Rinnai Hot Water Error Codes

Power disturbance during Bath Fill ( Water does not flow when power returns)

Error Code Remedy

• First, turn off all the hot water taps and then press ON & Off button for twice.

Air Supply, Flue or Exhaust Blockage

Error Code Remedy

• Inspect that nothing is blocking the exhaust or flue inlet.
• Make sure Rinnai approved venting materials are used.
• Verify any fan blockage.
• Check all vent components for accurate connections.

Indicating No Ignition

Error Code Remedy

• Make sure the gas pressure is correct.
• Ensure the igniter is functional.
• Verify that the gas is turned on at the water heater, cylinder, or gas meter.
• Check whether the dip switches are properly set.

When an Error Code 12displays on your Rheem tankless water heater, then it indicates flame failure.

For error code 12, it is better to call a professional technician to troubleshoot and fix your Rheem tankless water heater; however, before calling the technician, check for the following:

• Check out all gas valves and see if they are open and the gas supply to the system is all right.
• See if the flame rod wire is connected.
• Inspect the flame rod and see whether it has carbon accumulation or not.

Upon checking, contact Sydney Plumbing technician on 0402 487 444 for speedy repairs so you can enjoy your hot water showers again.

When an Error Code 13displays on your Rheem tankless water heater, then it signalsimproper or faulty combustion within the flame rod.

[Note: An Error Code 13 will only show up on your indoor Rheem tankless system.]

• Inspect if the air intake and exhaust emission is correctly installed and is in good working condition. It is paramount that the exhaust isn’t recirculating into the system’s clean air intake.
• Check and remove any barriers from the venting and where the emissions release outdoor.
• Check and confirm if the altitude settings point to your location.
• Inspect the Flame Rod FL-24.
• Inspect the Blower Motor.

Get in touch with Sydney Plumbing technician on 0402 487 444 to troubleshoot and fix your Rheem hot water system, so you can quickly get back to your routine.

When an Error Code 14displays on your Rheem tankless water heater, then it signal overheat wrap fault.

If the system has free (unclogged) airflow and venting, then it’s better to call in a technician to troubleshoot error code 14. However, you can check for the following:

• Inspect the numerous high and low fire pressures.
• Check and confirm if the right type of gas is used.
• Check the heat exchanger and see if there are any cracks and separations.
• Inspect to ensure there aren’t confinements to the airflow that is entering the system and no barriers at the vent terminal.
• Inspect for any presence of foreign materials in the combustion cavity and exhaust piping.

It’s best to contact Sydney Plumbing technician on 0402 487 444 to troubleshoot and repair your Rheem hot water system, so you can start using it again.

When an Error Code 16 displays on your Rheem tankless water heater, then it indicates over temperature warning.

Check for the following:

• Inspect for any blockages or limescale accumulationin the heat exchanger.
• Check and ensure there aren’t airflow restraints to the system, and that the vent terminal is free and not blocked.
• Inspect the outlet thermistor.
• Check thermistor of the heat exchanger.
• Inspect the gas valve.

It’s better to contact Sydney Plumbing technician on 0402 487 444 to troubleshoot and fix the error code so that you can quickly start using your Rheem hot water system again!

Problem in Electrical Grounding

Error Code Remedy

• Check all the components of the hot water unit for an electric short.

When an Error Code 21 displays on your Rheem tankless water heater, then it indicates failureof air intake filter switch.

Check the following:

• Inspect if the air filter door is seated fittingly.
• Inspect if the front panel is correctly installed.

It is better to contact a Sydney Plumbing professional technician on 0402 487 444 to troubleshoot and repair your Rheem tankless water heater.

When an Error Code 24 displays on your Rheem tankless water heater, then it signals switch malfunction.

Check the following:

• Turn Off the water and unplug the remote control; then retry.
• Double check if the tankless is appropriately grounded.
• Press the minimum (MIN) and maximum(MAX) button on the control board (PCB) to reset.

Call in a Sydney Plumbing expert technicianon 0402 487 444 to replace the PCB.

Blocked Condensate Pipe

Error Code Remedy

• Inspect that the condensate pipe is not blocked and is in a working condition.

When an Error Code 29 displays on your Rheem tankless water heater, then it indicates temperature on the heat exchanger is very low. Besides, it could signal that the neutraliser is choked on a condensing unit.

When you get this error code, do the following:

• Clean the screen of the air inlet.
• Clean the heat exchanger’s fins.

After doing the above if you’re still getting this error code on your Rheem tankless model, then check the following:

• Check the drain line for any obstruction and ensure the shipping cap is removed.
• Inside the unit, clear all the drainage ports of the neutraliser.
• Outside the unit, clear the drainage line of the neutraliser.

It’s better to call in a Sydney Plumbing experienced technician on 0402 487 444 to troubleshoot and fix your Rheem tankless water heater.

When an Error Code 31 displays on your Rheem tankless water heater, then it indicates a fault in the temperature sensor of the water inlet.

Check the following:

• Check the wiring of the thermistor for damage.
• Inspect to find out if the thermistor is free of limescale accumulation. Clean if required.
• Ohm the thermistor.

Touch base with a Sydney Plumbing professional technician on 0402 487 444 to troubleshoot and repair your Rheem hot water system, so you can quickly get back to your routine.

When you get ‘Error Code 32’ on your Rinnai water heater, then it indicates a malfunctioning or faulty outgoing water temperature sensor (thermistor).

Before commencing any Diagnostic Procedure – Turn off the power source to a unit. Turn off the gas supply.

• Check the temperature with a thermometer at the closest hot water tap or the exit hot water tank outlet.
• Ensure there are no loose, broken, or damaged connections on the thermistor.
• Examine resistance readings to ensure they are within the required specs.
• Scrutinise for scale accumulation on the thermistor.
• Check and test the sensor (thermistor) – if its found faulty, then replace it.

How to resolve an ‘Error Code 32’ on my Rinnai Water Heating System?

A qualified and equipped technician can resolve error code 32 appearing on your Rinnai hot water unit, and get you back up and running in no time. To book a service, call Sydney Plumbing on 0402 487 444, and our expert technician will quickly resolve your Rinnai hot water system’s error code and help you to enjoy your hot water bath once again.

Heat Exchanger Outgoing Sensor error

Error Code Remedy

• Check the sensor wires and detect a fault.
• Replace the sensor.

Combustion air temperature sensor malfunction

Error Code Remedy

• Make sure unit’s fan blade is tight on motor shaft and is in working condition.
• Check for restrictions in airflow around the unit and vent terminal.
• Inspect the sensor wire damage.

Freeze Protection Sensor

Error Code Remedy

• Turn the hot water tap On & Off with pressing the On/Off button on the system monitor.

Inlet Water Temperature Sensor

Error Code Remedy

• Check the sensor wiring harness for loose connections.
• Remove the temperature sensor from the unit and inspect any scale build up.
• Check the resistance reading of the sensor.
• Replace the sensor

Modulating Solenoid Valve Signal Error

Error Code Remedy

• Measure the resistance power of motor winding.
• Inspect modulating gas solenoid valve wiring harness for damaged terminals.

Burner Overheat Bi-Metal Switch Failure

Error Code Remedy

• Check the power point of the unit working accurately.
• Check the gas supply working correctly.
• Turn the hot water tap On & Off.

When you get ‘Error Code 58’ on your Rinnai water heater, then it indicates secondary heat exchanger sensor fault.

Before commencing any Diagnostic Procedure – Turn off the power source to a unit. Turn off the gas supply.

• Code displays when one of the two bi-metals opens at the back of the secondary heat exchanger.
• Inspect and test sensor.
• Check voltage.
• Inspect wiring harness electrical connections.
• Ensure there aren’t any loose, broken, or damaged connections at the sensor wiring harness.
• Check and clean heat exchanger for any debris-particles and insects, and flush system clean.
• Inspect for scale accumulation on the heat exchanger and flush if required.
• Apply hard water to protect from scale accumulation in the future.

How to resolve an ‘Error Code 58’ on my Rinnai Water Heating System?

It’s better to call in the experts to resolve error code 58 displayed on your Rinnai hot water system. Without any delay, get in touch with Sydney Plumbing on 0402 487 444, our qualified and expert technicians can promptly resolve your Rinnai hot water system error code and help you get back on your routine.

When you get ‘Error Code 61’ on your Rinnai water heater, then it signals combustion fan motor malfunctioning or defective.

Before commencing any Diagnostic Procedure – Turn off the power source to a unit. Turn off the gas supply.

• Check wiring harness.
• Check fan speed revolution.
• Inspect the airflow.
• Check for any internal damages.
• Ensure there aren’t any loose, broken, or damaged connections on fan motor wiring harness.
• Remove the fan motor and inspect the blower wheel, to make sure it turns freely.
• Inspect the fan shell for any barriers. Measure fan motor rolling resistance.
• If windings within specs, change PC board.
• If windings unfastened, change the motor.

How to resolve an ‘Error Code 61’ on my Rinnai Water Heating System?

Resolving the error code that appears on your Rinnai hot water system demands the expertise of qualified and practised technicians! To book a service, call Sydney Plumbing on 0402 487 444, our experienced and equipped technician can resolve your Rinnai water heating unit’s error code and help you to enjoy your hot water showers.

When you get ‘Error Code 65’ on your Rinnai water heater, then it indicates water-flow control abnormality.

Before commencing any Diagnostic Procedure – Turn off the power source to a unit. Turn off the gas supply.

• Inspect internal water valve controller.
• Check water-flow kPa pressure.
• Make sure there aren’t any loose, broken, or damaged connections on the water-flow servo.
• Switch off the power to the unit and then switch it on again, and check if the code goes away.
• If you see the code coming back, then place a service call for an expert technician.

How to resolve an ‘Error Code 65’ on my Rinnai Water Heating System?

Book a service to resolve the error code appearing on your Rinnai water heating system. Call Sydney Plumbing on 0402 487 444, and our equipped and expert technician will quickly fix your Rinnai hot water system’s error code and get you back up and running in no time.

When you get ‘Error Code 70’ on your Rinnai hot water system, then it signals fault with PCB board.

Before commencing any Diagnostic Procedure – Turn off the power source to a unit. Turn off the gas supply.

• Fault with the PCB board.
• Make sure there aren’t any loose, broken, or damaged connections on the PCB board.
• Ensure dip switches set appropriately.
• You will need to replace the PCB board, which is something that should only be done by qualified and experienced technicians.

How to resolve an ‘Error Code 70’ on my Rinnai Water Heating System?

Calling in a qualified and expert technician is highly recommended to safely replace the PCB board and do the needful to resolve the error code, and get your Rinnai water heating unit to start functioning efficiently all over again! Contact Sydney Plumbing on 0402 487 444 to book a service!

Solenoid Valve Circuit fault

Error Code Remedy

• Inspect the resistance power of each solenoid valve coil.
• Check the wiring harness of all solenoid for loose connections.

Flame Sensing Device Error

Error Code Remedy

• Replace the flame rod.
• Make sure the flame rod is contacting the flame when unit fires.
• Remove flame rod and check for carbon build-up. If found then clean it with sand paper.

Fault in Burner Sensor Circuit

Error Code Remedy

• Change the sensor.
• Inspect sensor wiring and PC board for loose connection.

When you get ‘Error Code 79’ on your Rinnai hot water system, then it indicates water leak detection.

Before commencing any Diagnostic Procedure – Turn off the power source to a unit. Turn off the gas supply.

• Water leak has detected.
• Water leak on connections o-rings gaskets.
• Check water inlet manifold.
• Make sure there aren’t any loose, broken, or damaged connections on the leak detector.
• Inspect the heat exchanger and all piping for leaks.
• If you can’t spot any leaks, wipe-out water that is inside the cabinet, dry out the leak sensor, and restart the system.
• If the error code comes up again, then disconnect the sensor and start the water heater.
• If the system runs without the sensor, then you need to replace the sensor and the screw.

How to resolve an ‘Error Code 79’ on my Rinnai Water Heating System?

Resolving error code 79 involves technical troubleshooting, so its best to call in an experienced technician. To book a service, call Sydney Plumbing on 0402 487 444, and we will send a qualified and expert technician to resolve your Rinnai hot water system’s error code and help you get back on the routine in no time.