As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WINDOW HEAT OVERHEAT LIGHT COMES ON FOLLOWED QRH WITH NEGATIVE RESULTS. SWITCH IS IN OFF POSITION PER QRH GUIDANCE. CAPTAIN STATED IT WAS THE RT FWD WINDOW. TROUBLESHOOTING CARRIED OUT ON R1 WINDOW OVERHEAT LIGHT, OPS TEST AND BITE TEST CARRIED OUT IAW AMM 30-41-11-710-801, FOUND WHCU, LRU RED LIGHT ON WHCU. SWAPPED POS LT & RT WHCU FOUND FAULT FOLLOWED OVER. DEFER IAW MEL 3041B. REMOVED AND REPLACED WHCU RT IAW AMM 30-41-11. OPS CHKD GOOD. MEL CLEARED.