HVACR technicians have traditionally swapped out customers’ faulty blower motors with like motors, and, more often than not, those motors have been single-speed permanent split capacitor (PSC) units.
But, over the years, several manufacturers have developed variable-speed electronically commutated motors (ECMs) specifically designed as retrofit replacements for faulty PSC motors. And, while not all contractors consistently offer ECMs, those who do often report increased profits as well as improved customer comfort and satisfaction.