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Hello my name is ***** ***** I look forward to helping you! Can you get me a model and serial number?
R75LS serial 08. 05-136958 may 2008
mr. wade , you did get my answer? jerry
I do not see it in my side.
model r75ls serial 08. 05-136958 may 2008
Got it. Rinnai tankless
Are you getting an error code on the display?
I have never mointered the display when IN USE. MY display just indicates temp and up and down arrows. no one ever gave me any info on this heater. I did just this am download troubleshooting manual from rinnai and I may be getting cold water water sandwich due to pressure changes as I live on a hill and had to install a pump and storage tank between my house and the county water supply as the county pressure would not supply all way to house. holding tank will drop pressure causing pump to come on to rebill pressure in tank which is under the house.. your opinion?
So you haven't actually witnessed it turning off, but you have felt the water go cold?
what happens. I will be showering and no problem for a few min then water starts to run cold. I will turn water completely off for about a min and restart and the hot water will come back on. sometimes I have had to do this several times while in shower. more info, just turned on both cold and hot faucets in both baths and went under house to ck heater and it came on for a couple min and then just shut off as if I had turned off the hot water. no error number came up o display
We need an error code run the hot water like you were showering. The same temp as you normally use and let it run. Don't shut it off until it shows an error code. Some issues require multiple failures before it codes. I'll bet you are getting a 10 or 12
I will go turn on shower and go under house and watch heater and get back with in several min. do not go away, tks
I am a factory trained and certified Rinnai tech. I'm out in the field today so be patient and we will get this figured out
heater came on and stayed on about three min then turned off after about a min came back on. was still on when I left but I did notice when it was going off and made a noise like a elec fan speeding up and slowing down but this may be normal . at no time did get an error message number
heater turned off that one time and shower has been running for 15 or 20 min and no problem. after reading in manual about cold water sandwich due to water pressure I feel this may have been my problem all along when connected to not having any error messages, possible when my water pump kicks in it keeps enough pressure on heater and does not let water pressure go up and down. your thoughts.
Okay I'm here to help. Can you send a picture of the control panel?
Do you still need help?
can't send picture but maybe I can describe. top roe, left side- temp gage. right s. - small lite label -In use ... 2ed row LS-up arrow. RS- box labeled (priority). 3rd row- LS- down arrow. RS- on/off switch. at bottom of box (mc81-1us-s)... what did you think about my theory?
Press and hold UP button and PPOWER button until it display changes. It'll give 01 then an error code 02 and another code. Might go all the way to 09. Write them all down until you get two -- dashes.
I just went under house and pressed the up button and (on/off) same time. unit turned off . did not display any error codes , had to press button to get the unit back on. what is this priority button? I press it and nothing happens.
Can you send me a picture of the vent termination.
as explained unable to send picture but vent direct to outside and I checked yesterday when I was running shower the outlet and it was blowing out the vent, no blockage. the heater sets next to the outside wall and vents direct to the outside.
Well, the problem we have is you are unable to retrieve stored error codes. All Rinnai controllers should be able to retrieve the codes. Can you try turning it off the when you turn it on hold down the on button for three seconds then press the up button.
I will try and get back with you. may be tomorrow as I have some other things I have to do. tks
I did what you advised and the screen went from one to nine and then displayed the two dashes... no one code came up and stayed up. I tried this several times with the same results.