How do I fix error code 11 on Rinnai?

Asked By: Saim Goyena | Last Updated: 21st March, 2020
Category: home and garden home appliances
4.3/5 (4,790 Views . 41 Votes)
Rinnai fault code 11 – No ignition. Check to make sure the gas is turned on at the water heater, gas meter or tank. Ensure the igniter is operational. If gas is being supplied to the tankless water heater and the igniter is working, call for an evaluation by a qualified plumber.

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Keeping this in consideration, what is code 11 on a Rinnai?

Rinnai error code 11 is an indication that there is no ignition in, or no gas supply to your hot water system. Locate your gas supply and ensure it is turned on. Test your gas supply by turning on a gas appliance, such as a stove-top.

Additionally, how do I get a Rinnai error code? If your water heater is connected to MC-91 or MCC-91, you can easily find the most recent error codes. Press and hold the ON/OFF button for two seconds and press the arrow "UP", the last nine Rinnai error codes will appear and flash one after the other.

Likewise, how do I fix noritz Error 11?

How to Troubleshoot a Noritz Code 11

  1. Find the gas valve connected to the Noritz water heater and turn the gas valve counterclockwise until it no longer turns to open it completely.
  2. Turn the power off to the unit by pressing the "Power" button. Run hot water from a nearby faucet.
  3. Turn the hot water back off. This should resolve the problem.

What is the priority button on Rinnai?

Press the “Priority button” on the temperature controller. The green Priority light will glow indicating that this controller is controlling the temperature and that the Rinnai Tankless Water Heater is ready to supply hot water. IMPORTAnT: The priority can only be changed while no hot water is running.

32 Related Question Answers Found

What is code 12 on Rinnai?

Rinnai Error Code 12 Troubleshooting
Error code 12 indicates your Rinnai hot water system has a flame failure or low gas flow. Check gas is turned on at the gas metre or cylinder. Check gas is turned on at the water heater. Check there are no obstructions to the flue outlet.

How do you check the flow rate of a Rinnai tankless water heater?

Check if the tankless is producing a water flow using the temperature controller by pressing the "UP" button for 3 seconds and then the "ON/OFF" button. The number displayed will be your flow rate. (ie. 7 = 0.7 gpm, 25 = 2.5 gpm).

How do you vent a Rinnai tankless water heater?

Tankless water heaters can vent through the roof or a side wall, creating more flexibility and options for placement. Traditional gas tank water heater require venting through the roof. Tankless water heaters use fans to blow exhaust from the unit horizontally, allowing vents to terminate on the side of a house.

How do you troubleshoot a tankless water heater?

How to Maintain Your Tankless Water Heater
  1. Turn off the water inlet and outlet valves on the water heater.
  2. Flip the circuit breaker to off or shut off the gas to the heater.
  3. Find the tab for the pressure-relief valve.
  4. Pour the vinegar into the 5-gallon bucket.
  5. Place the submersible pump in the bottom of the bucket.

What does code 90 mean?


A 90 error code indicates a combustion abnormality. This means that the mixture of fuel and air is off from specification and is resulting in poor quality combustion. Common issues associated with a 90 error code: 1) Insufficient gas supply. 2) Blockage in the flue vent.

How do I reset noritz?

When nothing else works, you should reset your Noritz tankless water heater. It's an easy job, and you only have to press the Reset button. It's typically found on the front panel. Should you not be able to fix the problem by resetting your unit, it's time to call in for an authorized technician for farther assistance.

How do you descale a tankless water heater?

Connect a drain hose to the hot water drain valve and place the end of the drain hose into the bucket. 7. Pour between three and four gallons of vinegar into the bucket so that the pump is completely submerged. Open both drain valve lever handles on the isolation valves and turn on the pump for at least an hour.

How do I fix noritz Error Code 66?

Error Code 66
Problem: Problem with the bypass flow control valve. Solution: If there is a blockage of bypass servo, correct it. If the element is not operating properly, replace it.

How do I fix noritz Error 90?

Noritz Error Code 90
Possible culprits are insufficient gas supply, a blockage in the fuel vent or debris in the fan motor. You will need a licensed contractor to resolve this error. He or she will check gas pressures, venting length, dip switches, etc.

How do I fix error noritz Error 29?


Error Code 29
Condensing water heaters use a drain line equipped with a neutralizer to remove the condensate. If this line is blocked or proper drain piping is not used, the burner could flood. The typical fix for this error code is to clean out the container and drain line of any debris or blockages.

Why is my tankless water heater shutting off?

There are a few things that could be causing your electric tankless water heater to shut off. It could be something as simple as a loose wire. Check that the heater is getting electricity, gas and water. Check the filter to make sure that there's no debris in it.

What does LC mean on a Rinnai water heater?

Error Code 00 or “LC”: Scale build up in heat exchanger.
Note: A lot of customers ignore this code because it still allows the tankless water heater to continue running. You will see the display alternates between the LC code and the temperature setting.

Why is my Rinnai beeping?

A water heater may sound a beep to warn that there is a water leak. Beeping may also signal a gas leak. Low Fuel. Some propane-fueled water heaters emit a beep when they are low on fuel.

How does a Rinnai water heater work?

When the need for hot water arises by turning on a shower, washing machine, dishwasher or faucet, cold water flows into the Rinnai Tankless Water Heater from the inlet pipe at the bottom of the heater. The flame is ignited and heats the two heat exchangers that are included in the Super High Efficiency models.

Are Rinnai tankless water heaters good?


Pros: This is often considered the best Rinnai tankless water heater for these reasons: It is very efficient, using up to 96% of the fuel used to create heat. It has a built-in 360 ThermaCirc recirculation pump that keeps hot water in the water line near the tap or shower, so you don't have to wait for hot water.

How do I reset my Rheem water heater?

Turn the water heater's gas valve switch to the "OFF" position, wait for a few seconds and then flip the switch to the "ON" position to reset the system.

Can you use a tankless water heater for radiant heat?

Though they are sold primarily for domestic hot water, tankless heaters are actually well-suited for radiant heating, which operates at low temperatures compared with, for example, hot-water baseboard. So using the unit for radiant heating generally has little or no effect on the sizing calculation.