What Happens During a Kitchen Exhaust Fan Service—And Why It Matters

Your commercial kitchen’s exhaust fan works hard behind the scenes—pulling smoke, heat, grease-laden air, and odors up and out of your space. But like any mechanical system, it needs regular maintenance to keep performing safely and effectively. At Flue Steam, we know that a failing exhaust fan doesn’t just slow down ventilation—it can become a major fire hazard, a compliance issue, and a threat to your entire operation.

If it’s been a while since your last fan check, here’s what professional kitchen exhaust fan service includes and why it’s essential for fire safety, ventilation, and performance.

Why Exhaust Fans Need Regular Maintenance

Exhaust fans are critical components of any commercial kitchen ventilation system. When properly maintained, they:

• Remove hot, greasy air from the kitchen
• Balance air pressure with make-up systems like swamp coolers
• Reduce smoke and odors
• Minimize grease accumulation in hoods and ductwork
• Protect against fire by venting hazardous vapors

When neglected, however, they can:

• Overheat or fail due to clogged blades and motors
• Reduce airflow, allowing heat and contaminants to build up
• Spread grease deposits through ducts, increasing fire risk
• Trip circuit breakers or cause electrical problems
• Lead to failed inspections or code violations

What’s Included in a Professional Fan Service

At Flue Steam, our fan maintenance service is comprehensive and customized to each kitchen’s needs. Here’s what our technicians typically perform during an exhaust fan service:

1. Visual Inspection

We begin with a full inspection of the fan, including mounting hardware, wiring, and vibration levels. Loose or worn components can cause premature failure or dangerous mechanical problems.

2. Grease Removal

Grease buildup on the fan blades is not only a fire risk—it also reduces fan efficiency. We remove all grease and debris from blades, housing, and surrounding areas using safe, effective cleaning solutions.

3. Belt & Motor Check

Most exhaust fans operate using belt-driven motors. We check the condition of belts, tighten tension if needed, and replace any that show signs of wear. We also test the motor for performance, overheating, or unusual noise.

4. Lubrication

Where applicable, we lubricate bearings and moving parts to ensure smooth operation and reduce wear over time.

5. Secure and Seal

We make sure the fan is properly mounted and sealed to the ductwork to prevent vibration, leaks, or safety hazards. We also verify that the backdraft damper is functional.

6. Performance Testing

Once cleaned and serviced, we power up the system and test airflow to ensure the fan is operating at full capacity. We can also check that airflow is balanced with your make-up air system for safe, efficient operation.

7. Documentation and Compliance

You’ll receive a full report of what was serviced, cleaned, or replaced—ideal for keeping on hand for health and fire code inspections.

Signs Your Exhaust Fan Needs Service

Even if it’s running, your exhaust fan may be signaling trouble. Watch for:

• Unusual noise or vibration
• Reduced airflow or lingering smoke
• Overheating or a burnt smell
• Oil or grease dripping from the housing
• Fan motor failure or frequent circuit breaker trips

Any of these issues could mean it’s time for a professional inspection.

Bundle Fan Maintenance with Your Next Cleaning

Many of our clients schedule fan service alongside their regular exhaust system cleaning. That’s a smart move—it minimizes downtime, keeps your kitchen compliant, and ensures the entire ventilation system is running smoothly from hood to duct to fan.

Stay Ahead of Trouble—Schedule Fan Service Today

Don’t wait until your exhaust fan stops working or a fire inspector flags a violation. Call Flue Steam at 800-700-FLUE today to schedule professional fan service for your commercial kitchen. We’ll help you keep the air moving, the grease under control, and your kitchen safe, clean, and code-compliant.