As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT SIDE WINDOW OVERHEAT CAUTION LIGHT ILLUMINATED. FOLLOWED QRH PROCEDURE AND LIGHT ILLUMINATED AGAIN WHEN TURNED BACK ON. GROUNDED - YES. UPON ARRIVAL TO A/C OBSEERVED LEFT SIDE WINDOW ON AND GREEN. ACCOMPLISHED BITE OF WHCU FOR LEFT SIDE, BIT IS GREEN PASS, FAULT HISTORY LOGGED SEVERAL SENSOR FAULTS, ACCOMPLISHED TEST OF WINDOW HEAT REF B737-900 AMM 30-41-41 OPS CKD NML.