American Reidential Services in Denver area did a furnace service at my house Monday. They said the furnacce was overheating/cycling off because of a big crack in the heat exchanger and carbon monixide was at dangerous levels.
My furnace was condemned. They gave me a bid of $3862 to replace it. Since I've been unemployed the last 3 years, I decided before signing the contract to look for financing. I found out about the county weatherization program that might pay for a new furnace.
The contractor they sent to test my furnace told me the furnace was cyling off because theair filter was chokin the air supply - not because of a crack. He said the carbon monoxide levels ARS got me scared about was less than what a cigarette generates - there ws no carbon monoxide danger in my house! The $3800 bid for a new furnace wasalso $1000 too high! So, ALWAYS GET A 2ND OPINION BEFORE SIGNING A CONTRACT.
If you're low income, you might qalify for a federal weatherization program to get free insulation or furnace repair.
DON"T USE ARS even though thy're the vendor of choice via Home Depot. They're crooks!!!