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HomeRepair HelpThermador Vent Hood RepairThermador Range vent hood is overheating Repair
Thermador Range vent hood is overheating
If your Thermador range vent hood is overheating, restricted airflow is the most likely cause. Start by inspecting the range hood filter. A dirty or clogged filter makes the blower motor work harder and can cause the motor to overheat. If the hood has always run too hot, check the air duct for an incorrect diameter, excessive length, or an outdoor vent obstruction such as a bird's nest. Next, inspect the Thermador range vent hood damper to make sure it opens fully and is not stuck closed. A clogged grease filter can often be cleaned with degreaser and warm, soapy water, but replace it if it remains dirty or is damaged. Less commonly, debris on the blower wheel or fan blade can restrict airflow and cause overheating. Clean these parts carefully and replace them if damaged. Turn off power to the Thermador range vent hood before servicing, and stop using it if you smell burning or notice electrical damage. Enter your model number to find the exact replacement filter, damper, blower wheel, or fan blade for your specific Thermador range vent hood.
01 - Thermador 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 - Thermador 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.
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 - Thermador 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.
Uncommon But Possible
06 - Thermador 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.
Uncommon But Possible
Frequently Asked Questions
Why is my Thermador range vent hood overheating?
Can a clogged filter make my Thermador range vent hood overheat?
What should I check if my range hood has restricted airflow?
Should I replace the blower motor if my Thermador vent hood is overheating?
How do I find the correct Thermador range vent hood filter or blower wheel?
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