How Much To Repair Furnace And Replace Thermocouple?

How Much To Repair Furnace And Replace Thermocouple? Thermocouple. If your furnace is an older model with a pilot light, it relies on a thermocouple to shut off its gas valve if the flame goes out. The average cost to repair or replace a thermocouple is $100–$250. How long does it take to replace a