What's Happening

Temperature sensor has an open circuit. Dryer can't monitor temperature.

How to Fix It

Test thermistor (~10,000 ohms at room temp). Replace if infinite.

Frequently Asked Questions
What does E1 mean on a KitchenAid dryer?
E1 means the thermistor has an open circuit.
How do I test it?
Unplug, find the thermistor on the blower housing, measure resistance. ~10,000 ohms is normal.
How much does it cost?
$10–$25 for the part.