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hi the heater was on ignite but the flame didn't ignite it when bang will it start up again I turned it off

Rinnai Heating &... | Answered on Mar 12, 2019


Code 12 is a flame failure.
First step in diagnosing the root of the issue is to check for any separation, obstruction, or failure in the vent system.
Second step is to use the isolator kit under the heater to flush the heat exchanger with vinegar or rectorseal calci-free.
These two things are a great starting point to working on any tankless water heater. Flame failure can be as simple as the heat exchanger being clogged not allowing the sensors to work properly or the exhaust being mixed with the air intake. If the problem persists I would suggest having a Rinnai Certified Tech look at the heater.

Rinnai Water... | Answered on Mar 02, 2019


I have a propane monitor heater just installed 2 months ago and I get an e 13 code and the heater won't stay on???

Rinnai Toyostove... | Answered on Feb 02, 2019


I wonder if you have this problem below caused by a drop in water pressure from someone flushing a toilet or a washing machine. I would call the company to remedy this issue.

17. What is a cold water sandwich effect? The term “cold water sandwich effect” is a term that is used to describe the introduction of cold water into the hot water supply line during frequent on/off operation of an instantaneous water heater. The cold water sandwich effect, when present, appears as a momentary drop in hot water temperature as it is discharged from a hot water supply outlet (i.e. shower, tub, or faucet). This phenomenon is present in the operation of all instantaneous, tankless style, water heaters, but is minimized with the high tech design of Rinnai water heaters.
The technology built into the Rinnai water heaters is designed to minimize the cold water sandwich effect. Rinnai water heaters are microprocessor controlled and when water flow through them ceases, they remain in a “ready to fire state” for approximately 1 minute. If water flow through a Rinnai water heater begins within the first minute following water flow stoppage, the water heater will fire back up within 1 to 2 seconds. This minimizes the cold water sandwich effect that would otherwise be experienced with a low tech tankless water heater. It should be noted that the cold water sandwich effect cannot be removed completely from tankless style water heaters. The safety standards developed to insure the safe operation of water heaters require a delay in the ignition sequence of all gas water heaters.
While the cold water sandwich effect cannot be completely eliminated from standard plumbing systems, it can be eliminated from plumbing systems that have a supply and return hot water circulating system. Rinnai has developed 2 methods to eliminate the cold water sandwich effect in residential hot water circulating systems.
The first (and preferred) method to remove the cold water sandwich from circulating systems utilizes a small electric tank water heater (powered up) that is used with a dual purpose. The small water heater acts as a mixing tank to eliminate the cold water sandwich effect from the Rinnai water heater and it uses its electric heating element to offset the heat losses from the hot water circulating system.
The second method to remove the cold water sandwich from circulating systems utilizes a small 2 to 6 gallon storage tank installed on the hot water outlet of the Rinnai water heater. This tank acts as a mixing tank to blend the cold water sandwich with hot water and eliminating its effect at fixtures.

Rinnai Water... | Answered on Jan 24, 2019


I had the same problem last night and this morning. Its in the manual. I had to take the fan off of the back and vaccuum out all of the dust/lint that built up and it was a lot. It is a safety feature. It's a overheating protection feature that usually triggers if there is build up in the fan, front vent or vent pipe to the outside. I hope this helps.

Rinnai Toyostove... | Answered on Jan 22, 2019


Please send the functions in english. Below image is attached
1_12_2019_1_56_35_am.jpg

Rinnai... | Answered on Jan 22, 2019


find a local heating supply supplier

Rinnai Heating &... | Answered on Jan 06, 2019


Google (rinnai)(Rc 330)(manual) without parens.

Rinnai Heating &... | Answered on Dec 30, 2018


Lock function

This feature locks the buttons to
prevent unintended operation.
Press the Lock button to activate and
the lamp will glow.

Pressing and holding the Lock button for two seconds
will disengage the Lock.


If the Lock is engaged while the unit is
operating, all buttons will be disabled
except for the ON/OFF button.

If the Lock is engaged while the unit is
off, then all buttons will be disabled. The Lock must
be disengaged in order to turn the unit on.

Rinnai Heating &... | Answered on Dec 29, 2018


You probably need to contact a service company. I cannot find anything on the internet with regards to your unit

Rinnai Heating &... | Answered on Dec 23, 2018

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