A waste of my time and money. They initially charged me $80 and told me it was a censor on my furnace. The next day, the furnace still wasn't working. Then I was told that it was getting too much gas so they turned it down, still not working. Then they said it was going to cost me another $160 to $220 plus tax for more work. Thank gawd I didn't. I ended up calling TLC and they came out and told me it was my filter, it needed to be changed out and only charged me $105. Lesson learned, CALL A PROFESSIONAL!!