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how to reset furnace circuit breaker?

By:Quisure Updated:May 20,2023 08:31AM

This comprehensive guide will walk you through how to reset your furnace's circuit breaker, to help get your heating system back up and running in the event of an unexpected power outage or a trip.

Table of Contents

1. Understanding Furnace Circuit Breakers

The furnace circuit breaker is a crucial safety feature of your heating system. It protects the furnace from potential electrical damage by tripping and cutting off the power when it detects an overcurrent or short circuit situation. Resetting a tripped circuit breaker is a straightforward process, but understanding why it tripped is essential to prevent further issues.

2. When to Reset Your Furnace Circuit Breaker

It’s important to reset your furnace circuit breaker when your furnace is not producing heat or the fan is not blowing. But, remember that the breaker generally trips for a reason, such as an overloaded circuit, a short circuit, or a ground fault. So, before you reset the breaker, try to understand what might have caused it to trip in the first place.

3. Step-By-Step Guide to Resetting Your Furnace Circuit Breaker

  1. Locate your home's electrical service panel. This is typically a gray metal box located in a utility area, such as a basement, laundry room, or garage.

  2. Open the panel door to access the circuit breakers.

  3. Find the breaker that controls the furnace. It might be labeled "Furnace" or "Heating System" on the panel directory.

  4. If the breaker is in the "OFF" position or in the middle, indicating it has tripped, switch it to the "OFF" position and then back to the "ON" position. This is how you reset the breaker.

  5. Return to your furnace and check if it's working now.

4. Tips to Avoid Tripping the Furnace Circuit Breaker

There are several ways you can help prevent your furnace circuit breaker from tripping frequently:

  • Maintain your furnace regularly. This includes cleaning or replacing filters, ensuring proper ventilation, and getting annual professional tune-ups.

  • Don't overload the circuit that your furnace is on. If there are other large appliances on the same circuit, consider moving them to a different one.

  • Replace old or worn-out circuit breakers. Breakers can wear out over time and trip more frequently, even when there's no real issue. If your breaker is old or trips frequently, it may be time to replace it.

5. When to Call a Professional

Although resetting a circuit breaker is a relatively simple process, it's important to understand when it's time to call a professional. If your furnace circuit breaker trips frequently, it's usually a sign of a deeper issue that needs professional attention.

If you're dealing with any of the following situations, it's best to call a professional electrician or HVAC technician:

  • The breaker trips immediately after you reset it. This could indicate a short circuit, which can be dangerous to deal with without proper training and tools.

  • The breaker feels hot to the touch. This is a sign of a serious electrical issue that should be addressed by a professional.

  • The furnace still doesn't work after resetting the breaker. There may be a problem with the furnace itself, requiring a professional HVAC technician.


Resetting your furnace circuit breaker is a simple process that can help restore your heating system's function. However, frequent tripping could indicate a serious problem. If you're regularly resetting the breaker, or if it doesn't resolve your furnace issues, it's best to call a professional for a thorough inspection and necessary repairs.

Understanding when and how to reset your furnace circuit breaker is an essential aspect of maintaining a safe and comfortable home. By being mindful of the warning signs of potential issues, you can tackle problems early on and ensure your furnace operates efficiently throughout the colder months.

Stay tuned for more insightful posts to help you better understand and maintain your home's electrical systems!