As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLIMBING THROUGH APPROX 25,000' RECEIVED RT FWD WINDOW EICAS MESSAGE AND INOPERATIVE LIGHT ON THE RT FWD WINDOW LIGHT SWITCH. FOLLOWED QRH. LIGHT STAYED ON. RETURNED TO DEPARTURE. ACCOMPLISHED FIM 30-41-00, FIG 104. NO FAULTS NOTED. 1R WINDOW HEATER AND SENSOR RESISTANCE CHECKED OK IAW FIM. REPLACED WINDOW HEAT CONTROL UNIT M192 IAW AMM 30-41-01. OPS CHECKED OK ON GROUND.