Bryant 315AAV Error Code 14: Ignition Lockout
What Does Code 14 Mean?
Status code 14 on the Bryant 315AAV is the ignition lockout that follows repeated failures to establish and prove a burner flame. The control makes four ignition attempts; if it cannot detect a proven flame on any of them, it locks out and stops trying for 3 hours so it does not keep cycling gas into a furnace that will not light.
Code 14 is the end state of the retry sequence reported by status code 34 (ignition proving failure). Code 34 is what the control flashes while it is still retrying — the igniter heats, the gas valve opens, but the flame-sensing rod cannot confirm a stable flame. After those retries are exhausted, the code becomes 14 and the burners stay off. On this induced-combustion design the inducer still purges between attempts, so you may hear it run without the burners staying lit.
The most common cause is a dirty or weak flame sensor that cannot pass enough microamps to prove flame, followed by a worn hot surface igniter and gas-supply problems such as a closed manual valve or low inlet pressure. Because the fix involves the flame sensor, hot surface igniter, and gas system, this is diagnosed and repaired by a technician rather than the homeowner.
What You'll Notice
- The furnace tries to light several times, then goes silent and produces no heat
- You may hear the inducer run and the igniter glow, but the burners never stay lit
- The status LED flashes one short then four long flashes after the furnace has given up
- The house stays cold and the furnace does not retry for a long stretch (up to about 3 hours)
Common Causes
| Cause | Likelihood | DIY? |
|---|---|---|
| Dirty or faulty flame sensor | Most common | ✗ Call a pro → |
| Faulty hot surface igniter | Common | ✗ Call a pro → |
| Gas supply issue (valve closed or low pressure) | Common | ✗ Call a pro → |
How This Is Diagnosed
A technician works the ignition sequence in order: verify the manual gas valve is open and inlet pressure is adequate, confirm the hot surface igniter reaches temperature, then measure the flame-sensor signal (the manual specifies roughly 4 to 6 microamps DC, with about 5 nominal). A low or unstable microamp reading points to a fouled or failing flame sensor; a no-glow igniter points to the igniter; no gas points to the valve or supply. The flame sensor must also be checked so it is not grounded.
When to Call a Professional
This code involves components that are not homeowner-serviceable, so have a licensed HVAC technician diagnose and repair it. Keep in mind:
- The furnace repeatedly locks out on code 14 and will not stay lit
- You confirm the gas is on to the house and other gas appliances work, yet the furnace still fails to ignite
- The igniter does not glow, or the burners light briefly and then drop out
- The code returns after each 3-hour auto-reset
Frequently Asked Questions
What is the difference between code 14 and code 34 on the Bryant 315AAV?
Code 34 is the ignition proving failure the control shows while it is still retrying. Code 14 is the lockout after four failed attempts, when the furnace stops trying for about 3 hours.
Will the furnace reset itself after code 14?
Yes, the control auto-resets after about 3 hours and tries again, but if the root cause — often a dirty flame sensor or worn igniter — is not fixed, it will simply lock out again.
Why does it try several times before locking out?
The control allows four ignition attempts to ride through a momentary problem. Locking out after that prevents it from repeatedly releasing gas when it cannot prove a flame.
Sources
✓ Verified against manufacturer service manual — March 2026