The same thing was happening to my broan 83000 kitchen hood.
Kitchen exhaust fan blowing wrong way. By comparison the most powerful residential hood fan made by. If you plug the vent it s going build pressure and blow back into the home. If i held a piece of paper up to the hood it was blowing down and not sucking upwards. One of the most powerful fans i ve seen is a japanese brand called san yang pai.
These particular types of kitchen exhaust fans are just too powerful for most homes. Ac fan compressor not working how to test repair broken hvac run start capacitor air condition hd duration. The vent opens correctly when the fan is on. The right hand fan draws air as shown very well.
The fan must have been installed backwards. Richard lloyd 2 471 519 views. If your vent fan does not have a built in switch to reverse the direction in which the fan s blades rotate you can manually require the fan to run in a reverse polarity. This nutone ntm premium range hood is vented straight out thru the back of the wall.
A universal replacement motor for most bathroom fans. I took the cover off disconnected the power 2 wires on each end plastic snap in by pulling the 2 plastic pieces awart unscrewed the 2 butterfly looking nuts and and slid the motor out. The least powerful fan they make is rated at 650 cubic feet per minute cfm which is a ridiculous amount of air being removed from the house. I noticed our new stove hood exhaust fan seems to be blowing rather than sucking.
Go outside and find the vent. The left hand fan blows down so hard it makes the flames flicker on the gas burners. If the fan is not turning the wrong way i suspect your exhaust ducting or outdoor vent is blocked. The fix is going to require careful inspection of the whole vent system from the fan housing all the way through the vent pipe and out to the place where the pipe terminates the.
The wiring of the kitchen and the installation of the hood were done by a bit of an amateur electrician so i was wondering if maybe the live and neutral were swapped. It is often the case that a fan trying to blow into a blockage will generate a lot more noise than one that has a free flowing path for the air that the fan is moving. There are two fan motors in this model. It s simple to reverse.