Pilot Light Will Not Stay Lit
A standing pilot that repeatedly goes out needs model-specific service assessment. The cause can involve the pilot system, gas controls, safety devices, air conditions, or other equipment issues. It is not safe to assume every case needs the same small replacement part.
This page concerns water heaters with a standing pilot. Many modern heaters use electronic ignition and have no continuously burning pilot. Identify the equipment before following any relighting instructions.
The immediate safety decision
Safety: If you smell gas or suspect a leak, leave the area without operating switches, lighting a flame, or trying to locate the source. Call the gas utility or emergency services from a safe place. If a carbon-monoxide alarm sounds, immediately go outside, call emergency services, and stay out until responders permit reentry.
Gas-utility emergency guidance gives this priority. Contact your own utility for local assistance; an editorial website cannot assess a gas appliance remotely.
If no emergency condition is present, read the lighting label and the exact manufacturer’s manual. Use only the instructions for that heater. If the attempt fails, the pilot will not stay lit, or the problem recurs, stop and arrange qualified service. Repeated attempts are not a substitute for diagnosis.
Information that helps the technician
Record the model and serial number, visible status indication, when the pilot last worked, and whether failure followed maintenance, flooding, a supply interruption, or other changes. Explain whether the flame goes out during the lighting sequence or after the main burner runs. Do not dismantle the burner assembly to obtain that information.
| Information | Reason it matters |
|---|---|
| Exact model | Control and ignition designs vary |
| Status-light pattern | Interpretation is model-specific |
| Timing of failure | Helps distinguish operating conditions |
| Recent work or water exposure | Can change the investigation |
| Gas type | The equipment must match its approved fuel |
What belongs to professional diagnosis
A service technician should evaluate the applicable gas, ignition, sensing, control, and safety systems according to the manual. Do not bypass a thermal cutoff, hold a gas control open, alter a safety device, or change gas components to “test” the heater.
Rheem’s technical bulletin library includes standing-pilot troubleshooting and specific control instructions. The existence of those separate documents illustrates why a generic internet relighting sequence is inadequate.
Connect the repair to the broader decision
Ask the provider to explain the fault, the proposed repair, any warranty coverage, and whether the heater can return to safe operation. Get an itemized repair estimate, including diagnosis and labor.
If the tank is also leaking or multiple failures have accumulated, compare replacement. A recurring pilot fault does not by itself prove the tank needs replacement; the condition and diagnosis decide that. The installer guide helps evaluate a qualified gas-equipment service provider.
The CPSC carbon-monoxide alarm guidance explains evacuation and emergency response.