Today I came to Jim’s Airdrie home because Jase the furnace stopped working earlier today. Jim has explained that the thermostat was showing a communication error. He changed the batteries and the furnace started working. Because I was already coming to the home, Jim decided to have me perform a furnace tune up while I was here. Furnace tune up: Upon tune up and inspection of the 10 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, 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 low speed gas pressure was too high and I adjusted it to 1.9” water column. An e2 error code occurred 1 of the 10 times I fired the system. This indicates a weakening p