Rheem Furnace Code 14: Unexpected flame
If you smell gas or a CO alarm sounds, leave the home and call the gas utility or 911 from outside.
Rheem furnace code 14 indicates unexpected flame. The (-)801T upflow/horizontal and (-)(-)80MSX manual lists 14 as “UNEXPECTED FLAME”. Match the full model to this manual before requesting a diagnosis. Give the contractor the displayed signal, the furnace model, and the point in the heating cycle when it appeared.
Talk to a contractor about your Rheem furnace code 14
Call (877) 565-3062One call reaches a contractor registered for your ZIP; ask the fee and the arrival window.
HVAC Responder is an independent referral service and is not affiliated with or authorized by Rheem.
HVAC Responder Editorial Team · Reviewed 2026-11-01 · Facts quoted from manufacturer documentation
What the Rheem manual says
(-)801T upflow/horizontal and (-)(-)80MSX; 92-24161-144-09 · PDF page 39.
The document “Rheem (-)801T installation instructions (92-24161-144-09), PDF” uses the wording UNEXPECTED FLAME
.
Discuss your Rheem furnace code 14 with a contractor
Call (877) 565-3062One call reaches a contractor registered for your ZIP; ask the fee and the arrival window.
How to describe the 14 condition
Unexpected flame is the condition reported by the control, rather than an instruction to try lighting the unit again. Give the exact displayed number and request service for the flame indication. Leave gas-valve, sensing, and control-circuit checks to the contractor.
Code family and related symptoms
What happens when you call about your Rheem furnace code 14
- Your call routes to an independent local contractor registered for your ZIP code.
- Ask the fee and the arrival window.
- The decision to hire stays with you.
One call reaches a contractor registered for your ZIP; ask the fee and the arrival window.
Sources and review date
- Rheem (-)801T installation instructions (92-24161-144-09), PDF · Read 2026-11-01
- CPSC Carbon Monoxide Fact Sheet · Read 2026-11-01