Our furnace stopped working on one of the coldest days of the year 1/31//19, minus 18 degrees. The furnace shut off during the night and it was 55 degrees in our house. I called called at 6:30am and the dispatcher said she would relay the call to a technician. Our guy called at 7:50 saying he was on his way. Our technician determined it was a pressure switch, replaced it, and heat started coming out. Comfort Control saved the day in extreamly cold weather. Thank you.