Rheem R96VA0702317MSA Error Code 10: One-Hour Lockout
What Does Code 10 Mean?
A code 10 on the Rheem R96VA0702317MSA indicates the furnace has entered a one-hour safety lockout and will not provide heat during this period. Cooling and fan-only modes continue to function normally. The lockout resets automatically after one hour, at which point the furnace will attempt to operate again. Code 10 is never the root cause by itself — it is always paired with another fault code that identifies what triggered the lockout.
The furnace control board (IFC) enters this lockout under several conditions: four consecutive failed ignition attempts (paired with code 11), five consecutive flame losses after successful ignition (paired with code 13), an unexpected flame detected when the gas valve should be off (paired with code 14), repeated water sensor activations (paired with code 59), a dead blower after the main limit has been open for more than 150 seconds (paired with code 61), or an internal control fault (paired with code 93). When in lockout, the display alternates between code 10 and the companion fault code.
Waiting for the one-hour reset will allow the furnace to attempt operation again, but if the underlying problem has not been corrected, the furnace will simply re-enter lockout. The companion fault code is critical for diagnosis — a technician must identify and repair the root cause before the furnace will operate reliably.
Common Causes
When to Call a Professional
Contact a licensed HVAC technician if:
- If the furnace enters lockout repeatedly after the one-hour reset, call a technician to diagnose the companion fault code displayed alongside code 10 — the lockout itself is not the problem, it is a symptom of the underlying fault
- A technician should check for the paired fault code (11, 13, 14, 59, 61, or 93) and repair the root cause — ignition system, flame sensor, gas valve, condensate system, or blower motor as appropriate
✓ Verified against manufacturer service manual — March 2026