Tankless water heater barely works

[Hipomus]

I have a 2024 Transcend Xplor 260RB. The Furrion tankless water heater has been pretty bad, and I'd just assumed that's how it was.

We have to run the water for a while for it to heat, shut off, heat, shut off, heat, shut off, and then stay on for a few minutes before shutting off again for anywhere between 10 seconds and a few minutes. Eventually (15-20 minutes of wasting water in a half-cold shower), it gets consistent. Usually around the time you're done with a miserable shower, but I've let it run for a while to test, and a second shower is usually better(not always)

It happens whether on city or tank water.

After finding this forum and reading about other issues with tankless heaters, it seems that this is not just a normal problem of a crappy system. Other people's problems seem better than the experience I have every time.

What gives? Anyone have an idea of how this might be fixed? The pressure is also pretty bad, and I wonder if it's connected to that.

This is our first RV, so before reading other people's experiences I'd just assumed these systems sucked.

 

[Soundsailor]

It looks like you're new here, welcome to the forum. You could try setting your thermostat to 105 degrees and showering with just hot water. That's what we do and it works great.

 

[redfernclan]

On ours, if you pull the outside cover off, there is a white knob. That controls the flow. Clockwise decreases, counterclockwise increases.

 

[NB Canada]

Is your outside shower valves on and the hot and cold are mixing?

 

[Hipomus]

I have a 2024 Transcend Xplor 260RB. The Furrion tankless water heater has been pretty bad, and I'd just assumed that's how it was.

We have to run the water for a while for it to heat, shut off, heat, shut off, heat, shut off, and then stay on for a few minutes before shutting off again for anywhere between 10 seconds and a few minutes. Eventually (15-20 minutes of wasting water in a half-cold shower), it gets consistent. Usually around the time you're done with a miserable shower, but I've let it run for a while to test, and a second shower is usually better(not always)

It happens whether on city or tank water.

After finding this forum and reading about other issues with tankless heaters, it seems that this is not just a normal problem of a crappy system. Other people's problems seem better than the experience I have every time.

What gives? Anyone have an idea of how this might be fixed? The pressure is also pretty bad, and I wonder if it's connected to that.

This is our first RV, so before reading other people's experiences I'd just assumed these systems sucked.

I guess posting here is all I needed to do to get my brain going. Turns out it was shutting off because there wasn't enough flow, causing it to overheat(I guess). I thought of this, and the first thing I tried was removing the hose and shower head and it worked! After further exploration, it turns out it was the hose. Not sure if there's something lodged in it or what, but I replaced it and now I have way more flow and pressure, and consistent heat! I can't believe all this time it was such a simple thing. What's funny is I'd bought a different shower head because of the lack of pressure, but that one had even less pressure. But that was because I didn't change out the stupid hose when I tested it! How ridiculous.

Thank you all for the suggestions.

 

[txloser]

That’s great it worked out.

We all sometimes miss slightly obvious stuff. I bought my trailer just over a year ago. 6 months ago, I decided I’d swap out the water filter with the spare I got when I purchased. Turns out that wasn’t a spare. I went over 6 months with no water filter installed. Now I have to figure out how to get the little deposites out of my shower head to get it working like new again.