Water heater only producing warn water, 90F

[Crackerssouth]

I have been RV'ing for 20 years and never thought I could make such a dumb mistake. Hot water tank was leaking at the back where the water outlets are on our 3250 Big country. Turned off the power inside, tightened the connections and stopped the leak. Did a quick pressure test with the outside shower, good to go. Not quite, only had warm water, not hot like before. Tested the element , good. Tested both thermostats and they were good. After much time on the Internet and You Tube, YT have a video titled "don't make this newbie mistake". That was me. Turns out I had left the outdoor shower taps both open, therefor the shower had now become a mixing valve. Closed both taps, water temp suddenly went to 130F.... I noticed a lot of posts about not hot enough water. Maybe someone turned on the outside shower for some reson and never turn the taps off. This would be something to check on your rig

[doxiemom11]

I have noticed that if DH shuts the inside shower off with the hand control instead of the on/off knobs, I can only get warm water in the kitchen. Of course I'm usually trying to do dishes and warm just will not do. Takes a minute sometimes to remember to check that.

[ScottG]

We all have to do that one at least once!
When it happened to us, I figured it out between her shower (cold) and mine (hot). :B

[dougrainer]

1. I do not doubt this happens
2. I have been and still am a RV Technician for 37 years and have NEVER seen this or had a customer with this problem
3. What I find amazing is, almost ALL Inside and outside RV shower Heads that have a water cut-off, they are NOT positive cut offs. They will drip. They make them this way because those white hoses are NOT designed to have continuous 45 plus PSI on them.
4. So, if you leave the outside faucets ON and obviously the shower head cut off is shut off, then you would think you would notice that the area by the Outside Faucet has a water build up after a few hours or a few days, either filling up the water bay or dripping on the ground. Doug

[Kit_Carson]

Thanks for the heads up. I never thought of that.

[wa8yxm]

Feel proud.. YOU figured it out without asking.. Not all are that lucky.

I've not done that (yet) But I have helped a few who did.

[WILDEBILL308]

There is one outher way to have the same problem. I had a drain plug leak on the hot water heater. so I closed the winter bypass valve so I could have water on in the coach while I worked on the leak. Well when I moved the valve back to the regular position the handle slipped on the valve stem and did not fully close the valve. This produced just slightly luke warm water at best.
Bill

[DutchmenSport]

Yup! I think that's happened to all of us at one time or another!

Our Springdale had an outside shower, and the first trip out water was luke warm only. It was Friday night and my dealer was closed. I was crying thinking something was broken with the camper.

Next morning (Saturday) I called the service department. The guy kind of chuckled a little and told me everything was OK. Just check the outside shower. He almost guaranteed me that's where the problem was. I did while he was still on the phone, and sure enough! Bingo!

Truly, everyone has experienced this! And the first time it happens to the "uninformed" it's mind boggling! And so relieving when the fix is so simple!
DUH!

[Dutch_12078]

Yes, it's a fairly common oversight that caused warm water issues. The inside shower will do the same thing if either the dribble is not noticed or a positive shutoff valve has been installed. Another common warm water error is incorrect bypass valve settings.