Rheem R96VA0702317MSA Error Code 10: One-Hour Lockout

What Does Code 10 Mean?

Code 10 is not itself a component failure — it is the Rheem R96V Integrated Furnace Control (IFC) shutting heat down for one hour because it has counted a repeating problem it will not keep retrying through. On this condensing, two-stage, variable-speed furnace the control watches every heat call closely, and several different fault patterns all funnel into this same lockout.

The IFC posts code 10 after any of these: four failed ignition attempts in a row (it alternates code 10 with code 11, Failed Ignition), flame lost five times in a row after it was established (paired with code 13, Flame Lost After Established), the main limit staying open more than 150 seconds so the control declares a dead blower, a water-sensed condition repeating several times, an internal control fault (code 93) holding the board in soft lockout, or an unexpected flame with the gas valve off (code 14, Flame Present with Gas Valve Off). Because so many roots lead here, code 10 almost always appears alternating on the dual 7-segment display with the code that actually tripped it.

During the lockout, cooling and the blower fan still operate normally — only gas heat is disabled. The lockout clears automatically after one hour and the furnace runs the full ignition sequence again. If the underlying fault is still present, it simply relocks and posts code 10 again.

Because code 10 is a symptom of another fault rather than something you clear on its own, there is no homeowner DIY for code 10 itself. The right approach is to read the companion code shown with it and address that. This model treats a recurring code 10 as a professional-diagnosis fault.

What You'll Notice

• The furnace produces no heat for about an hour, then attempts to start again on its own
• The IFC display alternates 10 with another code (commonly 11, 13, 14, 59, 61, or 93) that identifies what tripped the lockout
• Cooling and the fan still run normally while gas heat is disabled
• You hear the furnace run part of its startup sequence and then go quiet, repeating over several cycles before it finally locks out
• The house slowly cools during the one-hour lockout window even though the thermostat is calling for heat

Common Causes

How This Is Diagnosed

A technician first reads the code that alternates with 10, because that companion code names the real fault. Repeated code 11 points to ignition (flame sensor, igniter, gas supply); repeated code 13 points to flame loss after lighting; code 14 or 93 points to a gas-valve or control problem; a dead-blower path points to the main limit and blower motor. They then review the IFC fault history buffer to see how often and in what order the fault repeated, and confirm whether the lockout self-cleared and immediately relatched. From there they isolate the specific component named by the companion code rather than treating code 10 in isolation.

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 keeps returning to the one-hour lockout after each automatic retry
• Code 10 alternates with 14 or 93, which point to a gas-valve or control-board problem
• Code 10 alternates with a blower or limit fault such as 61, indicating the control declared a dead blower
• The lockout recurs even after simple homeowner checks (clean filter, open gas valve, clear vents) have been done
• You cannot tell which companion code is being shown or what it means

✓ Verified against manufacturer service manual — March 2026