No hot water to kitchen sink in 38MB

[Lear2017]

We have a 2018 Riverstone legacy 38mb with a tankless hot water heater. We usually have to fill the fresh water tank and turn on the pump to have enough pressure to have hot water in the bathroom. But I don’t get hot water to the kitchen sink, even when the Hot Water panel in the bathroom reads 122 degrees. There have been a few times when I have had lukewarm water at the kitchen sink but not lately. Any suggestions?

[nomad297]

Originally Posted by Lear2017

We have a 2018 Riverstone legacy 38mb with a tankless hot water heater. We usually have to fill the fresh water tank and turn on the pump to have enough pressure to have hot water in the bathroom. But I don’t get hot water to the kitchen sink, even when the Hot Water panel in the bathroom reads 122 degrees. There have been a few times when I have had lukewarm water at the kitchen sink but not lately. Any suggestions?

You are not getting enough flow through your kitchen faucet to trigger the flow sensor in your tankless water heater. You need to increase the flow at the faucet.

Remove all water restrictors from your kitchen faucet. You can find them in several places, and many kitchen faucets have more than one. You can find them in the aerator, at any connection on the hose that leads to your spout (if you have a pull-out head) and other places — it all depends on the type of faucet.

Bruce

[nomad297]

Did you work it out?

Bruce

[dblr]

Just a crazy thought but have you checked the water manifold? Maybe the valve is off by mistake or somehow got bumped to the off position.

[nomad297]

Originally Posted by dblr

Just a crazy thought but have you checked the water manifold? Maybe the valve is off by mistake or somehow got bumped to the off position.

I believe he has water, just not hot water.

Bruce

[dblr]

Originally Posted by nomad297

I believe he has water, just not hot water.

Bruce

I kind of figured that but hey you never know, as my daddy use to say, start with the simple things first, but you know I never listened

[Fishrsafe]

Check what Nomad suggested. When we did the PDI on our 2018 38FB2 we had hot water everywhere but the kitchen sink. The tech removed the flow restrictor water saver insert and the problem was solved. Hope this helps.

Pete

[Lear2017]

Thanks for the suggestions. We took the faucet apart but couldn’t find a restrictor. We are taking it in for warranty work in a few weeks and will ask them to remove it then. We did find that our water regulator was set too low and adjusting that helped. We can get hot water now but pressure is still low at the kitchen sink. Hoping that removing the restrictor will help.

[jdmoody09]

We have the same issue in our 2018 39FK...

[5picker]

Originally Posted by jdmoody09

We have the same issue in our 2018 39FK...

Is your issue the exactly the same?
Do you have a tankless water heater?
Did you try the suggestions posted in this thread?

I see this is only your 3rd post... Welcome!

If your issues are not exactly those of what is described in this thread,I suggest you create a new post as other posters may not see your query. You will get a lot more help finding a cure if you create your own post.

[Cypressloser]

This is in addition to what has already been suggested.


The Girard tankless water heater is very sensitive to incoming water temperature, flow rate, water pressure and changes in any of the above while it is running. The copper tubing makes barely 3 loops around the water heater's burning chamber before it exits, that is not enough if pressure, flow or water temperature change. It is even suggested to use the freshwater tank rather than city water and I agree. On top of this, the water heater has not a high enough heat output to heat up very cold incoming water, we couldn't get it over 95 deg. F.

The Girard Gen. 2 has a flow adjuster knob on the back of the unit, it may help to reduce the flow to ~1 gpm but it has to maintain at least 0.5 gpm or else the heater shuts down. It also cycles on and off when the freshwater pump cycles when you're using the onboard freshwater tank.

Also, opening the hot water to quickly, especially when a pressure regulator is installed or on relatively low city water pressure, can cause the flow sensor in the heater to go off, put it into error mode and shut down.

Observe the control panel in the bathroom when the shower is on and compare both, the flow rate (time it, don't guess) and temperature to the kitchen faucet. It should be nearly the same (some temperature drop is normal due to the longer distance) as long as the flow rate is identical.


It's only a crap shot but I hope it helps.