What It Means
One-hour soft lockout following repeated ignition or safety faults.
Rheem Furnace
Rheem Furnace Error Code 10
Troubleshooting guide for the Rheem Furnace system fault 10.
Possible Causes
- Repeated ignition failures.
- Repeated flame loss.
- Unexpected flame detected.
- Dead blower condition.
Not sure which one it is — or if it's none of these? Try ACLogics today.
Disclaimer: This information is for general reference. Error codes can vary by model and production year. Always refer to your machine's specific manual and the information printed on the unit itself.
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Full Diagnosis
One-hour soft lockout.
All Recorded Causes
Ignition failed repeatedly, flame was lost repeatedly, unexpected flame was detected, a dead blower condition occurred, or another critical fault triggered soft lockout. Correct the underlying fault before resetting.
Verify Before Replacing Parts
- Confirm the exact Rheem model family and furnaces context before acting on a generic code description.
- Walk the entire heating sequence in order instead of jumping straight to the reported code, watching for ignition failed repeatedly, flame was lost repeatedly, unexpected flame was detected, a de….
- Verify each safety device and prove where the sequence stops under live operation, including whether correct the underlying fault before resetting.
- After the correction, run the system long enough to confirm the furnaces fault does not return under normal load.
Still unsure about this fault?
ACLogics walks you through Rheem Furnace diagnostics step-by-step — so you confirm the cause before swapping parts.
