The furnace control board is responsible for regulating the various parts of your furnace, such as the blower fan, gas valve, and igniter. In this blog post, we will guide you in Lennox control board replacement, the cost, and how to tell if your furnace control board is bad.
The average cost to replace a Lennox furnace control board is $225-$950. The part alone costs $75-$450, and the labor cost is $75-$150.
The cost of a Lennox control board replacement can vary depending on a few factors. The first factor is the type of furnace you have. Different furnaces require different types of control boards, and the cost will vary accordingly.
The second factor is the age of your furnace. If your furnace is older, finding a replacement control board may be more difficult, which could drive up the cost. Lastly, the cost will depend on where you purchase the replacement control board. If you buy the replacement control board from a Lennox dealer, you can expect to pay more than if you purchase it from a third-party supplier.
Where to buy a Lennox furnace control board?
You buy furnace control boards from the following:
- Online store (Amazon)
- Local HVAC service companies
- Furnace brand manufacturers.
How to Tell if a Lennox Furnace Control Board is Bad?
If your furnace is not working properly, it may be due to a faulty circuit board. Here are a few signs that your furnace circuit board may be bad:
- The furnace won’t turn on.
- The blower fan won’t turn off.
- The furnace cycles on and off frequently.
- The furnace is making strange noises.
How to Test and Check a Furnace Control Board
If you suspect that your furnace circuit board is bad, there are a few things you can do to test it. First, check the wiring connections to make sure they are secure. Loose wiring connections can cause your furnace to malfunction.
Next, check the control board for any signs of damage, such as burn marks or melted components. If you see any damage, your control board must be replaced.
If you have a multimeter, you can test the voltage going to the control board. If the voltage is correct, but the control board is not functioning properly, the control board likely needs to be replaced.
What Causes Control Board Fail?
Several things can cause a Lennox furnace circuit board to fail. One of the most common causes is power surges or spikes. Power surges can cause damage to the components on the circuit board, which can lead to malfunctions.
Another common cause of circuit board failure is moisture. If water gets into the furnace, it can cause damage to the circuit board and other components. Additionally, age can also be a factor. Over time, the components on the circuit board can wear out, leading to malfunctions.
Can I Replace My Own Furnace Control Board?
While replacing your furnace control board is possible, it is not recommended unless you have experience working with electrical components. The process can be dangerous if not handled properly, and replacing a control board involves working with high-voltage electricity. If you are uncomfortable working with electrical components, hiring a professional to replace your control board is best.
The Lennox control board replacement cost can vary depending on several factors, including the type of furnace and the labor. To determine if your furnace circuit board is bad, look for signs such as the furnace not turning on, the blower fan not turning off, the furnace cycling on and off frequently, and strange noises coming from the furnace. Regular maintenance can help detect and fix Lennox furnace issues before they turn into major problems, and inspections can help identify any potential issues before they become a problem.
