Posted by
Message
tap011
New Orleans Saints Fan
Louisiana
Member since Oct 2013
549 posts

RESOLVED: Rinnai Tankless Hot Water Heater Issue
Figured I might could get some help/advice here. I’ve got a Rinnai RL75eN that I have recently started having some issues with.

It seems that only my shower in my master bath doesn’t get hot water. When I turn it on, the light on the controller doesn’t come on and I get no hot water. I’ve figured out that having the hot water tap on the sink makes it come on and I usually run it with my shower to get hot water. I’m guessing/hoping that my shower doesn’t have a high enough flow rate to make the heater kick on? Any have any experience with this?

Update: Removed the little blue flow restrictor from the shower head and man, the pressure I never knew I had. Fixed my problem. Thanks guys!
This post was edited on 1/13 at 10:11 pm


Art Vandelay
LSU Fan
LOUISIANA
Member since Sep 2005
8419 posts

re: RESOLVED: Rinnai Tankless Hot Water Heater Issue
I think mine did the same at my old house. It is probably flow rate. You do need to clean those tankless heaters. There is a flush you can do to remove scale. Where are you located?


countryboycansurvive
LSU Fan
Rapides Parish, LA
Member since Oct 2017
69 posts

re: RESOLVED: Rinnai Tankless Hot Water Heater Issue
Does your shower faucet have only one handle or 2 knobs?

Mine has the one handle and if mine gets to where no hot water is coming to the shower, then I can change out the cartridge in the faucet and I get hot water again. Something about the faucet cartridge getting stopped up.

I have the tankless hot water heater also.
This post was edited on 1/13 at 9:54 am


Replies (0)
Replies (0)
00
NASA_ISS_Tiger
LSU Fan
Huntsville, Al via Sulphur, LA
Member since Sep 2005
7209 posts

re: RESOLVED: Rinnai Tankless Hot Water Heater Issue
Does your shower head have one of those flow-rate restrictors in it? I had to remove one at my mom's old house to get the flow rate right for that system. It was an optional piece (for eco-friendly homes).


Bedhog
LSU Fan
Denham Springs
Member since Apr 2019
3569 posts

re: RESOLVED: Rinnai Tankless Hot Water Heater Issue
quote:

Does your shower head have one of those flow-rate restrictors in it?
was my first thought. OP, Did this just start happening or has it always done this since the instillation?


tap011
New Orleans Saints Fan
Louisiana
Member since Oct 2013
549 posts

re: RESOLVED: Rinnai Tankless Hot Water Heater Issue
I’ve been in the house since April. Only recall this happening in the last 2-3 months. Single knob shower. Located in NWLA.


Replies (0)
Replies (0)
00
tap011
New Orleans Saints Fan
Louisiana
Member since Oct 2013
549 posts

re: RESOLVED: Rinnai Tankless Hot Water Heater Issue
Going to check when I get home and see about the flow restrictor. I took the shower head off a while back to make sure the screen wasn’t clogged up but didn’t see any issues.


Replies (0)
Replies (0)
00
NASA_ISS_Tiger
LSU Fan
Huntsville, Al via Sulphur, LA
Member since Sep 2005
7209 posts

re: RESOLVED: Rinnai Tankless Hot Water Heater Issue
Be careful...might feel like it'll take off your skin. I know the first time I felt it....I was like WOW.


Replies (0)
Replies (0)
00
UltimaParadox
Alabama Fan
Huntsville
Member since Nov 2008
14405 posts

re: RESOLVED: Rinnai Tankless Hot Water Heater Issue
quote:

You do need to clean those tankless heaters. There is a flush you can do to remove scale.


If it wasn't doing it before, and fixing the flow rate fixed it....

If you have had it over a year, definitely look into flushing it. It is really simple, just 45 minutes with straight vinegar


Replies (0)
Replies (0)
00
first pageprev pagePage 1 of 1next pagelast page
refresh

Back to top

logoFollow TigerDroppings for LSU Football News
Follow us on Twitter, Facebook and Instagram to get the latest updates on LSU Football and Recruiting.

FacebookTwitterInstagram