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The Leading Edge of Maintenance | HVAC - Outside Unit

Covers how to check if an HVAC outdoor unit is working properly. Learn how to verify power at the contactor, test compressor and fan motor activation, and use a jumper wire to diagnose issues with the thermostat or control wiring

The Leading Edge of Maintenance | HVAC - Straight A/C Unit

Walks through how a straight AC system functions, including how the thermostat controls key components like the fan relay, contactor, compressor, and blower. Explains how AC and heat modes differ in operation and which parts activate in each.