I WILLNEVERUSETHEMAGAIN! I had Mitchell’s Aire come out to look at my heater. It took him about 10 minutes to diagnose a bad gas valve. They charged me $ 710.00 to replace it. $ 410.00 for a new valve and $ 263.00 for travel time and 30 min of actual repair time. I found out I could buy the exact same Honeywell gas valve for $ 149.99. They marked up the cost on the parts over 200%. Total Rip offs!