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I do have a problem with my Rinnai Tankless Heater. I have
I do have a problem with my Rinnai Tankless Heater. I have code 11 showing up on the thermometer electronic dial. That happened few times a day. another few times heater will work with no problem. Tec… read more
WCohn
WCohn
Journeyman Plumber
1,983 satisfied customers
New rinnai water heater, 1-1/2" gas line. When turning on
when turning on tub hot water turns cold however on shower and sinks there's no problem get code 12 … read more
WCohn
WCohn
Journeyman Plumber
1,983 satisfied customers
I have a Rinnai tank less water heater that is flashing code
I have a Rinnai tank less water heater that is flashing code 11. I have put in a new igniter and heat rod, cleaned the burner unit and fan, and blown out the exhaust system. The unit will come on and … read more
WCohn
WCohn
Journeyman Plumber
1,983 satisfied customers
I have an 8 year old /W water heater and it is not heating
Hello - I have an 8 year old B/W water heater and it is not heating properly. Only a portion of the tank gets heated - the water is as hot as need be, however, it is in limited quantity. The error mes… read more
Rick
Rick
Supervisor
25,560 satisfied customers
I have a Rinnai ruc98.tankless water heater, and as of last
Hello, I have a Rinnai ruc98.tankless water heater, and as of last evening, I have no hot water. I did have hot water Monday morning. My gas is on, and the breaker is active. No error codes displayed.… read more
WCohn
WCohn
Journeyman Plumber
1,983 satisfied customers
We have a Rinnai R85 installed on outside with error code
We have a Rinnai R85 installed on outside with error code 12. Also water is dripping out of cabinet. About 9 years old. Thoughts? Have checked power and cycled on/off with no change … read more
WCohn
WCohn
Journeyman Plumber
1,983 satisfied customers
I keep getting error code 12. When I tried to clean out the
I keep getting error code 12. When I tried to clean out the exhaust / intake, I found crystalized something (hardened on one side of the hole). How do I clean it out? … read more
WCohn
WCohn
Journeyman Plumber
1,983 satisfied customers
I have two Rinnai tankless water heaters. The second is to
Hello, I have two Rinnai tankless water heaters. The second is slave to the first. They are continuum model 2532. I am getting error code 12. The main will light for two seconds then the flame goes ou… read more
Mike R.
Mike R.
3,210 satisfied customers
6 year old rinnai. No problems till now. Code 12 checked and
6 year old rinnai. No problems till now. Code 12 checked and reset fuse box outside. Rinnai started and ran through the night. An entire tank of gas. Found out this am when I went to heat coffee … read more
Rick
Rick
Supervisor
25,560 satisfied customers
I have a Rinnai RHFE-556WTA propane wall heater which will
Hi, I have a Rinnai RHFE-556WTA propane wall heater which will start briefly then give error 12, which in the past has happened when the propane tank has run out while the heater is on. There was a po… read more
WCohn
WCohn
Journeyman Plumber
1,983 satisfied customers
Have had two rinnai water systems in 10 years. latest one is
have had two rinnai water systems in 10 years. latest one is 2 yrs. old. hot water depletes in the master shower and turns cold within a minute or two. new shower valve replaced in control handle, hav… read more
WCohn
WCohn
Journeyman Plumber
1,983 satisfied customers
I get intermittent hot water, runs hot then cycles to cold,
I get intermittent hot water, runs hot then cycles to cold, no error codes, then back to hot. … read more
Rick
Rick
Supervisor
25,560 satisfied customers
Our Rinnai stops heating water. By restarting (turning off
Our Rinnai stops heating water. By restarting (turning off and then back on) it will function for a while but will usually last only a day before having to re-boot.… read more
Rick
Rick
Supervisor
25,560 satisfied customers
This is a new installation (replacing an old tankless heater),
This is a new installation (replacing an old tankless heater), first time trying to run. We get error code 11. The burner comes on for a few seconds (is a little light on the conetrol panel showing fi… read more
Rick
Rick
Supervisor
25,560 satisfied customers
I have an R75LSi heater, has run flawlessly 4 years. Today
I have an R75LSi heater, has run flawlessly for over 4 years. Today got an error code 12. Unit will run, flame blue and perfect, but then cuts out, then will start again after a half minute or so. No … read more
Mike R.
Mike R.
3,210 satisfied customers
R98 propane indoor heater has run perfectly until today; we
R98 propane indoor heater has run perfectly until today; we have had extremely cold weather the past few days, and the heat quit (Rinnai is on a hybrid system like a radiator as heat exchanger). Error… read more
Mike R.
Mike R.
3,210 satisfied customers
We had a R1nnai water heater installed last May. After 12
We had a R1nnai water heater installed last May. After 12 months of electric bill approx 100 dollars more than usual we had an electrician come in to see where the power was going. It was the storage … read more
Phil
Phil
Mechanical Engineer.
Degree, Mech Engr Technology
632 satisfied customers
Hi there. Our Rinnai Model 2520 has an 11 and 12 error. The
Hi there. Our Rinnai Model 2520 has an 11 and 12 error. The filter is clean, and our plumber went through all of the troubleshooting tips on the error code sheet and everything checks out, but it's st… read more
Marc
Marc
Plumber
Vocational, Technical or Trade Scho
1,127 satisfied customers
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Marc

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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