Most modern residential furnaces do not use a traditional standing pilot light, as they feature electronic hot surface igniters or intermittent electronic spark ignition systems. However, if you have an older standing pilot system and need to replace the associated pilot assembly or thermocouple—which is the safety device that keeps the pilot valve open—the cost is typically very affordable. Parts alone usually cost between twenty and fifty dollars, while professional service call and labor fees bring the total cost to replace a thermocouple or pilot assembly to between one hundred and two hundred and fifty dollars. If the entire gas control valve or multi-component pilot safety system needs replacement, costs can range from three hundred to six hundred dollars. You can verify the repair when the pilot flame stays lit and maintains proper burner ignition.
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