package ac not work how check contactor Coil relay thermostat transformers 24V power

This video making for learning ac repairing work for new technician and for helping
about this video this video in learn carrier package unit not work how check control wiring thermostat power 24 volts and compressor heater faulty kaise check kare very good video for learning full video watch open this link watch https://youtu.be/0-KBKQ_FNq8