Range vent hood is overheating

If your range vent hood is overheating, restricted airflow is the most likely cause. Start by inspecting the range vent hood filter. A grease-clogged filter makes the blower motor work harder and can cause the hood to overheat. Clean the filter with a degreasing solution and warm, soapy water, or replace it if it is damaged or will not come clean. If the range vent hood has always run too hot, check the air duct for an incorrect diameter, excessive length, or an obstruction such as a bird's nest. Also verify that the outdoor vent and vent damper are clear and that the damper opens fully. A stuck or partially closed range vent hood damper can restrict airflow. If those checks do not solve the problem, inspect the blower wheel and fan blade for grease or debris, then clean or replace either part if damaged. These steps address common range vent hood overheating problems before motor or wiring issues are considered. Enter your model number to find the exact replacement filter, damper, blower wheel, or fan blade for your specific range vent hood.

01 - Range Vent Hood Filter

The filters in the range hood need to be clean to have good air flow. If the filters are clogged, the blower will have a hard time moving air and the motor can overheat. Inspect the filter and clean or replace them if necessary.

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02 - Restricted Air Duct

If the range vent hood has always been too hot, inspect the air duct. If the air duct diameter is too small or the length of the duct is too long, the air flow will be restricted, possibly causing the vent hood to overheat. Refer to the installation instructions for proper vent size and maximum length. You can also inspect the outdoor vent hood for obstructions (a bird's nest, etc.) and confirm the vent damper is operating properly.

Highly Likely

03 - Range Vent Hood Damper

Most vent hoods have a damper to help keep the outside air from migrating back into the house when the vent is not in use. If the damper is stuck closed, or not opening all the way, the air flow may be restricted causing the motor to overheat.

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Common

04 - Filter is Clogged

If the range hood is overheating, the grease filter(s) may be clogged. If a filter is very dirty it can be cleaned. Remove it and soak it in a degreasing solution until the grease is dissolved. Next, wash it with warm, soapy water to remove any traces of the degreaser. If the filter does not come clean or is damaged, replace it.

Common

05 - Range Vent Hood Blower Wheel

If the blower wheel is clogged with debris the air flow will be restricted which can cause the range vent hood to overheat. You can try cleaning the blower wheel with dish soap and warm water. If the blower wheel cannot be cleaned or is damaged, it will need to be replaced.

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Uncommon But Possible

06 - Range Vent Hood Fan Blade

If the fan blade is clogged with debris the air flow will be restricted which can cause the range vent hood to overheat. You can try cleaning the fan blade with dish soap and warm water. If the fan blade cannot be cleaned or is damaged, it will need to be replaced.

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Uncommon But Possible

07 - Range Vent Hood Grease Filter

Range vent hoods use one or more grease filters to collect grease and oils rising up with the steam during stovetop cooking while allowing air to pass through. If the filters are clogged with too much grease, the blower will have a hard time moving air and the blower motor can overheat. You should periodically clean the grease filters with dish soap and warm water to ensure good air flow. If the filters are excessively soiled or damaged, they should be replaced.

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Uncommon But Possible