Unlock the Right Part
for Your Repair
Find the exact part you need
Enter your model number to see parts that fit your machine.
Price Match Guarantee
In-stock parts ship the same day
365-Day Return Policy
Price Match GuaranteeChoose Product
Identify Problem
03
Find Solutions
HomeRepair HelpIntertherm Central A/C RepairIntertherm Central air conditioner not blowing enough Repair
Intertherm Central air conditioner not blowing enough
If your Intertherm central air conditioner is not blowing enough air, start with the most likely cause: a dirty evaporator coil, clogged air filter, or restricted blower wheel. Reduced airflow can cause the evaporator coil to freeze, so check and replace the air filter as recommended and clean the coil only as directed in the owner's manual. Next, inspect the furnace blower motor. A failing motor may not circulate enough cooled air; with power disconnected, check whether the blower wheel turns freely, since seized bearings can indicate a motor replacement. Make sure every register is fully open, then check for a blower motor that is wired for the wrong speed. If the filter, evaporator coil, and ductwork are clear, incorrect wiring may require a qualified technician to verify airflow. Dust and debris can also clog the blower wheel and housing, reducing air movement through the vents. Turn off power before cleaning, and avoid damaging the sharp fins. Testing or rewiring the blower motor involves electrical hazards and may include 240V line voltage, so use a qualified technician if you are not trained. Enter your model number to find the exact Intertherm replacement blower motor, blower wheel, filter, or other part for your central air conditioner.
01 - Dirty Evaporator Coil
Proper air flow is critical for the central air conditioner to work properly. The evaporator needs sufficient air flow to keep the condensing water from freezing. If the evaporator coil, air filter or blower wheel gets clogged, air flow will be reduced causing ice to start forming on the evaporator coils, eventually freezing them up. It is recommended to replace the air filter at least every 6 months or sooner depending on the conditions. Refer to owner's manual for air filter replacement frequency recommendations and for evaporator coil cleaning instructions.
Highly Likely
02 - Intertherm Central Air Conditioner Blower Motor
Since the furnace's blower motor is the component that circulates the cooled air through the home's venting, a defective blower motor will result in the central air conditioner not blowing enough. You can use a multimeter to test the blower motor for electrical continuity, a continuous electrical path present in the motor, as well as determine if power is reaching the motor. You can also try turning the blower wheel by hand. If the wheel does not turn freely, it's likely the motor bearings have seized and the blower motor will need to be replaced.
Enter model number to search for the required part specific to your product
Highly Likely
03 - Register is Closed or Only Partially Opened
Some air registers have adjustable louvers that allow the air flow to be restricted or shut off entirely. This would be used to cut off the air flow to a room that isn't being used, or to restrict air flow to one room so more air will flow to the other rooms. If there is low air flow, check that the louvers are fully open.
Highly Likely
04 - Blower Motor Improperly Wired
Most central air conditioner blower motors have multiple speeds. Central air conditioners require higher speeds to move sufficent air throughout the home for cooling. If the blower was wired incorrectly it may not be moving enough air to properly cool the home. If the air filter and evaporator coil are clear and the air ducts are sealed properly but there is still not enough air flow, the blower may be wired incorrectly. Proper air flow is determined by several factors: the design of the duct work, the size of the home, and the size of the unit. A service technician may be required to determine if the air flow is sufficient for the home.
Highly Likely
05 - Intertherm Central Air Conditioner Blower Wheel and Housing
Over time the blower wheel and housing can become clogged with dust and debris. This will restrict the air flow, preventing the central air system from blowing enough. You can try cleaning the blower wheel with compressed air or with a soft bristle brush. Use caution when trying to clean the blower wheel as the fins are sharp and can be easily damaged. If the blower is damaged it will need to be replaced.
Common
06 - Clogged Blower Wheel
Over time the blower wheel can become clogged with dust and debris. This will greatly affect the air flow circulating throughout the home. You can try cleaning the blower wheel with compressed air or with a soft bristle brush. Be sure to shut off power to the unit before attempting to clean the blower wheel. Use caution when trying to clean the blower wheel as the fins are sharp and can be easily damaged. If the blower is damaged it will need to be replaced.
Common
Frequently Asked Questions
Why is my Intertherm central air conditioner not blowing enough air?
Can a dirty evaporator coil or blower wheel cause weak airflow and a frozen AC coil?
How do I test an Intertherm blower motor that is not moving enough air?
Could incorrect blower motor wiring cause my central air conditioner to blow weakly?
How do I find the correct Intertherm blower motor or blower wheel replacement part?
Shop by Intertherm Central Air Conditioner Parts
Our Story
Family-owned and operated since 1912, Burke America Parts Group is the longest-running genuine appliance, HVAC, and outdoor power equipment parts solution in North America. At Repair Clinic, we're proud to be an international brand trusted by the pros as well as the DIY community.
About Repair Clinic
© 2026 RepairClinic.com