Rheem R802VA07542117MSA Error Code A115_F: One-hour Lockout: Gas Valve Stuck Closed
What Does Code A115_F Mean?
Fault code A115_F on the Rheem R802VA indicates a one-hour soft lockout triggered by detection of unexpected voltage on the gas valve circuit. Specifically, the IFC detects that voltage is present on the gas valve connections when the inducer motor has been shut off — a condition that should not occur under normal operation. After the one-hour lockout period, the furnace will attempt to restart automatically.
The gas valve circuit in the R802VA is controlled by a relay on the IFC board. Normally, voltage is only applied to the gas valve during an active heating cycle after all pre-ignition safety checks pass. Detecting voltage when the inducer is off can indicate either a defective gas valve that is generating back-voltage, a control board relay that is not fully releasing, or incorrect wiring that has connected voltage to the gas valve terminal at an unexpected time.
While this code produces a soft (self-clearing) lockout rather than a hard lockout, the root cause involves the gas valve circuit and should be investigated promptly. If the gas valve is stuck or partially energized when it should be off, there is a risk of uncontrolled gas flow.
Common Causes
| Cause | Likelihood | DIY? |
|---|---|---|
| Defective gas valve not responding to electrical signal | Most common | ✗ Call a pro → |
| Wiring issue between control board and gas valve | Common | ✗ Call a pro → |
When to Call a Professional
Contact a licensed HVAC technician if:
- Call a technician — the gas valve and its wiring need professional testing to identify whether the valve or control board relay is at fault
- A technician should measure voltage at the gas valve terminals with the inducer off to confirm the unexpected voltage condition
- If the fault recurs after the lockout clears, the gas valve or control board relay should be replaced before continued furnace operation
✓ Verified against manufacturer service manual — March 2026