As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 4684, CREW REPORTED A ACRID SMELL IN COCKPIT ON APPROACH TURNED OFF WINDSHIELD HEAT 1 AND 2 SMELL DISSIPATED. AIRCRAFT REMOVED FROM SERVICE. REMOVED AND REPLACED FO'S WINDSHIELD TEMP CONTROLLER IAW EMB 135 AMM 30-42-01. OPERATION CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.