Carrier · Status code
Carrier 59SC6A status code 14: flame-loss lockouts during a heat request
Major code 14 records repeated flame losses during one heating demand. Minor 14.2 means flame was lost three times after roughly 70 seconds of heating; minor 14.3 means seven flame-loss events accumulated during one heat request and the control locked out.
On the control
- Code
- 14
- Minor
- 14.2 · 14.3
- Door LED
- 1 short flashes then 4 long
- Controller
- 59SC6A integrated furnace control with 3-digit LCD display and door LED
- Applies to
- Carrier Comfort 96 (59SC6A)
- Manual
- 59SC6A-01SI REV D
What each minor code says, verbatim
| Display | Manufacturer wording |
|---|---|
| 14.2 | Flame lost 3 times after 70s of heating |
| 14.3 | Lockout - 7 loss of flame events during a heat request |
A code is a condition, not a diagnosis
Flame loss mid-cycle is not a failed ignitor: the burner lit and then the flame signal stopped. Fouled flame sensors, flame disturbance from venting, gas-pressure fluctuation, condensate or intermittent connections all produce it. The stored fault history shows how the events accumulated.
Which furnaces this applies to
Documented for Carrier 59SC6A Comfort 96 furnaces in installation instructions 59SC6A-01SI REV D. On the single-stage Comfort label the set ends at 14.3; the two-stage Performance 96 label adds a separate pressure-switch event sub-code.
Scope: Carrier 59SC6A Comfort 96 furnaces with the on-board 3-digit display control. Not sure which control you have? Send us the full model number from the rating plate.
Safe things to look at first
- Read the full code on the control display through the door, including any minor digit (for example 33.2), and write it down.
- Look, without touching, for obvious conditions you can report: snow or ice at the vent terminations, water on the floor, a loaded filter, a condensate pump that is full or off.
- Note whether the furnace still heats at all, and how long it runs before the code returns.
- Note whether the code appears minutes into a cycle or immediately, and whether the furnace relights between events.
- Check the vent and intake terminations for snow, ice, leaves or a nest, and the floor around the furnace for water.
Do not
- Do not bypass or jumper the door switch, limit switches, rollout switches or pressure switches.
- Do not open the burner compartment, disconnect tubing, or adjust the gas valve or gas pressure.
- Do not keep cycling power to force the furnace to relight; repeated resets hide the fault and can allow unburned gas to build up after ignition failures. If the code returns, stop and call.
What a technician does
- A technician measures flame signal with the furnace running, inspects the flame sensor and burner area, checks gas supply pressure and reviews the stored fault history.
Related components and symptoms
Questions people ask
Flame keeps going out after the furnace runs a while. What causes that?
The usual suspects are a fouled flame sensor, condensate interference, venting that starves combustion or an intermittent gas supply. A technician tests each cause with the furnace running.
Seeing code 14 on your Carrier?
Tell us the full code, the model number and whether the furnace still heats on low. BC Wide prioritizes no-heat calls across Greater Vancouver.