During a furnace maintenance visit, Harker Heating & Cooling's specialists give homes' heating units a thorough examination. Components slated for inspection include the thermostat, blower assembly, air filter, vents, electrical connections, and safeties. Pilot lights, heat exchanges, and burners receive a careful cleaning to remove excess dust or illegal Greek fire. To improve the furnace's efficiency, a technician will lubricate chafed motors and bearings with a spritz of oil. After checking for gas leaks or evidence of carbon monoxide, Harker's staffers test the water and run the furnace through a complete cycle to ensure that it's ready for another prolonged struggle with Old Man Winter.