I have a 2015 Bounder 33C and the show is either cold or hot nothing in between. I ordered a replacement on the internet same quality. Who makes a quality mixing valve for RV's?
The hot/cold when you re-start after cut off is because of some laws of physics I really do not care to get into here. they also eplain why it will be a cold blast one time and hot the net.
The solution is do not FULLY cut off flow,, Let it dribble a bit.. This is how Oygenics does it with their "Smart Pulse" cut off valve.
But and even better solution is the valves I linked to in my last post.