One of the disadvantages includes a high replacement cost if something happens to the motor or controls. Furthermore, ECM variable-speed motors need the attention of a qualified HVAC technician if something goes wrong as special diagnostic tools are required to diagnose any problems which may arise...
ECM Blower Motors Types Each manufacturer will program the ECM depending on what the motor will be used for. Motors can be programmed to maintain torque, airflow, or speed. Constant Torque ECM A constant torque ECM is programmed to maintain the same amount of torque regardless of the static ...
Replacement Issues Insert Blower motor as far into cradle as possible air over motor helps keep motor cool Verify proper installation of motor to prevent water entering pin connections Drip legs, proper positioning Beware of electronic thermostats (90% furnaces) units that notch the waveforms “Power...