What a November furnace check in Live Oak looks like, minute by minute
The furnace has been off since March. Before it runs again in a closed-up house, somebody should look at it. Here is what that looks like, with the clock running.
7:30 a.m.: the dispatch
Picture a Suwannee County route day: it begins in Palm Coast before dawn and reaches Live Oak by mid-morning. Three furnace checks are on the sheet, one on each fuel the county uses. The order is set by geography: downtown first, then west toward Dowling Park, then south along US 129.
Who schedules a furnace check around here
Furnace maintenance is a smaller slice of the work in this market than air conditioning, and the people who book it tend to have a reason.
- Owners of older downtown homes on the City of Live Oak gas system, where the furnace is decades old and sits somewhere nobody looks at.
- County households on propane who want the gas side checked after eight months of the tank sitting idle.
- Families in manufactured homes with electric furnaces, usually after a winter where the bill spiked or the breaker tripped.
- Landlords and property managers with several units in town and no interest in a December emergency call.
- Anyone who has read about carbon monoxide and realized the furnace has never been inspected in the time they have owned the house.
Three furnaces, three mornings
9:40 a.m., a frame house two blocks off Howard Street. The gas furnace is under the floor, reached through a crawlspace hatch. It is a mid-efficiency unit from the 1990s on city gas. The technician’s first move is a carbon monoxide detector in the living room; the second is the combustion analyzer in the flue. The exchanger gets a camera. The flame sensor comes out gray with residue and goes back clean. The flue connection at the roof jack has a gap that gets sealed. Forty-five minutes.
11:30 a.m., a farmhouse off CR 250. Propane furnace in a utility room, tank in the side yard. The manometer goes on first, because propane and natural gas run at different pressures and a furnace set for the wrong one burns badly. The regulator gets soaped for leaks after a summer of disuse. The flame is checked for color and shape, the burners are brushed, and the owner is shown the yellow tips that mean a cleaning was due. Fifty minutes.
1:45 p.m., a double-wide south of McAlpin. Electric furnace in a hallway closet. No combustion, so the check is electrical: every heat strip amped under load, the sequencer timing watched, the limit switch tested, the blower wheel inspected, and the filter, which has not been changed since spring, replaced. A look under the home at the belly duct finds a sag that is costing heat. Thirty-five minutes plus the duct conversation.
What the check consists of, with a clock running
For a gas or propane furnace, the visit runs roughly in this order and takes about an hour.
| Minutes | What happens |
|---|---|
| 0-5 | Carbon monoxide detector placed; homeowner questions: smells, noises, rooms that stay cold |
| 5-15 | Furnace run from the thermostat; ignition sequence watched; flame signal measured |
| 15-30 | Combustion analysis in the flue; heat exchanger inspected by camera; flue and vent connections checked |
| 30-40 | Gas pressure measured at the manifold; burners cleaned; flame sensor and igniter inspected; propane regulator and connectors leak-checked |
| 40-50 | Blower, filter, limit and pressure switches; temperature rise across the exchanger compared with the nameplate |
| 50-60 | Thermostat calibration and settings; readings written on the sheet; recommendations explained |
An electric furnace skips the combustion steps and spends the time on elements, sequencers, relays and wiring, with a hard look at anything that ran on generator power during a storm outage.
Schedule a furnace check with Cook's
Our promise on a furnace check
Four things are true of every Cook’s furnace visit in this county.
Safety findings are not optional. A cracked heat exchanger or a carbon monoxide reading shuts the furnace down and gets explained in plain words, with the options laid out. We will not relight a furnace we would not run in our own house.
No repair without a yes. Anything found gets a price before it gets touched. A part that is wearing but working gets written on the sheet as “watch,” not sold.
The readings are yours. The sheet with the combustion numbers, pressures and temperatures stays with you. Next year’s gets compared with it.
The schedule is ours to keep. On a maintenance agreement, the fall furnace check and the spring cooling check go on Cook’s calendar and you get the reminder. Ask for the agreement tiers, inclusions and pricing. [[CONFIRM WITH JERRY]]
3:10 p.m.: back on the road
Three furnaces checked, one flue sealed, one regulator cleaned, one filter replaced and one belly duct scheduled. All three houses will light on the first frosty morning in December, and more to the point, all three will do it safely. The truck heads for the next stop. The homeowners do not think about heat again until March.
Before the first December frost: what gets asked
Does a furnace that runs thirty mornings a year still need a yearly check?
More than one that runs every day, in one respect: it sits idle for eight humid months, and corrosion, insects and dust do their work while nobody is watching. The check is less about wear and more about whether the thing is safe to light after a long rest. A cracked heat exchanger does not care how few hours it has run.
What gets measured on a gas furnace check that I could not eyeball myself?
Combustion gases in the flue, carbon monoxide in the supply air, gas manifold pressure, flame signal strength, temperature rise across the exchanger, and the inside of the exchanger cells on a camera. A homeowner can see the flame color and change the filter; everything on that list needs an instrument.
Will a fall check keep it from quitting on the coldest night?
It catches the predictable failures: a flame sensor that is almost too dirty to prove flame, an igniter with a crack, a pressure switch sticking, a limit tripping on a loaded filter. Those are most of the no-heat calls. A control board that fails without warning is rarer and is why the phone is still on the invoice.
Is October too early to book?
October is ideal. The furnace gets checked before the first cold snap, and the schedule is open because nobody is thinking about heat yet. Calling the week of the first frost means joining a line of people whose furnaces failed that morning.
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 PumpRepair, maintenance and replacement for the one machine that heats and cools a Suwannee County house.
- 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 RepairRepairs on gas-fired, propane and electric furnaces across the county, with a combustion check 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 rarely drops out of 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.
Furnace been off since March?
Book the November check with Cook's before the first frost does it for you.