Rheem Water Heater Has No Status Light
On this page (6 sections)
The Short Answer: On a Rheem atmospheric gas water heater, a status light that is off means the control is off, the pilot isn’t lit, or the thermopile isn’t producing enough power. A solid light means the pilot recently went out and the thermopile is cooling. Wait, then relight the pilot following the label. If it won’t light or stay lit, call a technician.
Off, solid, or blinking?
Rheem’s atmospheric heaters have no power cord. The gas control runs on power from a thermopile heated by the pilot flame, so the light depends entirely on the pilot. Rheem’s Use & Care manual (opens in a new tab) explains:
| What the light does | Rheem’s explanation | Next step |
|---|---|---|
| Off | Control off, pilot not lit, or not enough millivolts | Check the knob and gas supply, then relight per the label |
| Solid (steady) | Pilot recently went out and the thermopile is cooling, or the knob was just turned to OFF | Wait, then relight |
| 1 blue flash every 3 seconds | Normal | No action |
| Red flashes | A specific fault | Count them; see the label or Rheem gas control or valve failure |
The label on the heater also says that if the light isn’t blinking blue, relight the pilot.
Why the pilot went out
Once it is relit, the pilot should stay on. If it keeps going out, common reasons are:
- the gas supply was interrupted, or a propane tank ran low;
- lint or dust is blocking the air intake at the base;
- drafts are blowing the pilot out;
- the thermopile or its connection is weak (you may see 2 red flashes before it goes dark);
- a safety device has tripped.
See Rheem water heater pilot light won’t stay lit for more on each.
Power-vent and electric Rheem heaters
Power-vent models (blower on top, power cord) have an electronic control that needs 120-volt power. If its light is dark, check that the heater is plugged in, the outlet works, and the breaker is on. These controls report faults by flash count. See Rheem pressure switch failed open for one common code.
Electric models don’t use a gas control. If your electric Rheem has a display or indicator light and it’s dark, the first suspect is power: a tripped breaker, or a double-pole breaker with one side tripped. Reset it once; if it trips again, leave it off. For a heat pump model, see Rheem heat pump water heater problems.
What you can check safely
- Confirm the gas supply valve is open and other gas appliances work.
- Check that the control knob isn’t set to OFF.
- If the light is solid, wait for it to go out before relighting.
- Relight once using the instructions on the heater’s label.
- Keep the area around the base clean and free of stored items and flammable products.
What the technician will check
A technician will confirm gas supply and pressure, check the igniter and pilot flame, and measure the thermopile’s output and connection. If the pilot lights well and the thermopile output is good but the light stays dark, they will test and, if needed, replace the gas control.
Frequently Asked Questions
Q: Is it normal for the light to be off when the burner isn’t running? A: No. On Rheem atmospheric heaters the light flashes blue once every three seconds whenever the pilot is lit, even when the burner is off.
Q: The pilot is lit but the light is dark. What does that mean? A: The thermopile may not be producing enough power, its connection may be poor, or the control may have failed. A technician can measure the thermopile to tell which.
Manuals and supporting references
These links distinguish general safety information from model-specific documentation. A manual directory helps you locate your unit’s instructions; it does not establish that every model uses the same parts, codes, or test values.
- Rheem: gas water heater Use & Care manual AP23698 (status light codes) (opens in a new tab)Rheem atmospheric natural gas and LP storage heaters (29 to 55 gallons) covered by AP23698.
- Rheem: owner help and support (opens in a new tab)Identify the applicable model instructions or contact Rheem support.
- PG&E: recognizing and responding to a gas leak (opens in a new tab)Emergency actions for suspected fuel-gas leaks.
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