Rheem tankless water heater code 12 indicates a problem with the flame sensor. To reset the code 12, clean the flame sensor or replace it.
![Rheem Tankless Water Heater Code 29 [How To Fix]](https://i.pinimg.com/originals/1d/fc/ab/1dfcaba8684382be2ba6abc1106dd91c.jpg)
![Rheem Tankless Water Heater Code 29 [How To Fix]](https://i.pinimg.com/originals/f1/bf/4d/f1bf4d567530681ca8c92c56b7cfa01b.jpg)
![Rheem Tankless Water Heater Code 29 [How To Fix]](https://i.pinimg.com/originals/12/ae/5c/12ae5c51a3976077f59ecaa82f0d21fe.jpg)
![Rheem Tankless Water Heater Code 29 [How To Fix]](https://i.pinimg.com/originals/d5/3d/b0/d53db02fd1c40708b828db656e39c366.jpg)
![Rheem Tankless Water Heater Code 29 [How To Fix]](https://i.pinimg.com/originals/7b/e8/79/7be879664aa2a72c33a403c5403d26b9.jpg)
![Rheem Tankless Water Heater Error Codes [The Complete Guide]](https://i.pinimg.com/originals/1a/7b/af/1a7baf7458fa00077b80a8453136c560.jpg)
![Rheem Tankless Water Heater Code 11 [No Ignition]](https://i.pinimg.com/originals/80/2c/c0/802cc08cdab976f5a1086916ec3226f4.jpg)
![Rheem Tankless Water Heater Code 29 [How To Fix]](https://i.pinimg.com/originals/08/89/b7/0889b7d5abfa8a64e1280c4483d864f7.jpg)
