Sears Furnace Parts — Browse All Models

How to troubleshoot common Sears furnace problems

Here are some typical Sears furnace problems you might run into, and what to do about them.

• Won’t turn on. Check the house circuit breaker for the furnace to make sure it’s turned on. Reset the circuit breaker if it’s tripped. Sears gas furnaces often have a cut-out switch that looks like a regular light switch located on or beside the furnace that shuts off electrical power to the furnace. Make sure that this cut-off switch is turned on. Low air flow can also prevent a gas furnace from working, so check the air filter and replace the filter if It’s clogged with lint. Check the pilot light if your Sears gas furnace uses one to ignite the gas. Light the pilot if it’s out.
• Lack of air flow through the vents. A clogged air filter can prevent air from flowing through the vents, so replace the air filter if it’s clogged. If the filter isn’t clogged, a problem with the blower fan may be causing low air flow through the vents.
• Makes a lot of noise. Bearings in the blower fan can make loud squealing or screeching noise when the furnace runs. Replace the blower fan if its bearings make noise while the fan runs.

• Air pressure switch. The furnace air pressure switch detects airflow through the furnace.
• Auxiliary limit control. The auxiliary limit control helps protect against overheating by starting the blower when temperatures rise too high.
• Blower fan motor. The furnace blower fan motor circulates the air through the heating chamber and out into the room.
• Burner door gasket. The furnace burner door gasket forms an airtight seal between the burner door and the combustion chamber.

To find your local Sears Home Service pros, search for furnace repair near me.