How do you find the error code on a Rinnai?
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.
Why do I get an error code on my tankless water heater?
Unplug the heater for 30 seconds and then plug it back in. If the error code persists, call a licensed contractor. This error code involves a breakdown in communication between two tankless water heaters using the Quick Connect Cord. It can occur when more than one remote is hooked up to handle two Quick-Connected units.
How to reset code 7 Flash water heater?
7 flash error code reset help. Watch Now and hit the like button on the way out. This works for reset of other codes too. Thanks New water heater fail. Turn knob to very hot and back to low 7 times. Vapor lock code and other codes on side of tank. Ohms should say over 45,000 mine said 222,000 the store model had 85,000. So they vary.
Why is my water heater not turning on?
This indicates ignition failure in your tankless water heater. It means that your unit is not firing up to heat the water, a situation that can be caused by insufficient gas supply, insufficient airflow or debris on the ignition plug. After checking to see if the gas is turned on, call a licensed contractor.
What causes a code 73 error on a hot water heater?
Improper circuit board settings will cause a code 73 error. Changing a jumper connection or dip switch while power is supplied to the heater can trigger the problem, as can an improperly programmed circuit board. Unplug the heater for 30 seconds and then plug it back in. If the error code persists, call a licensed contractor.
What should I do if my water heater status light is not flashing?
Look at the Status Light on the gas control valve. If the Status Light is flashing more than once every three seconds or not flashing at all, select the appropriate code below. If the Status Light is flashing once every three seconds, the pilot light is lit and the gas control valve is working properly.
Unplug the heater for 30 seconds and then plug it back in. If the error code persists, call a licensed contractor. This error code involves a breakdown in communication between two tankless water heaters using the Quick Connect Cord. It can occur when more than one remote is hooked up to handle two Quick-Connected units.
What to do if your hot water heater is not working?
After checking each of these, if you still can’t find the reason why you have no hot water, it might be time to call a professional. If you have a gas heater, check to see if the gas valve is open.
Improper circuit board settings will cause a code 73 error. Changing a jumper connection or dip switch while power is supplied to the heater can trigger the problem, as can an improperly programmed circuit board. Unplug the heater for 30 seconds and then plug it back in. If the error code persists, call a licensed contractor.
