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Tankless water heater problem Working fine for the first
Tankless water heater problem Working fine for the first shower of the day. Second shower in a short amount of time won't come back on.… read more
WCohn
WCohn
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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
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WCohn
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Rinnai r53ip. Have soot build up in exhaust, blew out, still
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Phil
Phil
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Rinnai hot water heater starts beeping at 11. It is set at 120
My Rinnai tankless hot water heater is set at 120 degrees. Tonight the unit goes to 11 and starts beeping - there is no hot water coming from any faucet. I pushed the on/off button to turn it off and … read more
Bill
Bill
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Vocational, Technical or Trade Scho
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Just installed a RHEEM ECO200DVLN3-1 Tankless water heater.
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Rick
Rick
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I have a Rheem Tankless Water Heater RTG74PVN2 - which has a
I have a Rheem Tankless Water Heater RTG74PVN2 - which has a Error C2 11 error code - it has a good size gas line and I have cleaned out the burners - but still no hot water. Try's to kick on but clic… read more
WCohn
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I have a Rinnai RUR98i tankless water heater. The technical
I have a Rinnai RUR98i tankless water heater. The technical specifications show a minimum hot water capacity of .26 gpm. My unit doesn't kick on until 1.1 gpm according to diagnostic code 1 on the con… read more
Jed Noble
Jed Noble
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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.
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I bought a Bossch tankless 13 liter lp gas water heater it
I bought a Bossch tankless 13 liter lp gas water heater it turns on when the hot water tap is on, but after only a miute or two it shuts off and then starts again after a few seconds, but in between y… read more
Noah Klein
Noah Klein
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My daughter had our garden hose running down the exhaust of
My daughter had our garden hose running down the exhaust of our Rinnai water heater. Luckily the electrical is all fine, and we have let it sit for a day to dry out. When I try and use it now, the cod… read more
Rick
Rick
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hello pitsch - what do you know about tankless water heaters and is this going to cost me
hello pitsch - what do you know about tankless water heaters and is this going to cost me anything ;) first a c8 12 error with some hot water but not full now after cleaning getting a c2 11 error - on… read more
Marc
Marc
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Our rinnai gas water heater has occasionally been making vibrating
Our rinnai gas water heater has occasionally been making vibrating noises. Then would stop heating the water, and the number 12 would appear on the temperature readout and start beeping. The fix would… read more
WTRHTRPRO
WTRHTRPRO
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Good morning I have eco sense Rheem tankless water heater
Good morning I have eco sense Rheem tankless water heater and show code C2 / 11 all the time what is the probem and how do I fix it. Model # XXXXX 74 PVN 2 Thanks Ed Cogo… read more
WTRHTRPRO
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I am getting error 11 on my r75s rinnai tankless water heater.
I am getting error 11 on my r75s rinnai tankless water heater. no ignition, but think i hear the clicking of a solenoid valve… read more
WTRHTRPRO
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I have a Rheem Whole House Tankless Water Heater. It was installed
I have a Rheem Whole House Tankless Water Heater. It was installed with a 1/2 inch gas supply line. It has worked for over 2 years without a problem, now it displays code 11. I have been told it needs… read more
WTRHTRPRO
WTRHTRPRO
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My Rinnai tankless water heater MC-91-1US does supply hot water.
My Rinnai tankless water heater MC-91-1US does supply hot water. There are two problems: one is that when teh water tap is open, the in "use" indicator was not on. The other problem was that the pre-s… read more
Marc
Marc
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Vocational, Technical or Trade Scho
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I have a Rheem rtg-74pvn-2 tankless hot water tank. The unit
I have a Rheem rtg-74pvn-2 tankless hot water tank. The unit is approximately 18-24 months old. About a month ago I began getting a code that indicated a water pressure problem. Rheem sent me a new ci… read more
Rick Mather
Rick Mather
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Vocational, Technical or Trade Scho
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I have a Bosch model AQ125BNG tankless hot water heater hot and cold fluctuations
Currently when I first turn the water on there is no issue and the water is very hot which is perfect. But with-in 5 minutes it goes cold and stays cold unless I shut the hot water off then back on ag… read more
Dave
Dave
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Meet the Experts:

Marc

Marc

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Jerry

Jerry

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Theplumber717

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Retired mech. contractor, shop owner, 51 yrs experience.

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Bud

Bud

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Rick Mather

Rick Mather

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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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