Error Code D90
If you see a d90 or d95 error on your control panel, your dryer has detected a 90% or 95% blockage in the duct work, prompting immediate attention. Blockages and restrictions in your home exhaust system possibly caused by lint buildup and debris, can prevent your dryer from running efficiently at maximum performance.
To remove the D90 error code and get your dryer working again, you need to clean out the ventilation system. Once you give it a good clean, airflow will increase, and the error code will go away.