To all who have posted on ECM motors I say thank you. My 4 ton package unit has a HD52AE123 motor and the module has failed 3 times in 6 years. The unit is 11 or 12 years old. The return air duct is 10" in diameter and about 50 feet long. So why didn't the module fail sooner? Go figure. The motor is o.k. but the plastic connector is burnt. Where can I get a replacement connector? Or two? Or three?