The Lochinvar water heater is a reliable option for domestic hot water, but like any appliance, it can require a reset when a fault occurs. This guide explains what the reset button does, where to find it on common Lochinvar models, and how to reset safely. It covers troubleshooting steps, warning signs, and when to call a professional. Understanding the reset process helps homeowners address minor faults quickly while recognizing when professional service is necessary.

What The Reset Button Does On Lochinvar Water Heaters

The reset button on a Lochinvar water heater is a safety feature tied to the control system. It typically engages after a fault such as an overheat condition, flame sensing error, or a lockout in the ignition sequence. Pressing the reset button restarts the burner control after the fault has been addressed. It is not a cure for all problems; persistent faults require inspection by a qualified technician to prevent damage or unsafe operation.

Where To Locate The Reset Button

Location varies by model and series, but most Lochinvar water heaters place the reset button on or near the control panel or access area of the unit. Common locations include behind a service panel at the front of the unit, near the thermostat housing, or along the top edge of the blower compartment in vented systems. If the unit has a digital display, the reset may be labeled as “Reset,” “Rst,” or represented by a dedicated reset icon. Always consult the owner’s manual for exact placement and safety instructions specific to the model.

When To Use The Reset Button

Use the reset button after a fault light or fault code indicates a temporary condition. Typical scenarios include:

Overheat lockout: The burner shuts down to prevent scalding or pressure buildup.
Ignition failure: The gas ignition sequence fails to establish a flame.
Flame sensor trouble: The flame is detected as absent or unstable.
Water temperature anomalies: The system detects out-of-range temperatures beyond safe limits.

Before pressing reset, ensure there is no ongoing safety risk. If you smell gas, hear hissing, or notice a burning odor, evacuate and call professionals rather than attempting a reset.

Step-By-Step Reset Procedure

Follow these general steps to reset a Lochinvar water heater. Note that exact steps can vary by model, so refer to the manual for model-specific instructions:

Turn off the power to the unit at the service switch or circuit breaker for 30 seconds, then restore power to clear transient faults.
Look for the reset button on the control panel. If the unit has a touchscreen or digital interface, navigate to the fault or diagnostics screen to initiate a reset.
Press and hold the reset button or select the reset option as directed by the display for a few seconds until you see a confirmation or the fault indicator clears.
Return the unit to normal operation by setting the thermostat to the desired temperature and ensuring the flame is reigniting.
Observe the unit for a few minutes to confirm stable operation. If the fault recurs, do not repeatedly reset; instead, note any error codes and contact a professional.

Interpreting Fault Codes And Indicators

Lochinvar units often display fault codes on a digital panel or LED indicators. Common indicators include:

Flame sensor fault or ignition lockout codes indicating ignition failure.
Overheat or high limit codes signaling that the water temperature exceeded safe limits.
Pressure or flow-related codes suggesting insufficient water flow or gas pressure issues.

Record the fault code, time of occurrence, and any accompanying sounds or smells. This information helps service technicians diagnose root causes more efficiently.

Safety Considerations And Best Practices

Resetting a water heater should be done with attention to safety. Key practices include:

Always verify there are no gas leaks or strong gas odors before handling the unit.
Never bypass safety devices or repeatedly reset a unit that continually faults.
Turn off electrical power before opening service panels to avoid shock.
Follow the manufacturer’s instructions for model-specific reset procedures and limits.

If the unit shows signs of wear, corrosion, leaking connections, or persistent heating problems, discontinue use and contact a licensed plumber or gas technician.

What To Do If Resetting Doesn’t Solve The Issue

If the reset does not restore operation or the fault recurs within a short period, take these steps:

Check for obvious causes such as pilot or ignition issues, gas supply, or water supply problems.
Inspect the venting system for blockages or improper installation, which can trigger flame failure or overheat conditions.
Examine wiring connections for loose or damaged wires at the control board and thermostat.
Review recent maintenance or service work that may have disrupted safety components.

Persistent or recurrent faults require a service visit from a qualified Lochinvar technician. They can perform diagnostics, clean or replace sensors, verify gas pressure, and ensure venting and combustion are within spec.

Maintenance Tips To Reduce Reset Occurrences

Proactive maintenance can reduce the frequency of resets and extend the life of a Lochinvar water heater. Consider these practices:

Schedule annual professional inspections to inspect burners, igniters, flame sensors, and electrical connections.
Keep the venting system clear of debris and confirm there are no obstructions that could affect combustion air.
Regularly test the thermostat and temperature settings to ensure accurate readings and prevent overheating.
Drain and flush the tank periodically if recommended by the manufacturer to remove mineral buildup that can affect heat transfer.

Common Mistakes To Avoid

Avoid these pitfalls that can complicate reset procedures or mask underlying issues:

Over-relying on the reset button without addressing root causes like gas supply or venting problems.
Resetting too frequently, which may indicate an ongoing fault requiring professional service.
Ignoring safety warnings or bypassing protective devices to force operation.

Additional Resources

For model-specific instructions, always consult the Lochinvar owner’s manual or the Lochinvar official website. Contact a licensed plumber or gas technician for complex concerns, including gas leaks, flame rollout, or suspected electrical faults. The manual typically provides troubleshooting tables, error code lists, and safety precautions tailored to each model line.