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Added Build a substitute Capacitor and the My van inventory.
Test run, dual & start capacitors: amps & volts or µF meter, instant pass/fail
A quick, free capacitor tester for HVAC techs. Check run, dual and start capacitors in seconds and get a clear pass or fail. - Amps & volts method: test the capacitor with the unit running. Enter the amps on the capacitor wire and the volts across it, and the app calculates the actual µF (the 2,652 × amps ÷ volts rule, done for you) - µF meter method: enter your meter reading - Dual run capacitors: check the HERM and FAN sides separately - Start capacitors: check against the range printed on the label - ±5%, ±6% or ±10% tolerance, 60 Hz or 50 Hz - Shows the good range and how far off the capacitor is - Step-by-step test instructions built in - Works offline. No ads, no account, no data collected Safety: capacitors store a charge. Discharge before handling, and work on live equipment only if you are trained to. Want to see capacitor and motor troubleshooting on real service calls? Tap the YouTube link in the app to watch Dallas Cool Air's videos. Made by Dallas Cool Air Corp., Red Oak, Texas.