Beyond any doubt, the Rheem tankless water heater is the wisest investment that delivers hot water on demand with an ultimate warranty for 20+ years. Though Rheem boasts 96% efficiency on its models, it still needs far less in the way of maintenance. Otherwise, it’s obvious for the users to encounter … Read More

Rheem tankless water heater code P1 is the error indication of the too-low water flow in the system. In general, a tankless water heater will operate and activate the burner with a minimum flow rate of 0.4 gallons per minute.  If you’re experiencing error code P1, it means that your … Read More

Rheem tankless water heater code 76 refers to a potential communication fault between the temperature controller and the water heater.  Before considering anything else, make sure the wiring connection between the water heater and the remote controller is in good working order. In case multiple remote controllers are installed, confirm … Read More

Rheem tankless water heater code 61 is the clear error indication of the malfunctioning blower motor of the system. The blower motor is not speedy enough to allow proper combustion. Various factors are contributing to the blower motor malfunction that isn’t running freely. Either the blower assembly is clogged with … Read More

Rheem tankless water heater code 99 is the error indication that the fan motor isn’t creating enough ventilation. The ventilation system has successfully passed the pre-purge but has failed during normal operation.  If your Rheem displays error code 99, here are the possible reasons to check for: As an obvious … Read More

Rheem tankless water heater code 29 is the error, indicating that the heat exchanger outlet temperature is too low. This’ll only apply to the Mid-efficiency models. Besides, when there is an abnormality with the neutralizer water level electrode on your Rheem high-efficiency models, you’ll see error Code 29 on the … Read More

Rheem tankless water heater code 14 is the error signalling to you that the overheat limiter has failed or the water heater has overheated and stopped working. In the high-efficiency model, error 14 tells you about a tripped high-limit switch due to the rising temperature of the unit.  The major … Read More

Rheem tankless water heater code 13 is mainly the error indication of incomplete combustion in the system due to a dirty or broken flame sensor. Apart from this, the error can be caused by a variety of reasons. Like: When the Rheem error code 13 triggers, inspect the flame rod … Read More

Rheem tankless water heater error code 12 is diagnostic information from the controller indicating flame failure in the system. This is caused by a variety of factors, including: Whenever you see this error code, inspect the flame sensor rod for carbon build-up. If so, clean and adjust it properly. Next, … Read More

We know how much it’s frustrating for some users to set the Rheem tankless water heater temperature above the default setting. That’s the point we’re here for you with an effective guide on how to set Rheem tankless water heater to 140. To adjust the temperature at 140 degrees F: … Read More