Ventilation Hood Medium Severity
LED-PERF Miele Error Code

Reduced Extraction Performance

The LED-PERF error code on your Miele Ventilation Hood indicates reduced extraction performance. This is a Medium severity issue. The ventilation hood is experiencing reduced extraction performance. Cooking fumes, steam, and odors are not being cleared as effectively as before. This can be caused by filter issues, ductwork problems, fan degradation, or a combination of […]

~70%

DIY Fixable

From $0 (filters/cleaning)

Typical Repair Cost

15 min – 1 hr

Pro Repair Time

Quick Assessment

Answer to continue safely

Is it safe to keep using?

Yes. The hood operates safely but at reduced effectiveness. Clean filters and check the duct path for obstructions.

Can I reset the code?

No. Performance issues are physical — filters, ducts, or motor. No electronic reset applies.

When to stop immediately?

Stop if you notice: Performance does not improve after cleaning all filters and checking ducts, Motor makes unusual noise.

Symptoms You May Notice

Cooking odors linger

Smells from cooking persist long after the hood has been running.

Steam escapes past the hood

Visible steam rises past the hood canopy instead of being captured.

Grease deposits on walls/cabinets

Grease accumulates on surfaces near the cooktop despite hood use.

Fan seems weaker than before

The same fan speed produces noticeably less airflow.

Possible Causes

1

Clogged grease filter

A heavily saturated grease filter blocks most of the airflow.

DIY Possible
2

Saturated charcoal filter (recirculation hoods)

The charcoal filter has reached end of life and can no longer absorb odors.

DIY Possible
3

Blocked external vent

The wall or roof outlet is blocked by debris, bird nest, or a stuck non-return flap.

DIY Possible
4

Duct run too long or restrictive

Excessive duct length or too many bends reduce airflow below effective levels.

Requires Professional
5

Motor losing power

The fan motor or its capacitor is degrading, reducing RPM and airflow.

Requires Professional

Safe Checks You Can Do

These checks are safe for homeowners. No disassembly required. Do not remove panels or access internal components.
  1. 1

    Clean grease filters

    Remove all grease filters and clean them in the dishwasher. Reinstall when dry.

    Hold a piece of paper near the hood intake with the fan on — it should be sucked firmly against the hood.

  2. 2

    Replace charcoal filter (if recirculation)

    Replace the charcoal/carbon filter. Even if the indicator hasn't triggered, the filter may be saturated.

    Charcoal filters last 6–12 months depending on cooking frequency.

  3. 3

    Check external outlet

    Go outside and check the wall/roof vent. Ensure the flap opens when the hood runs. Clear any debris.

    Have someone turn the hood to maximum while you check from outside — the flap should open fully.

  4. 4

    Compare fan speeds

    Run the hood at each speed. If maximum speed sounds the same as medium, the motor may be losing power.

    A noticeable speed difference between settings is normal. If all speeds sound similar, the motor needs attention.

When to Call a Professional

Contact a qualified Miele technician if:

  • Motor capacitor failing (fan slowing down)
  • Duct design needs professional assessment
  • Motor replacement needed

Need Professional Help?

Find qualified Miele technicians in your area for proper diagnostics and repair.

Ventilation Hood Repair Service Schedule Appointment

More Ventilation Hood Error Codes

View all codes →
LED-WIFI LED-NOISE LED-LIGHT LED-FAN LED-NR LED-CF LED-GF