Whirlpool Dryer Error Code CLn

CLn is an overheat warning that appears when airflow through the dryer's exhaust system is restricted. Reduced airflow causes heat to build up inside the drum and exhaust path beyond safe operating levels. The code can be triggered by a clogged lint screen, a blocked or non-compliant exhaust duct, or a plugged exterior vent cap. It is an early warning that must be addressed before it escalates to a fatal E:12 error.

You should stop using the dryer until the airflow restriction is corrected. Running the dryer in an overheated condition is a fire hazard, as lint is highly flammable and excess heat can ignite accumulated lint inside the duct or around the exhaust system. Continued use will also cause the warning to escalate to a fatal E:12 error that disables the dryer entirely.

If the cause is simply a clogged lint screen or vent cap, the fix costs nothing beyond your time. Hiring a professional dryer vent cleaning service typically runs between $80 and $175 depending on duct length and accessibility. If the ductwork needs to be replaced or reconfigured to meet specifications, materials and labor can range from $100 to $300 or more depending on the complexity of the installation.

Start by cleaning the lint screen thoroughly, then inspect and clean the entire exhaust duct from the back of the dryer to the exterior vent cap. Check that the duct run does not exceed the maximum length or number of turns allowed by your user manual. Once airflow is fully restored, the CLn warning should clear on the next cycle.

Resetting the dryer may temporarily clear the CLn display, but the code will return as soon as the dryer runs another cycle if the underlying airflow restriction has not been fixed. The only way to permanently resolve CLn is to clean the lint screen, clear the exhaust duct, and confirm the duct installation meets the specifications in the user manual.