat pumps sized for 94-degree summers and 25-degree mornings, installed by Cook's crews with the duct work included.
- Furnace RepairGas, propane and electric furnace repair across the county, with a combustion check on every flame.
- Furnace MaintenanceA yearly check for gas, propane and electric furnaces before the first December frost, with a combustion reading on every flame.
- Furnace InstallationNew gas, propane and electric furnaces for the county's older homes, sized to the house instead of the old nameplate.
- Air QualityDehumidifiers, filtration and purification sized for a county where the dew point lives in the 70s and the house stays shut for five months.
- Indoor Air QualityTesting, filtration, ventilation and purification for houses that stay shut from May to October.
- Duct CleaningDuct cleaning and the honest version of it: when the ducts need a vacuum and when they need a new run.
- CommercialRooftop units, split systems and walk-in support for the shops, clinics, churches and farm offices of Suwannee County.
Bill climbing every summer?
Call Cook's for a heat pump diagnosis. Repair, replace or leave it alone: you get the honest one.