Rheem water heater codes
A gas tank water heater reports its fault as a count of LED flashes on the gas control valve, seen through the small window or viewport near the base of the tank. Count the flashes, note the pause (usually three seconds) and watch a second full round before you decide which code it is. Some controls use two groups, such as six flashes then one.
All 14 codes
1 FlashLow flame signal (pro repair)2 FlashesFlue damper switch closed (pro repair)3 FlashesFlue damper switch open (pro repair)4 FlashesThermal cutoff device tripped (pro repair)5 FlashesNo flame sense (pro repair)6-1 FlashesUnit failed to light (pro repair)6-2 FlashesFlue damper switch opened (pro repair)6-3 FlashesFlame lost (pro repair)6-4 FlashesFlame sense out of sequence (pro repair)7 FlashesFlammable vapors detected (pro repair)8-1 FlashesFlammable vapor sensor fault (pro repair)8-2 FlashesEnergy cutoff device fault (pro repair)8-3 FlashesElectronics circuit fault (pro repair)8-4 FlashesGas control fault (pro repair)
About Rheem codes
Rheem makes gas furnaces, tank water heaters and tankless water heaters, and each line reports faults differently: status LED flash counts on furnaces and tank gas controls, numeric codes on tankless units. Use the table for the product family on your rating plate. Check the model label on your unit before using any chart.