Rheem Error Code 11: Rheem Code 11 - No Ignition
Warning: This error indicates a failure to ignite the gas, which could lead to a dangerous gas buildup. Shut down the unit immediately and call a qualified technician.
How to Fix Rheem Code 11
- Step 1: Ensure the gas supply to the unit is turned on. Check the shut-off valve on the gas line leading to the water heater.
- Step 2: Reset the unit by turning it off and then back on. See if the error clears. If it returns, do not continue to reset it.
- Step 3: Call a qualified HVAC technician or plumber to diagnose and repair the problem. Do not attempt to troubleshoot gas-related issues yourself.
How to Reset Rheem Code 11
- Turn off the unit using the power button on the front panel.
- Turn off the gas supply valve.
- Turn off the circuit breaker supplying power to the unit. Wait 30 seconds.
- Restore power at the breaker, then open the gas valve.
- Turn the unit back on. If the error returns, the underlying issue needs repair.
What does 11 mean?
Rheem error code 11 signals that your tankless water heater attempted to ignite the burner but failed. This means the unit went through its startup sequence, including the fan starting and the igniter sparking, but the main burner flame didn't establish itself. The water heater will typically try a few times before locking out on this error. This is a critical safety issue because unburned gas can accumulate, creating a risk of explosion or carbon monoxide poisoning. It's important to address this problem right away to ensure your safety and the proper operation of your water heater.
Affected Models
- R92V
- R92V
- R92E
- R92E
- R92E
- Rheem Classic Plus Series
- Rheem Classic Plus Series
- Rheem Classic 90 Plus
- Rheem Classic 80 Plus
- Rheem Prestige Series
- Rheem Classic Series
- Rheem Prestige Series
- Rheem Classic Series
- Rheem Classic Plus Series
- Rheem Classic Plus Series
- Rheem Prestige
- Rheem Classic
- Rheem Prestige Series
- Rheem Classic Series
- NCB
- NPE
- RNC
- RNG
- RNE
- Rheem Classic Series
- Rheem Classic Plus Series
- RNC
- RPB
- Rheem Prestige Series
- Rheem Classic Series
- RNC
- R801T
- R801T
- RH2T
- RP16
- RP16
- RTGH
- RGE
- Rheem Classic Plus Series
- Rheem Classic Plus Series
- Rheem Classic Series
- Rheem Classic Series
- Rheem Classic Plus Series
- Rheem Prestige Series
- Rheem Classic 80% Gas Furnace
- Rheem Prestige 95% Gas Furnace
- R92V
Replacement Parts
| Part | OEM Number | Est. Cost |
|---|---|---|
| Flame Sensor | AP14914 | — |
| Igniter | AP14838 | — |
| Gas Valve | — | — |
Related Codes on Same Models
| Code | Description | Severity |
|---|---|---|
| A001 | Ignition Failure | Warning |
| A003 | Abnormal Ignition | Warning |
| A004 | False Flame Detection | Warning |
| A008 | Exhaust Temperature High | Warning |
| A011 | No Flame Detected | Warning |
| A021 | Over-Temperature | Warning |
| A031 | Inlet Thermistor Open/Short | Warning |
| A041 | Outlet Thermistor Open/Short | Warning |
| A043 | Water Level Error | Warning |
| A051 | Fan Motor Abnormality | Warning |