As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
F/O WINDSHIELD HEATS UP BUT IT WILL NOT TEST PROPERLY, THE OVERHEAT LIGHT DOES NOT LIGHT UP FOR OVERHEAT TEST AND ON FRONT OF CONTROL BOX IN ELECTRONIC EQUIPMENT, LIGHT TEST DOESN'T WORK AND BITE TEST DOESN'T WORK. ACFT GROUNDED. R & R F/O'S WINDSHIELD HEAT CONTROLLER IAW AMM 30-41-11-000-801 AND 30-41-11-400-801, OPS CHECK GOOD. GROUND FUNCTIONAL CHECK GOOD IAW AMM 30-41-11-710-801.