As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN ROUTE FROM DCA TO ISP, THE PASSENGER DOOR LIGHT ILLUMINATED. AIRCRAFT DIVERTED INTO ACY AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED AND FOUND THE DOOR SEAL SWITCH AT FAULT. THE SWITCH WAS CLEANED AND ADJUSTED, THE AIRCRAFT WAS PRESSURE TESTED ON THE GROUND AND NO FURTHER FAULTS FOUND. A/C RETURNED TO SERVICE. (M)