A. O. Smith Error E10 / 10: Abnormal Combustion / Low Water Flow
On numeric models, code 10/101 indicates abnormal combustion (air/exhaust problem); A.O. Smith documentation also uses E10 for low water flow below the activation threshold (~0.4 GPM). Both indicate the unit cannot run a safe heating cycle. We diagnose and repair it across Greater Vancouver — same-day and after-hours.
On numeric models, code 10/101 indicates abnormal combustion (air/exhaust problem); A.O. Smith documentation also uses E10 for low water flow below the activation threshold (~0.4 GPM). Both indicate the unit cannot run a safe heating cycle.
A. O. Smith fault codes can vary by model and series. Use this as a guide — the same code can have more than one cause. Our Technical Safety BC–licensed technicians read the code, confirm it against your unit's manual, and diagnose the true cause before any repair.
Likely causes of A. O. Smith error E10 / 10
- Blocked or improperly separated intake/exhaust venting
- Dirty fan motor or burner causing poor combustion
- Clogged inlet water filter or low supply flow
- Partially closed water valve or low fixture flow
- Restricted air intake
What you can safely check
- Inspect the outdoor intake/exhaust terminals for blockage
- Confirm hot and cold valves to the unit are fully open and fixtures have normal flow
Beyond these checks, do not open the unit or touch gas/electrical parts — BC law requires a licensed gas fitter. Call us for a proper diagnosis.
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Parts often behind A. O. Smith error E10 / 10
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A. O. Smith Error E10 / 10 Repair Across Metro Vancouver
Related A. O. Smith Venting & Combustion Codes
Frequently Asked Questions
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