Today I came to Tina’s Marlborough home to perform the annual family plan furnace service. Clearview installed the furnace, humidifier, and water heater almost 18 year ago. Furnace service: Upon tune up and inspection of the 18 year old system I tested and adjusted the gas valve, burners, gas pressure and temperature rise. Pulled and cleaned the flame sensor. Tested ignition system, inducing motor and assembly, blower motor and assembly, heat exchanger, humidifier, static pressures, tested and tightened all electrical connections, all safety switches and control board. The furnace is in good condition. All components are working well within manufacturers specifications. The thermostat was not turning on. I found a connection point in the thermostat wire that has a loose connection. I tightened the connection and the thermostat worked again. I found a short in the humidifier wire that was causing it not to work. I moved it away from the duct work and the humidifier is working again.