The first cold front after the Florida-Georgia game: a Jacksonville heating checklist
Jacksonville heat sits unused for eight months and then has to work on a 26-degree morning. Here is what to check yourself, when to stop, and what we do from there.
The weekend the heat comes on
Jacksonville does not ease into winter. The first real cold front tends to arrive around the Florida-Georgia game at EverBank Stadium in late October or early November, and the first freeze typically lands in early December. From there the city averages about 14 freeze nights a winter, three of them hard freezes at 26 degrees or below. That is not much by Georgia standards. It is exactly enough to find every weakness in a heating system that last ran in March.
So the first cold front is the decision point. Before you call anyone, run this list.
The first-cold-front checklist
- Set the thermostat to HEAT and raise it three degrees. Wait fifteen minutes. Warm air at the registers, even mildly warm, means the heat pump is working. Heat pumps blow air in the 90s, not the 120s a furnace produces, so “lukewarm” can be normal.
- Look at the thermostat display. If “AUX,” “EM HEAT” or a strip-heat indicator is lit on a 50-degree morning, the system is using its backup when it should not be.
- Step outside. On HEAT, the outdoor unit of a heat pump should be running. Silence outside with warm air inside means the strips are doing all the work.
- Check the filter. An eight-month-old filter choked with oak pollen from last spring restricts airflow in heat mode exactly as it did in cooling.
- Walk the house with a thermometer. A back bedroom ten degrees colder than the hall in a Riverside bungalow is usually a duct problem, not a heating problem.
- Gas furnace owners: confirm the gas is on at the meter and the furnace switch is on. Listen for the ignition sequence. A furnace that clicks and never lights is on the stop-and-call list below.
- Frost on the outdoor unit is normal for an hour on a cold morning. A solid block of ice at noon is not.
Where the homeowner’s job ends
Some findings are not homeowner territory, and the line is bright:
- A gas or sulfur smell anywhere near a furnace. Leave the house and call the gas utility first, then us.
- A carbon monoxide alarm. Same order.
- Breakers that trip when the heat engages.
- An electrical or melting-plastic smell at the air handler.
- Ice encasing the outdoor unit that does not clear.
- A furnace that repeatedly tries to light and fails.
- No heat at all with a hard freeze forecast and a baby, an elderly relative or a medical device in the house. That is an emergency, and Cook’s treats it as one whatever the hour, and the hour costs nothing extra.
What we do for Jacksonville heat
The city’s heating stock is mixed, and the service line matches it.
Heat pumps are the majority, from Oceanway to Yulee to the Southside. Repair, two-visit maintenance and replacement, with particular attention to the defrost cycle, the reversing valve and strip staging, because those three are where a Jacksonville heat pump wastes money.
Gas furnaces are common in the pre-1950 core served by TECO Peoples Gas. Ignition components, flame sensors, inducer motors, heat exchanger inspection with a camera and a combustion analysis every fall.
Electric furnaces and strip-only air handlers show up in older Arlington and Westside ranches and in manufactured homes across Baker and Nassau. Sequencers, elements and limit switches.
Ductless mini-splits heat the sunrooms, garage apartments and beach condos that never had duct. We service and install them.
Dual-fuel systems, a heat pump paired with a gas furnace, are the efficient answer for larger gas-served homes in Ortega and San Marco, and we design them.
Across all of it, the heating side is checked and recorded during the fall maintenance visit, which is why agreement customers rarely make the first-freeze call.
Aftercare: what we leave behind
A heating call ends with three things. The repair or tune-up itself, with the readings written down. A note on strip usage, because that single setting is the difference between a modest JEA bill in January and a shocking one. And a recommendation, if one is honestly warranted, about whether the system has another winter in it.
If it does not, the replacement conversation in Jacksonville is almost always a heat pump conversation, and JEA has offered a $200 Heating & Cooling rebate on qualifying ENERGY STAR systems meeting its Tier 1 thresholds, applied on the contractor’s invoice. The 2026 cycle closed October 10, 2026; ask whether it has reopened. [[CONFIRM WITH JERRY]] Baker County residents on Clay Electric have had their own heat pump rebate. Installations dated 2026 or later fall outside the federal 25C credit, which expired.
Between visits, change the filter before the first cold front, keep the outdoor unit clear of leaves and the camellia hedge, and let the system run on HEAT rather than switching to EM HEAT when a morning feels slow. Emergency heat is for when the heat pump is broken, and it is the fastest way to double a winter bill in a city that only needs heat twenty mornings a year.
Winter questions from a mostly-electric city
Why does the JEA bill spike in January even though the house never feels warm?
Almost always because the electric heat strips are carrying the load instead of the heat pump. A stuck reversing valve, low refrigerant, a bad defrost board or a mis-wired thermostat can all push a system onto strip heat, which draws several times the current for the same warmth. One heating visit usually finds it.
Is natural gas heat an option on my street?
In much of the urban core, yes. TECO Peoples Gas distributes natural gas in Jacksonville, and many Riverside, Avondale, San Marco, Springfield and Ortega homes have gas furnaces. Newer subdivisions and most of Nassau and Baker are electric or propane. We service gas, propane and electric heat, and we will say which of them your house can actually get.
There's a scorched smell the first time the heat runs each year. Should I worry?
A faint dusty-burning smell for a few minutes on the first cold night is dust cooking off the strips or the heat exchanger after eight idle months. It should fade within the hour. A smell that persists, smells electrical or plastic, or comes with a tripped breaker is a reason to shut the heat down and call us.
What's a realistic lifespan for a heat pump on the First Coast?
Twelve to eighteen years is the honest range. Beachside units at Mayport, Atlantic Beach and Fernandina lose years to salt. Inland units in Mandarin or Macclenny that get two tune-ups a year reach the top of the range. Systems that ran strips all winter and short-cycled all summer do not.
Other services in Jacksonville
- AC servicesRepair, tune-ups, replacements and duct work for Duval, Nassau and Baker, from one phone number.
- AC repairDiagnosed, quoted, then fixed. Nights and weekends at the daytime price, every brand on the street.
- AC maintenanceA visit ahead of the heat and another after it, built around Jacksonville's pollen, storms and salt.
- AC installationA decision tree for repair versus replace, then a load-calculated install with the JEA rebate handled on the invoice.
- ThermostatsSmart, programmable or plain. Matched to the wiring your house actually has, with the JEA rebate in mind.
- GeothermalGround-loop heat pumps for large Jacksonville lots, Nassau and Baker acreage, and commercial sites with parking to drill under.
- Heat PumpThe system that cools eight months and heats fourteen nights. Repaired, maintained and replaced by a Lennox dealer.
- Fixing heat pumpsCapacitors, boards, reversing valves, defrost controls and compressors, any brand, any hour, same price.
- Heat-pump tune-upsSpring and fall visits that test both modes, because a heat pump that passed August can still fail the first freeze.
- Installing heat pumpsLoad-calculated Lennox heat pumps, set above the flood line and behind a surge protector, with the JEA rebate on the invoice.
- Furnace RepairIgniters, flame sensors, inducers, sequencers and heat exchangers, diagnosed with a meter and a camera, not a guess.
- Furnace MaintenanceCombustion analysis, camera inspection and a cleaned flame sensor before the first freeze, whether the furnace burns gas or propane or runs on strips.
- Furnace InstallationGas and propane furnaces, dual-fuel pairings and the honest case for skipping the furnace altogether.
- Air QualityHumidity, pollen, dust and musty air, traced to the way each Jacksonville house was built and fixed accordingly.
- Indoor airMeasured assessments for houses and businesses, then filtration, dehumidification, ventilation and duct sealing matched to the readings.
- Duct CleaningA look inside first, then cleaning, sealing or replacement, whichever the ducts actually need.
- CommercialRooftop units, split systems and three-phase equipment for offices, restaurants, shops and medical suites across Duval, Nassau and Baker.
Freeze warning and no heat?
Someone answers at 2 a.m., and a Mandarin call at 2 a.m. is billed like one at lunch.