Miele Dryer Error Code F45

Miele Dryer Error Code F45

Error code F45 indicates a heat exchanger or moisture detection system malfunction on your Miele dryer. This error prevents the dryer from operating safely until the issue is resolved.

Symptoms

• Dryer will not start or stops mid-cycle when F45 error appears
• Display screen shows "F45" error code
• Clothes are not drying properly even after extended cycles
• Dryer makes unusual sounds or operates inconsistently
• Moisture sensor may not be detecting wet clothes correctly
• Dryer gets excessively hot or does not heat adequately

Possible Causes

• Clogged or obstructed heat exchanger restricting airflow
• Lint accumulation in the ventilation system or dryer duct
• Blocked external dryer vent preventing proper exhaust
• Faulty moisture sensor unable to detect humidity levels
• Restricted air intake vents on the dryer cabinet
• Malfunctioning thermal sensor affecting temperature regulation
• Dryer vent ductwork installed improperly or with excessive bends
• Inadequate clearance around dryer preventing proper ventilation
• Electrical connection issues with 240V supply to heating element

Safe Checks You Can Do

• Verify the dryer's 240V circuit breaker in your electrical panel is in the ON position; if tripped, reset it by switching OFF then back ON
• Unplug the dryer or turn off its dedicated circuit breaker for 60 seconds, then restore power to perform a complete system reset
• Remove and thoroughly clean the lint filter before each load, ensuring no lint debris remains
• Inspect the external dryer vent hood outside your home to confirm it opens freely and is not blocked by lint, debris, or ice
• Check the dryer vent ductwork for visible kinks, crushing, or blockages; straighten any bent sections if accessible
• Ensure the dryer door closes completely and latches securely; listen for the audible click
• Verify adequate clearance around your dryer (minimum 1 inch on sides and back) to allow proper ventilation
• Do not overload the dryer; fill it only three-quarters full to allow hot air circulation
• Confirm the dryer intake vents on the front or sides are clear of lint and not blocked
• Check that your dryer vent duct is not longer than manufacturer recommendations (typically 25 feet maximum)
• Ensure the vent ductwork is rigid or semi-rigid, not flexible plastic, which can sag and trap lint

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