We had the furnace ducts cleaned yesterday by the 4 Seasons Home Comfort people. $262.50 later, we have clean ducts. But it didn’t do any good at first because a transformer blew apart. How? Something about a faulty ground wire. There is normally a buzzing noise from the furnace (the old transformer did that), but this morning – no buzz, and no heat. Another technician came today to fix it, no charge. Now all is good.