Good Morning, I hope all are well. It is a toasty 100 plus this week in South Texas. We did our Paul Newman A/C modification and have been extremely Thankful!  Huge difference!   However, we have our AC / heat pump rolling over to die. Perfect timing of course! LOL We have a 2014 Redwood 38gk.  Our Back A/C  with heat pump is the 48004-969 Coleman Mach 15.  Our front A/C only is a Coleman 48254-969 and looks like it won't last much longer either. Any recommendations on changing and or upgrading the Coleman Mach units? We have a regular AC in the front and a heat pump in the rear. Stay with Coleman?  Something else?  Any extra parts we will need to change out?  Tips and Tricks?Where to order from?  Warranty? Thoughts? Thanks