What it means
Flame present with gas valve off. Extremely critical; furnace will not operate.
⚠ Call a profurnace
How it shows: Dual 7-segment display: 14
1Likely causes
- Field mis-wiring of 24 VAC to gas valve
- Gas valve stuck open
- Faulty furnace control
2Safe DIY steps
- Techniciancorrect wiring, replace gas valve or replace control
⚠ Safety firstIf you smell gas, do not touch any electrical switch or use a phone in the building; leave immediately and call your gas supplier from outside. Turn off electrical power at the furnace switch or breaker before opening any panel, and never bypass or jumper a limit, rollout or pressure switch. Gas valve, burner, venting, wiring and control-board work should be done by a licensed HVAC technician.
3When to call a pro
Call a licensed HVAC technician: immediately; this is a gas safety fault.
Find a local HVAC pro →Other Rheem codes
10
One-hour lockout, caused by repeated failed ignition (11), water sensed (59), dead blower (61), internal fault (93), flame lost 5 times (13) or unexpected flame (14).
12
Low flame sense: flame sense current is weak or marginal. Furnace keeps running.
11
Failed ignition. After four failed attempts the control enters one-hour lockout (10).
13
Flame lost after established.
30
Open fuse, usually from a 24 VAC short to common or ground.
33
Over-temperature (rollout) switch open: flames rolled out of the heat exchanger into the burner compartment.