• Ensure the ON/OFF switch at the bottom of the water heater is in the ON position.
• Ensure the 2 “D” batteries are in working condition and inserted properly in the correct position. If using the 12-volt feature for ignition, ensure the 12-volt accessory is connected properly on both ends (water heater and 12-volt power source). Ensure the 12-volt power source (e.g. 12-volt battery) is not depleted and working properly.
• Ensure the incoming water hose is connected to the water inlet of the water heater and the outgoing water hose (shower set) is connected to the water outlet. The water heater will not ignite if the connections are reversed.
• Check for debris in the water heater’s water inlet. The presence of debris in the water inlet screen may affect the incoming water pressure, which could prevent the flame from igniting.
• Verify the water pressure. The primary cause of non-ignition is insufficient water pressure. The water heater requires a minimum of 10 PSI of sustained water pressure to ignite the burner. Municipal water pressure is commonly rated at 60 PSI while most water pumps are rated at 40-60 PSI.
• If using a water pump for water pressure, try connecting the water heater to municipal water instead. Water pumps can sometimes provide mixed results based on the specifications and the connection configuration between the pump and water heater. Connecting the water heater to a different water source is the best way to determine if the problem is due to a configuration issue or a defective water heater.
• Check for any possible disconnected wires inside the water heater, which can sometimes occur during shipping. If a wire is disconnected, there will be no audible clicking sound from the ignition pins. To check the wires, ensure the gas supply is turned off, pull off the gas and water regulator knobs, and remove the screws holding the front panel in place. Remove the front panel and locate the disconnected wires toward the bottom of the water heater.

The ignition controller may be defective.

For further support, please contact Onsen at: support@onsenproducts.com or +1800-996-5559.

• Ensure the propane tank is not depleted.
• Check for debris in the water heater’s gas inlet and the opening of the gas regulator hose connected to the inlet. The presence of debris may prevent gas from flowing normally into the water heater.

The solenoid may be defective. For further support, please contact Onsen at: support@onsenproducts.com or +1800-996-5559.

• The water temperature sensor may be defective. For further support, please contact Onsen at support@onsenproducts.com or +1800-996-5559.

• The water heater is equipped with a water temperature sensor that, for safety purposes, will turn off the flame when 60°C is reached. To restart the water heater, turn the showerhead to the OFF position to stop the water from flowing, and then turn the shower head to the ON position to reactivate water flow. The unit will restart normally.
• In high wind environments, the flame may be extinguished by wind entering the casing. Test the water heater in an area with little to no wind.
• Verify the water heater is connected to a sustained 10-80 PSI water pressure source. Sudden drops in water pressure by a water pump or municipal water source may cause the flame to be extinguished. Test the water heater by connecting to an alternate water source. If the water heater operates normally then, it means that the irregular water pressure in the previous setup was at fault.
• Sustained water pressure may be affected when a water pump is used for two applications simultaneously (e.g. cold water line and hot water line via the water heater), splitting the pressure output in half. In that case, the water pressure may not be sufficient for ignition to occur. Test by connecting the pump to the water heater ONLY. If the water heater operates normally then, it means that the insufficient water pressure in the previous setup was at fault.