Bryant Furnace Code 24: Troubleshooting Tips And Solutions

A Bryant Furnace Will Keep You Comfortable All Year Long
A Bryant Furnace Will Keep You Comfortable All Year Long from


If you own a Bryant furnace, you may have encountered the dreaded Code 24 error message. This error indicates that there is a problem with the furnace’s secondary voltage fuse. However, don’t panic just yet! In this article, we will provide you with some troubleshooting tips and solutions to help you resolve the Code 24 error on your Bryant furnace.

Understanding Code 24

Code 24 on a Bryant furnace signifies that the secondary voltage fuse has opened. This fuse is an important safety feature that protects the furnace’s control board from power surges. When the fuse opens, it cuts off power to the control board, causing the furnace to shut down.

Troubleshooting Step 1: Check the Fuse

The first step in troubleshooting Code 24 is to locate the secondary voltage fuse. It is typically located on the control board inside the furnace. Remove the furnace cover and visually inspect the fuse for any signs of damage or a blown fuse. If the fuse appears to be blown, replace it with a new one of the same amperage rating.

Troubleshooting Step 2: Inspect Wiring

If the fuse is not blown, the next step is to inspect the wiring connected to the fuse and the control board. Look for any loose or damaged wires that may be causing a short circuit. Tighten any loose connections and replace any damaged wires as needed.

Troubleshooting Step 3: Check for Faulty Components

If the fuse and wiring are in good condition, the next step is to check for faulty components that may be causing the Code 24 error. Start by disconnecting the power to the furnace and testing the various components, such as the pressure switch, igniter, flame sensor, and limit switches. Replace any faulty components that are causing the error.

Troubleshooting Step 4: Call a Professional

If you have followed the above steps and are still experiencing the Code 24 error on your Bryant furnace, it is recommended to call a professional HVAC technician. They have the expertise and specialized tools to diagnose and resolve complex furnace issues. Trying to fix the problem yourself may result in further damage or void your warranty.

Preventing Future Code 24 Errors

Once you have resolved the Code 24 error on your Bryant furnace, there are a few preventative measures you can take to avoid future occurrences:

Regular Maintenance

Schedule regular maintenance checks for your furnace to ensure that all components are in good working condition. This will help identify and address any potential issues before they escalate into major problems.

Clean and Replace Air Filters

Clean or replace the air filters in your furnace regularly. Clogged or dirty filters can restrict airflow and put unnecessary strain on the system, potentially leading to overheating and fuse blowouts.

Keep the Area Around the Furnace Clear

Ensure that the area around your furnace is clear of any obstructions. Blocked vents or cluttered spaces can restrict airflow and cause the furnace to overheat, triggering the Code 24 error.


Dealing with a Code 24 error on your Bryant furnace can be frustrating, but with the right troubleshooting steps, you can resolve the issue and get your furnace up and running again. Remember to prioritize safety and consult a professional if needed. By taking preventative measures, you can minimize the chances of encountering the Code 24 error in the future.