Weil-McLain Blower Fault: Combustion-Blower Fault
What the Weil-McLain Blower Fault fault means, what causes it, and why it's a job for a licensed BC gas technician — not a DIY reset.
Severity
High — needs prompt professional attention
Gas safety first
This fault involves gas, combustion or venting. If you smell gas (rotten-egg odour), hear hissing, or feel unwell, leave the building immediately and call 911 or FortisBC at 1-800-663-9911 from outside. Do not flip switches or relight anything. For all other cases, switch the boiler off and call a licensed gas technician.
What the Weil-McLain Blower Fault fault means
The combustion blower is not running correctly, so safe airflow cannot be proven.
On Weil-McLain ECO, ECO Tec, Ultra and Evergreen series, Blower Fault is a combustion-fan fault. It is a protective response — the boiler is telling you something needs attention, and the safe, lasting fix is a proper diagnosis rather than repeated resets.
Symptoms you may notice
- No heat or hot water
- Boiler will not begin its ignition sequence
- Unusual fan noise or no fan sound at all
Common causes of Weil-McLain Blower Fault
Why this is not a DIY fix
The combustion fan controls the air–gas ratio. A fan or fan-speed-feedback fault means the boiler cannot prove safe airflow, so it (correctly) refuses to fire. Replacing and re-commissioning the fan involves combustion verification — licensed gas work.
In British Columbia, gas work must be performed by a TSBC-licensed gas fitter. GasBoilers.ca — a CanroHeat division — sends Red Seal–certified, gas-licensed technicians who diagnose the true cause, repair it correctly, and verify safe operation before they leave.
How our technicians diagnose & repair it
- 1Test fan power, speed feedback (Hall sensor) and wiring
- 2Inspect the fan and venturi for debris, dust or seized bearings
- 3Check the control board fan-drive output
- 4Replace the fan if needed and re-run combustion analysis
Related Weil-McLain codes
Weil-McLain Blower Fault — FAQ
What does the Weil-McLain Blower Fault fault mean?
The combustion blower is not running correctly, so safe airflow cannot be proven. On Weil-McLain ECO, ECO Tec, Ultra and Evergreen series, this is categorised as a combustion-fan fault.
What causes Weil-McLain Blower Fault?
The most common causes are: Failing blower motor; Feedback fault; Debris; Wiring. A licensed technician confirms which one applies before any part is replaced.
Can I fix Weil-McLain Blower Fault myself?
No. The combustion fan controls the air–gas ratio. A fan or fan-speed-feedback fault means the boiler cannot prove safe airflow, so it (correctly) refuses to fire. Replacing and re-commissioning the fan involves combustion verification — licensed gas work. Repeatedly resetting the boiler without fixing the root cause can be unsafe and can cause further damage. Call GasBoilers.ca at 604-359-1081 for a licensed diagnosis.
Is the Weil-McLain Blower Fault fault dangerous?
It can be. This fault involves combustion, gas or venting. If you ever smell gas, leave the building immediately and call 911 or FortisBC at 1-800-663-9911 from outside. Otherwise, switch the boiler off and book a licensed technician.
How much does it cost to fix Weil-McLain Blower Fault in Greater Vancouver?
Cost depends on the root cause and any parts needed. We start with a flat-rate diagnostic, then quote the repair before any work begins — no surprises. Call 604-359-1081 for current pricing and same-day availability.
Look up another brand's error codes
Weil-McLain showing Blower Fault? We'll fix it right.
Licensed, Red Seal–certified gas technicians across Greater Vancouver. Upfront pricing, same-day service available.