Bonfe’s Plumbing Heating & Air Service

Since I live in Stillwater, I assume the technician was dispatched from this location, but not sure.
On Thursday, I had my furnace inspected utilizing a Groupon 50% off coupon. The technician told my friend who let him in the heat exchanger was cracked and the furnace needed to be replaced. He then turned off the gas to the furnace and disconnected a tube to keep it from being turning on and running again. He left an estimate for 5 different types of furnaces, ranging from $ 3,886 to $ 7,129.
I had another company come out today. Do to the age of the furnace they suggested trying to repair, not replace. I watched as he took the burners out and used a scope to visually inspect the heat exchanger. He found nothing wrong. After it was put back together he used a carbon monoxide probe to monitor the gas output, it ranged from 13 — 15 parts per million. I was told it is safe upto 100 ppm.
Makes one wonder.