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Crew of technicians will calibrate thermostat, lubricate all moving parts, clean 1" air filter, and inspect heat exchanger, fan control, furnace safety controls, gas valve operation, ignition system, electrical connections, gas pressure, back-up heat elements, and temperature differentialService will also include a check for gas leaks, refrigerant level, and carbon monoxideFamily-operated business was founded in 1986Service area includes North Dallas, Plano, Carrollton, McKinney, Addison, Frisco, and Lewisville Want more? Check out All Service Heating & Air's website.