I called them at 8:06 am, they had a tech here by 9:00 am. Fortis gas had replaced my meter a few weeks ago and mentioned my Thermocoupler was not in alignment with the pilot light. This had caused the pilot light to shut off with the slightest draft. They assessed the furnace, and repaired the issues, including cleaning the (reusable) filter, cleaning the partially plugged jets, adjusting the blower unit etc.! Now our ancient gas furnace is working like new again! Thanks Isaac I was expecting a bill over $300 and the bill was under $200.00