Intertherm furnaces are common in American homes, including manufactured housing. When a fault occurs, the system may lock out and a reset button on the Intertherm furnace can be pressed to restart the sequence. Understanding where to locate the reset button, how to reset safely, and what to check if the problem persists helps homeowners avoid unnecessary service calls. This guide covers practical steps, safety precautions, and maintenance tips to reduce future disruptions.
Where To Find The Intertherm Furnace Reset Button
Gas-Fired Intertherm Furnaces
On most gas-fired Intertherm furnaces, the reset button is a small red pushbutton located on the gas valve assembly at the burner compartment. Some units place it behind the service panel near the blower. If you can see the gas valve, look for a round red button labeled Reset. The button is often recessed; you may need a small tool or finger to press it. If the panel is difficult to access, consult the owner’s manual or contact a licensed HVAC technician.
Electric Intertherm Furnaces
Electric furnaces in the Intertherm line generally rely on a control board and a separate safety switch rather than a traditional reset button. Some models offer a “system reset” switch on the control panel, or require a full power cycle. If unsure, check the model sheet or manual for the exact procedure.
How To Safely Reset An Intertherm Furnace
- Turn off power at the furnace switch and, if accessible, at the main service panel. Also switch off the thermostat to ensure no signals are sent during the reset.
- If a gas supply shutoff is readily accessible and you feel safe doing so, turn the gas valve to the OFF position. Do not attempt to shut off gas if you are unsure of the procedure.
- Wait 5–10 minutes to allow residual gas to clear and the control board to reset.
- Locate the reset button. For gas models, it is typically on the gas valve assembly near the burner or on the blower housing; for other models, refer to the manual for the precise location.
- Press and release the reset button firmly. A noticeable click indicates a successful reset. If there is no click or the button trips immediately, stop and seek professional assistance.
- Restore power to the furnace and thermostat. Set the thermostat to heat and a comfortable temperature. The furnace should attempt to relight; you may hear ignition followed by fan operation.
- Monitor the start-up. If the burners light and run normally for a period, the Intertherm Furnace Reset Button cycle may have cleared. If you hear abnormal cracking, smell gas, or notice erratic operation, shut down power and call a technician.
Common Reasons An Intertherm Furnace Trips The Reset Button
- Dirty flame sensor or dirty burner, causing ignition or flame detection errors
- Blocked or restricted venting or exhaust, leading to safety shutoffs
- Gas pressure issues or a sticking gas valve
Key point: If any of these conditions are present, pressing the reset button may clear a temporary fault, but the underlying issue must be addressed to prevent repeated cycling.
Model Variations And Reset Button Differences
| Model Type | Typical Reset Button Location | Notes |
|---|---|---|
| Gas-Fired Intertherm | On the gas valve assembly near the burner or on the blower housing | Red pushbutton labeled “Reset”; some models require service-panel access |
| Electric Intertherm | Usually no dedicated reset button; uses control board or disconnect switch | Check manual for system reset procedure |
| Hybrid or heat pump variants | Varies by model; may use a system reset sequence via thermostat | Refer to the model sheet |
Some Intertherm units rely on a power-cycle method rather than a dedicated reset button. If the manual for the exact model indicates a different procedure, follow it. Always confirm you are dealing with the correct equipment before attempting a reset.
What To Do If The Reset Button Trips Again
- Do not repeatedly press the reset button. Repeated cycling can cause additional wear or mask a serious fault.
- Turn off power and review basic maintenance items, such as the air filter and venting, before calling for service.
- Document symptoms: what triggered the lockout, whether the flame lit, any unusual odors, or error codes on the control board.
- Check for gas smells. If you detect gas, leave the area immediately and call the gas company or emergency services.
- Consult the manual for the exact fault codes and possible causes, and contact a licensed HVAC technician if the issue persists.
Maintenance Tips To Prevent Future Trips
- Replace air filters every 1–3 months to maintain proper airflow and reduce strain on the system.
- Inspect and clean the flame sensor and burners as recommended by the model’s manual. A dirty flame sensor commonly causes ignition failures.
- Ensure adequate air return and supply paths; clear obstructions around the furnace and vent termination.
- Inspect venting and exhaust pathways for restrictions or blockages that could trigger safety shutoffs.
- Schedule annual professional maintenance to check gas pressure, combustion efficiency, electrical connections, and safety switches.
- Install and maintain working carbon monoxide detectors near sleeping areas and the furnace room for safety.