The burners lit with steady blue flames on the new valve, and the gas pressure matched the valve’s rated setting.
How much does a furnace gas valve replacement cost?
Bob’s doesn’t publish a single number for gas valves. The price depends on the valve model, whether the furnace needs an exact factory part, where the furnace sits (attic, closet, or garage), and what the pressure and safety checks turn up. Bob’s quotes it on site after testing. Prices vary with the equipment and what testing finds.
How do I know my furnace gas valve is bad?
The common sign is a furnace that goes through its startup, the igniter glows, and the burners never light. Burners that light and then drop out can point to the valve too. A technician confirms it by checking that the control board is sending power to the valve. If the power is there and the valve doesn’t open, the valve is the problem. A dirty flame sensor or a bad igniter can look similar, which is why testing comes first.
Can I replace a gas valve myself?
Leave it to a licensed technician. Every gas connection has to be leak tested, and the outlet pressure has to be set with a manometer. Pressure that’s too high or too low can damage the heat exchanger or make the burners run poorly. A furnace tune-up or regular HVAC maintenance visit includes gas pressure and flame checks like these.
