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The Leading Edge of Maintenance | Plumbing - Wax Ring

Learn how to replace a toilet’s wax ring, including removing the toilet, scraping the old wax, installing new closet bolts, properly seating the new wax ring, sealing, tightening bolts, and checking for leaks. Also covers optional tank component...

The Leading Edge of Maintenance | HVAC - Contactors

Learn how contactors in HVAC systems use a 24-volt coil to control power flow, how they operate to supply 240 volts to compressors and fan motors, and common failure causes like obstructions or arcing. Understand how sealed contactors protect against...

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.