As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
R2 WINDOW HEAT OVERHEAT LIGHT ILLUM ON SHORT FINAL AT NIGHT. GROUNDED - YES. WHCU FAULTS WINDOW SENSOR. SENSOR RESISTANCE NORMAL, WIRING FROM WINDOW TO WHCU NORMAL. FOUND HEAT LEAD ON TRANSFORMER TERM 2, SHOULD BE ON TERM 1 FOR H16 REF B737-800 WDM 30-41-11. RELOCATED HEAT LEAD TO TERM 1. OPS CHECK GOOD PER B737-800 AMM 30-41-00-710-801.