One problem related to defogger heater has been reported for the 2003 Ford Explorer. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Ford Explorer based on all problems reported for the 2003 Explorer.
Temperature blend door starts making a clicking noise and then the heater starts putting out cold air. The front window doesn't defrost. No heat in the front of the vehicle when temperatures outside can reach 0 degrees. The average cost to repair the part is $734.