Jacksonville, FL
Furnace and heat strip repair when Jacksonville turns cold
Electric air handler heat strips and gas furnaces repaired on the nights they're actually needed, with phones answered live 24 hours a day.
Quick answer
Why is my furnace not heating in Jacksonville, FL?
In Jacksonville a furnace that won't heat is usually an electric heat strip, sequencer or limit switch failure in the air handler, or on gas units a failed igniter or flame sensor. These parts sit idle most of the year, so they often fail on the first cold night.
Warning signs
Signs the heat side needs repair
Cool air on heat mode
Blower runs but the air isn't warm, often a strip, sequencer or igniter.
Burning smell at first startup
Normal dust burn-off for minutes; persistent smell means shut it off and call.
Breaker trips on heat
A shorted heat strip or failing element drawing too much current.
Gas furnace clicks but won't light
Igniter, flame sensor or gas valve problem.
Heat cycles on and off quickly
A limit switch tripping from restricted airflow or a dirty filter.
Warm only in some rooms
One strip stage out, or duct problems showing up once heat is called.
Overview
Heating repairs in a cooling city
Heating equipment here spends most of the year doing nothing, then gets asked to work hard on a handful of cold mornings. Parts that sit idle for months are the ones that fail first: heat strip elements, sequencers, limit switches, igniters and flame sensors.
Most Jacksonville homes heat with electric strips in the air handler, either as the only heat or as backup to a heat pump. Some older homes run a gas furnace. We repair both, diagnosing with meters and a combustion check rather than swapping parts until something works, and you get a written price before anything is replaced.
What we fix
Electric heat strip failure
Heat strips are coils of resistance wire inside the air handler, switched on in stages by sequencers or relays. When one stage fails, the house warms slowly or not at all. We check each element's resistance, the sequencers or relays, and the high-limit switches that shut the strips off if airflow drops. A tripped breaker on heat often points to a shorted element. Strips are usually replaced as a kit matched to the air handler, and we confirm airflow afterward so the new strips aren't overheated.
Gas furnace with no heat
A gas furnace goes through a set sequence: inducer fan, pressure switch, igniter, gas valve, flame sensor. We watch that sequence and find where it stops. A dirty flame sensor that shuts the burners off after a few seconds is common and quick to fix. A cracked hot surface igniter, a failed pressure switch or a blocked vent takes longer. Because it's gas, we also check the venting and run a combustion test before calling the job done, and we tell you what we measured.
Burning smell on the first cold night
The first time the heat runs each winter, dust that settled on the strips or burners burns off, and the house smells hot for a few minutes. That's normal. A smell that lasts, smells electrical, or comes with smoke is not. Turn the system off at the thermostat and call. We look for melted wiring, a failing blower motor or a strip touching the cabinet, all of which need attention before the heat runs again. We'll show you what we found.
How the job runs
How a heating repair call runs
- 1
Call
A dispatcher asks about the symptoms and books the next open slot.
- 2
Diagnose
Meter readings on strips and controls, or the gas sequence and combustion checked.
- 3
Price
One written price for the repair.
- 4
Repair
Parts replaced and airflow or venting confirmed.
- 5
Test
Heat run through every stage and supply temperature measured.
Why heat fails here on the coldest nights
Jacksonville's heating design temperatures sit around 27F to 32F, so the heat side of most systems only works hard a few mornings each winter. Most of the year it's idle while the house cools, and that long idle stretch is what makes strips, sequencers and igniters fail on the first real cold snap. On a heat pump, the strips are the backup that kicks in on those same mornings, which is why a strip failure shows up exactly when you notice it most.
DIY or call
What to check before calling
| Task | Safe to try yourself | Leave to a technician |
|---|---|---|
| Thermostat set to heat and above room temperature | Yes | If it's set right and nothing happens |
| Checking the air filter | Yes, a clogged filter trips limit switches | If a clean filter doesn't help |
| Resetting a tripped breaker once | Yes, once | If it trips again, leave it off |
| Opening the air handler panel | No, there's line voltage inside | Yes |
| Anything involving gas | No | Yes, and call the gas utility if you smell gas |
Brands we service and install
Trane, Carrier, Lennox, Rheem, Goodman, Daikin, Mitsubishi Electric, American Standard, Bryant, Ruud, Amana, Honeywell, York, Heil
Cost factors
What affects the cost of a heating repair
- Electric or gasStrip and relay parts differ in price from igniters, sensors and gas valves.
- Part availabilityHeat strip kits must match the air handler model.
- AccessAttic air handlers take longer to work on than closet units.
- Airflow problemsIf a dirty coil or blower caused the failure, that gets addressed too.
- Time of callCalls are answered 24/7; any after-hours rate is confirmed on the call.
Every heating repair is priced in writing after diagnosis.
FAQ
Furnace and heat strip questions
Is a burning smell normal the first time I turn on the heat?
A few minutes of dust burn-off is normal. A lasting or electrical smell is not; turn the system off and call.
Why does my breaker trip when the heat comes on?
Often a shorted heat strip element. Leave the breaker off after one reset and call.
Do you repair gas furnaces?
Yes, including igniters, flame sensors, pressure switches, gas valves and venting.
Can a dirty filter stop my heat?
Yes. Restricted airflow trips the high-limit switch and shuts the strips or burners off.
My heat pump blows cool air on heat. Is that a furnace problem?
It may be the heat pump or the backup strips. We check both.
Should I replace an old furnace instead?
If the heat exchanger or cabinet is failing, we'll price replacement and a heat pump conversion side by side.
What if I smell gas?
Leave the house and call the gas utility first. Then call us for the furnace.
Related services
Other work on the same system
Heat Pump Installation
Variable speed and standard heat pumps that cool all summer and heat on cold January nights.
Learn moreHeat Pump Repair
Heat pumps stuck in defrost, blowing cold on heat, or leaning on aux heat all night.
Learn moreFurnace Installation
Electric air handlers with heat strips and gas furnaces, matched to the cooling system.
Learn morePool Heat Pump Installation
Pool heat pumps sized to the pool and plumbed into the equipment pad.
Learn morePool Heat Pump Repair
Pool heat pumps that won't heat or show flow errors, diagnosed and fixed.
Learn moreCold house? Call and we'll get the heat back on
Phones are answered 24/7. We'll diagnose the strips or furnace and price the repair before any work.