Hello To All From Rossville Tn! Hope everyone is having a great new year! Got a question on this unit? Unit will only run at a close to wide open speed . Replaced variable speed switch still have same issue. Dealer that installed unit originally claims the switch is the only thing that can cause this . Unit was installed in 2012. As many of you already know quadra fire will not speak to you on a technical issue unless you are a dealer.🤨God Bless And Take Care! 901-326-6779 hope thats ok to share on here !