If you’ve read gas furnace reviews on this site, you know that most furnaces come with a lifetime limited heat exchanger warranty. Heat exchangers are crafted.HomeAdvisor’s Furnace Cost Guide lists pricesociated with installing or replacing a furnace including labor and materials, as reported by HomeAdvisor customers..Comments Responses to “Can You Repair aed Heat Exchanger on a Gas Furnace? It is Worth the Cost?”.Home Advisor’s Furnace Repair Cost Guide provides estimated repair costs for home heaters and their parts, including heat exchanger, blower motor, igniter and flame sensor repairs..
Jump to Gas Furnaces Gas Furnaces $, to $,. Natural gas furnaces often cost a bit more than electric, and unless you re replacing an existing unit, they come with the added expense of putting in gas lines from the street and building extensive ductwork..