3 common issues that mean you need to replace your furnace

Knowing the ins and outs of your furnace can help you save energy and money, increase your system's efficiency and provide a more comfortable environment for you and your family.

Consider replacing your furnace with a high-efficiency model if you have one or more of these common issues.

1. Cracked heat exchanger                          

The heat exchanger is the metal wall that heats up when the burners are ignited. It is the only barrier between the exhaust gases and the air supplied to the home. A crack could lead to contamination of the household air with carbon monoxide.

Why it matters: A cracked heat exchanger can be a safety issue because the exhaust gases inside can leak into the home.

What it costs: A heat exchanger replacement could cost up to $2,000, which can be more than the cost of a new energy-efficient furnace.

2. Circuit board

The circuit board is the brain of most modern furnaces. It controls many sophisticated processes and continuously monitors the furnace’s operation.

Why it matters: An issue with the circuit board can cause the furnace’s blower fan to run improperly, which can be noisy and waste energy.

What it costs: Replacement can cost $300-$1,000, but if the furnace is not energy efficient, you may save energy and money in the long run by replacing the furnace.

 3. Motor

The furnace motor powers the fan that pushes heated air throughout the home.

 Why it matters: When broken, heated air cannot move throughout your home. Your furnace will run more than needed and waste energy—failing to adequately heat your home and keep you comfortable. A variable speed motor may improve the unit’s efficiency and your home’s air quality because it controls airflow more precisely.

 What it costs: Replacement can cost $400-$900. Upgrade to a new furnace with a variable speed motor to receive a rebate and maximize your investment.