What was found
LEFT SIDE WINDOW OVERHEAT LIGHT ILLUMINATED ON TAXI OUT. ACCOMPLISHED QRH CHECKLIST & IT OPERATED NORMALLY. ON TAXI-IN THE SAME OVERHEAT LIGHT ILLUMINATED. ACCOMPLISHED QRH CHECK LIST & OVERHEAT LIGHT OUT. ACFT GROUNDED. ACCOMPLISHED WHCU BITE IAW FIM 30-41 TASK 801. NO FAULTS LOGGED. PERFORMED LT SIDE WINDOW HEAT SYS. OPS TEST REF AMM 30-41-00-710-801. TEST PASSED. ACCOMPLISHED FIM 30-41 TASK 809. RESISTANCE BETWEEN PINS A AND B OF WINDOW HEATER WITHIN LIMITS. ALSO, MEASURED RESISTANCE OF SPARE TEMP. SENSOR. WITHIN LIMITS. REF WDM 30-41-12. AS PRECAUTION, R & R WHCU LT SIDE IAW MM 30-41-11-000-801. TEST PASSED.