Furnace Blower Motor Repair
Expert diagnosis and repair of furnace blower motor failures across Greater Vancouver. Our certified technicians identify and resolve motor issues quickly and correctly.
Blower Motor Diagnostic Process
Proper blower motor diagnosis requires systematic testing of electrical components, mechanical condition, and system integration. Our technicians follow manufacturer procedures to identify the root cause of motor failures.
Our Diagnostic Steps
- Visual Inspection: Check for obvious damage, burnt wiring, or seized components
- Electrical Testing: Measure voltage supply, motor windings, and ground continuity
- Capacitor Load Testing: Verify start and run capacitor microfarad ratings
- Bearing Assessment: Check for excessive play, binding, or noise
- Amp Draw Testing: Measure actual current draw vs. nameplate specifications
- Safety Controls: Test thermal overload protection and limit switches
When Repair Is Possible vs. Replacement
Not all blower motor problems require complete replacement. Some issues can be resolved through component repair or replacement.
Repairable Issues
- • Failed start or run capacitor
- • Dirty or binding blower wheel
- • Loose electrical connections
- • Tripped thermal overload
- • Minor bearing wear (if lubrication ports exist)
- • Bad relay or control board output
Replacement Required
- • Burnt motor windings
- • Seized bearings
- • Physical damage to motor housing
- • Short to ground condition
- • Excessive bearing wear on sealed motors
- • Motor drawing excessive current
Safety Considerations
Blower motor failures can create safety hazards if not addressed properly. Our technicians prioritize safe operation and code compliance.
Critical Safety Checks
- • Verify proper motor grounding to prevent shock hazards
- • Ensure thermal overload protection is functional
- • Check for scorched wiring that indicates overheating
- • Confirm adequate clearances around motor for cooling
- • Test high-limit safety switches that protect against overheating
- • Verify correct fusing or breaker protection
Common Blower Motor Problems We Repair
Motor Hums But Won't Start
Usually indicates a failed start capacitor or seized bearings. We test the capacitor under load and manually check motor rotation. If bearings are seized, motor replacement is required.
Intermittent Operation
Often caused by thermal overload cycling due to poor airflow, failing motor windings, or a weak run capacitor. We diagnose the root cause and address both the motor and any airflow restrictions.
Excessive Noise or Vibration
Grinding, squealing, or rattling indicates worn bearings, loose mounting, or an unbalanced blower wheel. We inspect the entire blower assembly and replace components as needed.
Reduced Airflow
Can be caused by a worn motor running at reduced speed, or a motor on the wrong speed tap. We verify nameplate speed, measure actual RPM, and test under proper static pressure conditions.
Why Choose FurnaceMotor.ca
Certified on all major HVAC brands and motor types
Professional-grade meters and testing equipment
Full WorkSafeBC coverage and trade certification
Serving BC since 1999 through ROMA Heating