To light a Rheem hot water heater, turn the gas valve to the “pilot” position, press and hold the pilot button, then use a long lighter or match to ignite the pilot flame while continuing to hold the button for about 30 seconds before releasing it, ensuring the flame remains lit, and finally turn the gas valve to the “on” position.
Relighting your Rheem water heater’s pilot light is essential when you suddenly lose hot water. This guide provides detailed instructions for both standard and 4-star Rheem models, plus troubleshooting tips to keep your system running smoothly.
Safety Precautions Before Lighting
Always follow these safety measures when working with gas appliances:
- Turn off all flammable materials in the area
- Ensure proper ventilation around the water heater
- Check for gas leaks using soapy water on connections
- Keep a fire extinguisher nearby
If you smell gas strongly, evacuate immediately and call your gas company. For general maintenance, learn about Rheem hot water heater anode replacement to extend your unit’s lifespan.
Step-by-Step Lighting Instructions
1. Prepare the Unit
Rotate the temperature dial counter-clockwise to the lowest setting. Wait 5 minutes for any residual gas to dissipate.
2. Access the Control Panel
Remove the outer door panel to reveal the gas control valve and ignition components.
3. Set Gas Valve to Pilot
Turn the gas knob clockwise to the “Pilot” position. You’ll feel resistance when reaching the correct position.
4. Initiate Gas Flow
Press and hold the red button to the left of the gas knob. This starts gas flow to the pilot assembly.
5. Ignite the Pilot
While holding the red button, press the piezo ignitor button repeatedly until the pilot lights. View the flame through the sight glass.
6. Confirm Ignition
Continue holding the red button for 60 seconds after ignition to ensure the thermocouple heats properly.
7. Activate Main Burner
Turn the gas knob to “On” and set your desired temperature (typically 120°F for optimal efficiency).
Troubleshooting Common Issues
| Problem | Solution |
|---|---|
| Pilot won’t stay lit | Check thermocouple connection or replace if faulty |
| No spark from ignitor | Clean electrode or replace piezo ignitor |
| Gas smell persists | Shut off gas immediately and call a professional |
For more complex issues, our guide on troubleshooting propane heaters shares principles that apply to gas water heaters too.
Rheem 4-Star Models Special Instructions
Newer Rheem 4-Star models feature an electronic ignition system:
- Turn gas knob to “Pilot” position
- Press and hold the ignition button for 30 seconds
- The control module will automatically spark the ignitor
- Once lit, turn knob to “On” position
Maintenance Tips to Prevent Future Issues
Regular maintenance reduces pilot light failures:
- Clean the burner assembly annually
- Inspect the flue for obstructions
- Test the pressure relief valve every 6 months
- Consider a water heater blanket in cold climates
According to Rheem’s official documentation, most pilot light issues stem from dirty components or drafty installation locations. Ensure your water heater meets all local venting requirements.
When to Call a Professional
Contact a licensed technician if you experience:
- Persistent gas odors
- Yellow or flickering flames (should be steady blue)
- Water leaks around the base
- Unusual noises during operation
For those considering upgrades, compare Bradford White vs Rheem water heaters to make an informed decision about replacement options.
