The Rheem water heater family uses reset buttons to protect the system from overheating or electrical faults. Knowing where these buttons are and how to reset them safely can save time and prevent unnecessary service calls. This guide explains common reset button locations for Rheem electric and gas models, how to perform a safe reset, and indicators that suggest professional service is needed.

Electric Rheem Water Heaters: Reset Button Location

Electric Rheem models typically have two reset buttons, one for the upper thermostat and one for the lower thermostat. These buttons are usually red and located behind the access panel on the side of the tank. To access them, turn off power at the circuit breaker, remove the front panel cover and insulation, and locate the rectangular reset buttons labeled “Reset” near the top and/or bottom thermostat assemblies.

Step-by-step for electric units:

Turn off power at the main breaker to the heater.
Open the access panel and remove insulation to reveal the thermostat area.
Look for two red buttons labeled Reset near the upper and lower thermostats.
Press and hold the button for a few seconds until you hear a click.
Replace insulation and panel, then restore power at the breaker.
Run hot water at a faucet to verify normal operation.

If the upper thermostat reset does not depress or the unit trips again, there may be a longer-term fault such as a defective thermostat, high-limit switch, or heating element issue. In such cases, consult a licensed plumber or electrician to diagnose and repair the system.

Gas Rheem Water Heaters: Reset Button Location

Gas Rheem models typically do not have a standard “Reset” button for the entire system like electric units. Instead, they may include a diagnostic reset button for the electronic control board or a high-temperature limit switch in the burner assembly area. Access to these components generally requires removing the front panel and, in some cases, the outer shell. If your gas Rheem heater lists a reset button, it will usually be located near the burner assembly or on the control panel inside the furnace-style access area.

Important safety note: For gas models, if you smell gas or detect a strong gas odor, leave the area immediately and contact the gas company or emergency services. Do not attempt resets in those conditions. Only perform resets after ensuring there is no gas smell and that power is shut off if you are comfortable and it’s safe to do so.

Common gas model steps (only if you are confident and safe):

Turn off the gas supply and power to the unit if you know how to do so safely.
Remove the front panel to access the control area.
Look for a reset or diagnostic button on the control board or near the burner assembly.
Follow the manufacturer’s instructions to reset, which may involve pressing and releasing the button or pressing and holding for a duration.
Restore power and gas supply, then test hot water from several fixtures.

If the gas heater repeatedly trips or does not produce hot water after a reset, the issue could be a faulty thermocouple, gas valve, improper venting, or a dirty burner. A licensed technician should inspect and service gas heaters to ensure safe operation.

How To Reset Safely And Effectively

Follow these safety-focused steps to reduce risk during a reset:

Always turn off power at the circuit breaker before touching electrical components.
Use dry hands and stand on a dry surface when working on an electric unit.
Do not bypass safety devices. The reset button is a protection mechanism, not a fix for underlying problems.
After a reset, run hot water from a faucet to confirm operation and monitor the system for any repeating trips.
If there is any abnormal smell, noise, or water leakage, stop and call a professional.

Troubleshooting Indicators: When A Reset Isn’t Enough

A reset should restore normal operation only if the underlying cause is temporary or minor. Indicators that require professional diagnosis include:

Repeated tripping of the thermal cutoff or a fast trip after resetting.
In electric models, one or both thermostats feel unusually hot or the upper element remains cold after reset.
Water temperature is inconsistent or water is not heating to setpoint.
Persistent leaks around the tank or fittings, or signs of mineral buildup in hard-water areas.

In such cases, a professional plumber or HVAC technician can test electrical connections, inspect heating elements, verify thermostat readings, and check for improper venting on gas models.

Maintenance Tips To Minimize Future Reset Triggers

Regular maintenance can reduce the need for resets and extend the life of a Rheem water heater. Consider these practices:

Annual inspection of electrical connections and thermostat calibration for electric models.
Flushing the tank yearly or as recommended by the manufacturer to remove sediment that can insulate elements and cause overheating.
Testing the T&P relief valve to ensure it operates freely and does not leak, following the manufacturer’s procedure.
Verifying proper venting and clearances for gas models to prevent combustion-related safety issues.
Using a water softener or annual descaling if mineral buildup is common in the area.

When To Call A Pro

If a reset does not resolve the heating issue after one or two attempts, or if the unit trips again shortly after a reset, seek professional service. Tripping may indicate a failing thermostat, heating element, gas control valve, or control board problem. For gas heaters, any sign of gas odor or improper ignition warrants immediate professional intervention.