A blinking clean light indicates a fault in the heating circuit. This usually a bad heater but sometimes can be from the door not closing properly. Press Heated Dry, Normal, Heated Dry, Normal within 6 seconds. This will reset it and run a diagnostic cycle. If you have an ampmeter, clamp it on a main power wire before running the diagnostics. Look for a 7 amp draw sometime during the cycle. If you don't get a 7 amp reading the heater is not working. If you don't have an ampmeter, just try running another regular cycle, making sure the door is shut tight. If the clean light code comes back, there's still a heating problem. Check for continuity of the heater.
Attached is the tech sheet.