A. O. Smith Error 1 Flash: Ignition Failure
The control failed to establish ignition. On power-vent ProLine models the heating LED flashes once (repeating) to signal the burner did not light after the trial-for-ignition sequence. We diagnose and repair it across Greater Vancouver — same-day and after-hours.
The control failed to establish ignition. On power-vent ProLine models the heating LED flashes once (repeating) to signal the burner did not light after the trial-for-ignition sequence.
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 1 Flash
- No or insufficient gas supply to the burner
- Failed or weak igniter / hot surface igniter
- Igniter wiring or ground fault
- Blocked or fouled pilot/burner orifice
- Gas valve not opening
What you can safely check
- Confirm the gas supply valve to the heater is fully open
- Confirm other gas appliances in the home are working (rules out a gas-supply outage)
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.
Parts Are Professionally Installed — Not Sold for DIY
For your safety and to keep your manufacturer warranty valid, BoilerPart.ca does not sell loose boiler parts over the counter or for self-installation. Under BC regulations, gas appliance components must be installed by a licensed gas fitter. Every part we source is genuine OEM and is professionally fitted, tested, and certified by our Technical Safety BC–licensed technicians as part of a complete repair or installation.
Parts often behind A. O. Smith error 1 Flash
Genuine A. O. Smith parts we supply and professionally install — never for DIY.
Our Guarantees & Warranties
Every repair and installation is backed by genuine parts, licensed workmanship, and a promise to make it right.
Workmanship Guarantee
Every repair and installation is backed by our written workmanship guarantee. If a part we installed fails because of our work, we make it right.
Genuine OEM Parts
We fit only manufacturer-original (OEM) components so your boiler performs to spec and keeps its factory warranty intact.
Manufacturer Warranty Honoured
As an authorised service provider for the brands we work on, our installs preserve and register your manufacturer parts warranty.
Licensed & Insured
All work is completed by Technical Safety BC–licensed gas fitters (Licence LGA0043870, Boiler Permit LBP0046450). We are fully licensed, bonded and insured for your protection.
Up-Front Pricing
You approve the diagnosis and quote before any work begins. No hidden fees and no surprise charges.
Satisfaction Commitment
Backed by the full HVAC resources of CanroHeat.ca and four decades of service in Greater Vancouver since 1985.
A. O. Smith Error 1 Flash Repair Across Metro Vancouver
Related A. O. Smith Ignition & Flame Codes
Frequently Asked Questions
Fix A. O. Smith Error 1 Flash Today
Licensed A. O. Smith diagnosis and repair with genuine parts — same-day and after-hours across Greater Vancouver.
A Division of CanroHeat.ca · Licensed Gas Fitters · Serving Greater Vancouver since 1985