We had issues with hot/cold from the tankless in our 2017 Axis 24.1 and neither Thor or MHSRV could help. It would start out warm and instantly go very cold, over and over. It wasn’t until I read a detailed post here about proper water pressure that we solved the problem. We bought a water pressure regulator and upped the pressure and since we’ve had much better results. Search for that post. It went into a lot of detail and was quite helpful.
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