Our Coleman heat pump is getting weak. We want to replace it with a Coleman Mach 15 heat pump. Online the heat pump price varies from $800 to $1,700. Camping world says we have to buy a new control board and another RV dealership said we do not need to change this out. The online stores do not say if their unit comes with the control box. Has anyone ordered one of these units online? If so, could you please share your experience. Thanks