As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB-OUT OF DTW RIGHT ENGINE INTAKE LIGHT CYCLED ON/OFF APPROXIMATELY EVERY 20 SECONDS. QRH COMPLETED. AIR RETURN TO DTW. MAINTENANCE FOUND NR 1 THERMISTOR OHM CHECK BAD IAW MM REPOSITIONED NR 1 THERMISTOR TO NR 4 POSITION. OPS CHECK OF RT INTAKE HEAT SYSTEM IAW MM ALL GOOD.