Question about Rinnai Water Heaters

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Heater still runs after shutting off

I shut my heater off and it comes back on once in a while and runs blowing heat for about a minute. is that normal

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  • Contributor
  • 33 Answers

Fan will come to dissipate any heat build up in heat exchanger

Posted on Apr 22, 2014

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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muttandjeff
  • 359 Answers

SOURCE: heil heater starts/stops before reaching temp

is installed in a vertical up flow or horizontal position , if in horz position you could have a bad or miss positioned roll out switch this is a thermal switch positioned toward the burner edge that if the flame rolls out of burner area trips and then resets as it cools allowing the furnace to re-start until it reaches temperature , something to check .

Posted on Dec 09, 2008

gary1121
  • 332 Answers

SOURCE: heater stops heating water

you have to much volume of water going thru the unit, did you size it properly by haow many baths and showers you have or did you just by the cheapest one,, there is a scale to go by run just one shower and see if it changes temp, with nothing else running,, a shower has 2.5 to 4.5 gal per min,, then you can also check to make sure it has the right size gas line 3/4 from the meter to the unit is required at a min of 2lbs of gas

Posted on Jun 21, 2009

  • 244 Answers

SOURCE: PALOMA PTG-74PVN-1 Code C8 12 my water heater

C8 is the last stop in the point of burner ignition and a total of eight error codes. Error code 12 is a supplemental code that means your LP gas supply is too low...have your LP tank service and try again.

HTH,

Mike...

Posted on Dec 06, 2009

  • 332 Answers

SOURCE: I have a RV Atwood water heater and it ignites and

You may have a control board issue, there is no sensor that is IN the water tank your thermostat controller are exterior to the tank under the black foam looking piece which I think is where your trouble lies

Posted on Mar 05, 2010

  • 127 Answers

SOURCE: The hot water shuts down for a few minuts then

your unit is undersized or you do not have enough gas supply to run the unit properly.
If you have to many water features running or you have to many gas items turn on at the same time it can cause problems.

Posted on Apr 11, 2010

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1 Answer

Tank less water heater will send cold water to shower after five minutes of hot water.


Not supposed to work like that unless the flow of cold water thru coil is at at a really high rate. Think the heating element is shutting down prematurely and not closing back normally as quickly as it should. Check schematic for device that controls it.

Sep 07, 2017 | Water Water Heaters

1 Answer

Rinnai RL94i - Produces hot water for 3 minutes, then stops


I just had this exact problem. It kept getting worse until we had no water. Our Rinnai tankless hot water heater started the same way though, with hot water for a few minutes and then would shut off with an error code 10. We just had to shut the hot water off and then back on, wait a minute or so and we had hot water back for a few minutes. Our unit would come on with a loud vibrating noise and remain until it shut off with an error code 10 (air flow fault). The solution was to remove the blower fan and blow out the squirrel cage. Ours had moths in it. We also vacuumed out the fan housing. Be careful to mark any wires you disconnect and take pictures before removal. Our unit is now almost silent when it comes on and supplies endless hot water.
8_11_2016_10_11_24_am.jpeg8_11_2016_10_11_25_am.jpeg

Jun 10, 2014 | Rinnai RL94i Tankless Water Heater

2 Answers

Lound vibration when running


Check gas control valve.

Good luck,

Marty

Feb 18, 2013 | Rinnai Water Heaters

1 Answer

How to flush out the water heater


Connect one end of garden hose to spout located near bottom of water heater. Put other end near drain or run to outside whichever suits your particular situation better. Shut off water valve at top of heater and open spout to drain. You might not have to drain the whole thing if you do this regularly. If it's never been done before you probably should. When water stops draining out shut off spout and open valve at top of tank to fill it back up. Disconnect garden hose. Water will be cold for about an hour before it has a chance to heat back up. Should be done about once a year or so depending on your water unless you have a self cleaning water heater.

Feb 09, 2013 | Rheem 50 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

GCV 40 100 Burner and pilot shuts off when heating up


Get more fresh air to the unit.
Clean the air intake/ flame trap/ flame arrestor located on bottom of tank.
http://waterheatertimer.org/images/Flame-trap-inspection-325.jpg

Post question on pro water heater forum.
http://www.thetankatwaterheaterrescue.com/forums/forum3/

Add a comment with type of gas control valve, for possible troubleshoot.
Copy following link to read service manual by type of gas control valve:
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html#intellivent

Aug 17, 2012 | A.O. Smith GCV-40 Promax Residential Water...

1 Answer

WATER HEATER GOES OUT OVER NIGHT


you either have a back draft blowing out the pilot light, or a bad thermal coupling. if coupling is bad it will shut down the gas flow therefore shutting off pilot light. its a safety measure to stop the gas flow if pilot goes out. replace thermal coupling, that may do it. good-day ! but shut off gas first !

Mar 21, 2012 | Water Heaters

1 Answer

Reliance 606 natural gas water heater - model #640YORT - water does not stay hot. pilot has to be clicked to heat and then u can use hot water til tank empty and it will not continue to heat water.


If I understand correctly, the pilot light is not staying lit.
You light the pilot and water in the tank reaches temperature.
Once hot water is gone, then pilot light has to be lit again.

Gas pressure is good, and gas is flowing.
Thermostat is working at high end because it cuts off heating.
Vent is working because tank heats up.
Air intake is working.

Gas control thermostat might not be reading low temperature. Replace gas control valve.
Pilot tube might be dirty. Clean burner parts and combustion chamber, and air intake, and vent.
Backdraft might be blowing out pilot. Check for constant updraft by running water heater 5 minutes, and then light match under vent hood and see if smoke goes up.
Very hot air can put out pilot, especially when water heater located in attic. Add ventilation.
Improper vent might have water dripping back down into combustion chamber and putting out pilot light and rusting out the parts. Inspect for rusted parts and water.
http://waterheatertimer.org/How-to-install-gas-water-heater.html#troubleshoot
http://waterheatertimer.org/pdf/Pilot-light-will-not-stay-lit.pdf

Aug 09, 2011 | Reliance Natural Gas Water Heater Control

2 Answers

I have a Powerstar Electric tankless water heater, 45-551301, installed in a new home less than 3 years ago. We have always had minor problems with the hot water staying hot, fluctuations in hot and tepid...


Tankless heater are a little frustrating sometimes but this is generally an issue of waterflow I believe. The fluctuations are do probably to the amount of water and rate of water going through the heater. If you have a shut off valve on the cold side of the heater, shut it back about half way. This will slow the water going through the heater and allow the heater to heat it up more efficiently. Then go to the shower, turn the hot on all the way (no cold) and allow it to heat up. Once it has heated up, test it by hand for a good temperature that you like. If it is too hot, turn the cold on just a bit until it comes to the temp you like. If it is too cold turn the hot down just a little (still no cold) and it will warm up. Ideally you should be able to turn the hot on full blast and then just turn on a little cold to get the right temp. Once you learn how these work then it makes it easier. You really cant run the water like you do with conventional hot water systems and expect to get the same results. Also, wanted to give you another little tip. Every 6 mos to a year, you should flush you heater with vinegar for about 30-45 minutes using a small cheap submerible pump like for a water feature in a garde. Just put in a bucket of vinegar and and run a hose to the "in" side of the heater and another from the "out' side of the heater and then back into the bucket. This will circulate the vinegar inside the heater and clean all the deposits that will DOA your heater. Funny how the manufacturer wont tell you this but these deposits will ruin the connectiosn on the heating elements. You can make your heater last for a long time if you do this.

Mar 27, 2011 | Bosch PowerStar AE115 Tankless Water...

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