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RESOLVED: Rinnai Tankless Hot Water Heater Issue
Posted by tap011 on 1/13/20 at 9:26 am40
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!
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
re: RESOLVED: Rinnai Tankless Hot Water Heater IssuePosted by Art Vandelay on 1/13/20 at 9:41 am to tap011
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?
re: RESOLVED: Rinnai Tankless Hot Water Heater IssuePosted by countryboycansurvive on 1/13/20 at 9:52 am to tap011
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.
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
re: RESOLVED: Rinnai Tankless Hot Water Heater IssuePosted by NASA_ISS_Tiger on 1/13/20 at 10:07 am to tap011
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).
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re: RESOLVED: Rinnai Tankless Hot Water Heater IssuePosted by Bedhog on 1/13/20 at 10:22 am to NASA_ISS_Tiger
quote:was my first thought. OP, Did this just start happening or has it always done this since the instillation?
Does your shower head have one of those flow-rate restrictors in it?
re: RESOLVED: Rinnai Tankless Hot Water Heater IssuePosted by tap011 on 1/13/20 at 10:29 am to NASA_ISS_Tiger
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.
re: RESOLVED: Rinnai Tankless Hot Water Heater IssuePosted by NASA_ISS_Tiger on 1/14/20 at 7:46 am to tap011
Be careful...might feel like it'll take off your skin. I know the first time I felt it....I was like WOW.
re: RESOLVED: Rinnai Tankless Hot Water Heater IssuePosted by UltimaParadox on 1/14/20 at 10:29 am to Art Vandelay
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
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