As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT SIDE WINDOW HEAT "OVERHEAT" ILLUMINATED AT THE GATE A FEW MINUTES AFTER WINDOW HEAT TURNED ON. OUTSIDE AIR TEMP WAS 57DEF F AND CLOUDY SKIES. ACFT GROUNDED. FOUND HIGH RESTIANCE BETWEEN C&D, PRIMARY TAPS, SPARE SENSOR OK. SWAPPED TAPS TO SPARE SENSOR REF WDM 30-41-12. OPS CK OK. REF MM 30-41-11-710-801, VERIFIED RESISTANCE FOR H15 WINDOW IS 65 OHMS & IS TAPPED TO TERMINAL 2 ON TB5016.