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Why won't the fan on my downdraft vent blow air?
less than a minute readApr 19Lyle Weischwill
A failed fan control switch, wiring failure, bad blower fan motor or broken blower wheel can prevent the downdraft fan from blowing.
Unplug the downdraft vent and check the motor wire harness connections. Reconnect any loose wires and repair any damaged wires.
If the wires are okay, turn on the fan control switch and check for continuity through the fan control switch using a multimeter (with the downdraft vent still unplugged). Replace the fan control switch if you don't measure continuity through the control switch.
Replace the blower fan motor if the motor doesn't run when activated.
If the motor runs but the fan doesn't move air, check the blower wheel and replace if damaged.
These repairs may help solve your downdraft-ventilation-system problem
Replace the downdraft fan control switch
If the fan control switch will not change the motor speeds or turn the blower motor off, replace the fan control switch. If the blower motor will not run, check the two limit switches for proper operation.
Downdraft fan control switch
Find the required part specific to your product.
Nov 01
How to replace a downdraft vent fan control switch
If a downdraft vent blower blows at the wrong speed or if the fan won’t start, the fan control switc…
Repair time and Difficulty
15 minutes or less
Replace the downdraft blower fan motor
If the blower fan motor doesn't run when the vent pops up, check the limit switches and the fan control switch. If the switches are okay, replace the blower motor.
Downdraft blower fan motor
Find the required part specific to your product.
Nov 01
How to replace a downdraft vent blower motor
A downdraft vent blower motor that won't start could have a worn-out motor. This DIY repair guide an…
Repair time and Difficulty
15 minutes or less
Replace the downdraft blower wheel
If the blower motor has excessive vibration and noises when running, check for loose mounting nuts and fan bracket securing the blower motor. If the fan bracket and mounting nuts are tight, the blower wheel is likely unbalanced, replace the blower wheel.
Downdraft blower wheel
Find the required part specific to your product.