How to fix no ignition / no gas supply on Rinnai REU-A1620WB?
- Kkevin61Aug 13, 2025
If your Rinnai Water Heater isn't igniting or has no gas supply, verify that the gas is turned on at the water heater, gas meter, or cylinder.
How to fix no ignition / no gas supply on Rinnai REU-A1620WB?
If your Rinnai Water Heater isn't igniting or has no gas supply, verify that the gas is turned on at the water heater, gas meter, or cylinder.
What to do if power interruption during Bath fill in Rinnai REU-A1620WB?
If a power interruption occurs during a bath fill and water doesn't flow when power is restored to your Rinnai Water Heater, turn off all hot water taps and press the On/Off button twice.
What to do if Rinnai Water Heater water doesn't flow after a power interruption during bath fill?
If your Rinnai Water Heater experiences a power interruption while filling a bath and water doesn't flow when power is restored, turn off all hot water taps, then press the On/Off button twice.
What to do if there is a flame failure / low gas flow in my Rinnai REU-A1620WB?
If you experience a flame failure or low gas flow with your Rinnai Water Heater, first, ensure that the gas supply is turned on at both the water heater and the gas meter or cylinder. Then, check for any obstructions that might be blocking the flue outlet.
What to do if the wireless water controller is 'Out of Range' in Rinnai Water Heater?
If the wireless water controller (when fitted) is 'Out of Range' due to the distance from transceiver or an obstruction with your Rinnai Water Heater, try moving the wireless water controller or transceiver, or remove the obstruction.
What to do if incorrect dipswitch setting detected in Rinnai REU-A1620WB?
If an Incorrect Dipswitch Setting is Detected on your Rinnai Water Heater, the installer needs to check the Dipswitch Settings. It is recommended to schedule a service call.
Why does my Rinnai REU-A1620WB have flame failure or low gas flow?
If you are experiencing flame failure or low gas flow with your Rinnai Water Heater, verify that the gas is turned on at both the water heater and the gas meter or cylinder. Also, check for any obstructions to the flue outlet.
What causes a Rinnai Water Heater wireless controller to be out of range?
If fitted, a Rinnai Water Heater's wireless water controller might be ‘Out of Range’ because of the distance from the transceiver or an obstruction. To resolve this, try moving the wireless water controller or transceiver, or remove any obstructions.
Read the manual thoroughly for safe and correct use of the appliance.
Hazards of scalding water, especially for vulnerable groups.
Guidelines for safe operation, including child supervision and appliance handling.
Factory pre-set temperatures and authorized adjustments for max delivery temp.
User control of hot water temperature and priority settings for multiple controllers.
Step-by-step guide to operating the MC-601Q universal water controller.
Instructions on how to power on the water controller.
How to select and adjust the desired water temperature.
Explanation and operation of the Smartstart pre-heat function for faster hot water.
Details on how the preheat function works.
Step-by-step guide for activating and using the preheat function.
List of error codes with descriptions and potential remedies for faults.
Resolving issues when the appliance is operated without any water controllers.
Information on authorized service and repair by qualified personnel.
Guidelines for selecting the optimal placement of the water heater.
Managing hot water delivery temperature, including 50°C compliance.
Requirements for the location and clearances of the appliance flue terminal.
Critical factors for the correct installation of the neutraliser drain pipe.
Designating master/sub controllers and their temperature limits.
Detailed instructions for the physical installation of the MC-601Q controller.
Pre-connection checks and operational tests required before final commissioning.
Verifying and adjusting hot water delivery temperatures after installation.
Read the manual thoroughly for safe and correct use of the appliance.
Hazards of scalding water, especially for vulnerable groups.
Guidelines for safe operation, including child supervision and appliance handling.
Factory pre-set temperatures and authorized adjustments for max delivery temp.
User control of hot water temperature and priority settings for multiple controllers.
Step-by-step guide to operating the MC-601Q universal water controller.
Instructions on how to power on the water controller.
How to select and adjust the desired water temperature.
Explanation and operation of the Smartstart pre-heat function for faster hot water.
Details on how the preheat function works.
Step-by-step guide for activating and using the preheat function.
List of error codes with descriptions and potential remedies for faults.
Resolving issues when the appliance is operated without any water controllers.
Information on authorized service and repair by qualified personnel.
Guidelines for selecting the optimal placement of the water heater.
Managing hot water delivery temperature, including 50°C compliance.
Requirements for the location and clearances of the appliance flue terminal.
Critical factors for the correct installation of the neutraliser drain pipe.
Designating master/sub controllers and their temperature limits.
Detailed instructions for the physical installation of the MC-601Q controller.
Pre-connection checks and operational tests required before final commissioning.
Verifying and adjusting hot water delivery temperatures after installation.
| Category | Water Heater |
|---|---|
| Model | REU-A1620WB |
| Type | Tankless |
| Fuel Type | Gas |
| Gas Type | Natural Gas |
| Heating Capacity | 160, 000 BTU/h |
| Temperature Range | 98°F - 140°F |
| Energy Efficiency | 0.82 Energy Factor |
| Flow Rate | 6.6 GPM |
| Energy Factor | 0.82 |
| Maximum BTU | 160, 000 BTU/h |
| Ignition Type | Electronic |
| Warranty | 12 years heat exchanger, 5 years parts, 1 year labor |












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