Condenser Fan Motor
PSC and ECM outdoor fan motors.
AC Breaker Keeps Tripping: How to Find Out Why
How to diagnose an air conditioner or heat pump that keeps tripping its breaker: a grounded compressor, a locked rotor, a shorted fan motor, wiring faults, high head pressure or a weak breaker.
Heat Pump Defrost: How It Works and How to Troubleshoot It
How heat pump defrost works on time-temperature and demand defrost boards, what's normal during defrost, and how to diagnose a heat pump that ices up or defrosts too often.
How to Clean an AC Condenser Coil the Right Way
How to clean a condenser coil without damaging it, which cleaners to use on copper-aluminum vs. all-aluminum coils, how to tell when it's dirty, and what a dirty coil does to pressures.
Replacing a Run Capacitor or Contactor: How to Pick the Right Part
How to choose a replacement run capacitor (µF, voltage, dual vs. single, size) and contactor (coil voltage, poles, amp rating), with the common mistakes that bring callbacks.
AC Not Cooling? A Step-by-Step Diagnostic Checklist for Techs
Work an AC no-cool call in the right order, from the thermostat call to airflow, electrical and refrigerant charge, without guessing.
Condenser Fan Not Spinning: Capacitor, Motor or Control?
Find out why an outdoor condenser fan won't run, from the fan capacitor and seized bearings to the contactor, wiring and heat pump defrost.