The gas valve of my Trane XV90 furnace needs to be replaced, the technician from a local heating company says he will charge $525 for the parts of replacing the gas valve, but I searched through the web and found it only costs $150 for the similar gas valve.
Can you guys let me know what should I do? Should I but it online somewhere and is there any service that only does the installation for me? Any help is greatly appreciated.
Thanks!