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Sometimes this issue can be fixed by simply restarting the unit. Rheem error code 66 indicates a problem with the water bypass control. Check the air inlet filter, clean it, and ensure the vent pipes are connected correctly. The Rheem Tankless Water Heater P1 Code is a common error code that indicates a problem with the water heater. window.mc4wp = window.mc4wp || { Try resetting the device, and if that doesnt fix the issue, its best to have a professional address the situation. Obstructions could also result in error code 14 though if you cannot find one then consult a professional to troubleshoot the fault. 90% of the time, this troubleshooting step will help to eliminate the warning message from the control panel. On the other hand, you should get a neutralizer kit and install it on your water heater if the neutralizer drainage fails. Rheem error codes 80 and 81 indicate a gas cut-off or extinction failure. Cycle your water heater two times by turning off- then turn on- at 10 seconds intervals. These are: Check the resistance readings of each sensor wiring and replace the sensors if not working correctly. In a worst case scenario, you may need to replace the control board. The flame rod wire should be connected and it should be free of any carbon build-up. However, even the best tankless water heaters sooner or later may stop working or be affected by other If you have a Rheem tankless water heater, you may have noticed a code 11 on the display. If the readings are not within specifications, you may be dealing with a faulty thermistor, which you should replace. Remove any blockage you see. The wiring for the flame rod may also be damaged, and the flame rod needs to have sufficient voltage. Rheem tankless water heaters provide water on demand. The water temperature on the remote control is set too high. There should also be gas to the unit with the valves fully turned on and the unit itself should have the correct gas volume and pressure which can be checked by a specialist. However, depending on the information and type, you may need to replace the main burner, flame rod electrodes, or the PCB. A communication error with the remote control can result in error code 76. Ensure the condensate flow is free of dirt, debris, and buildups. Clean the inlet filter if necessary. The neutralizer may need to be replaced and if it does then error codes 92 and 93 may be set off. He has a good standing reputation for superior skills in heating, air conditioning, hot water tanks, and indoor air quality systems. Water flow is below the minimum required. If there are air flow restrictions surrounding the unit or obstructions at the vent terminal then this could also result in an error code 34. If there is no remaining flame, you should check the display maintenance for information regarding the flame rod. If all seems good, the problem may be a faulty PCB. Tankless models need routine maintenance to ensure they remain energy efficient. 3 Common Causes (and How To, Troubleshooting Electrolux Dishwasher Error Codes, 5 Common Problems with Camplux Water Heaters. The heater might also make a noise to alert you to any issues. Remember, Rheem tankless models need routine maintenance to remain energy efficient.