Replacement Power Vent Motor for PR3, and PG3 Series Vents

MasterFlow advised this was the motor for my attic vent fan. When it arrived, I found this piece of paper in the box. I had no idea which motor my fan had so I tried it without the spacer. It quickly became obvious that the clip was needed. Trying to stand on a ladder in my attic, reach over an AC unit and keep the motor and spacer in place while tightening the bracket was an exercise in frustration. Poor design and a cheap implementation to make a square peg fit in a round hole.

It was difficult for me to try to install into already installed housing with the ring that goes around the motor while trying to hold in place. After several almost successful attempts I gave up I ended up using a strip from a a roll of magnetic strip and push it up into place between the frame and the motor while going around the motor until the fit was firm. No rattles cobbles at full speed. Success.

Great product with two weeks in. Make sure you purchase the proper size motor for your attic fan. This one has enough horsepower to run my high-pitch 5-bladed fan. A smaller one that I purchased off the shelf only lasted one day. Also my install didn't need the included spacer clip.

This motor was an exact replacement for my old roof power ventilators. Was lucky, the old power vents were installed in 2006 and failed 2019. The old motors were zhongshan broad-ocean ydz-150l62540-01. Theses replacement motors are heavy duty and more powerful. Hope this equates to long life. These motors fit the frames of the original power vents. They include spacer rings that I didn’t need. The flex conduit from the old motors (connection from motor to thermostat) they easily unscrewed from old motor and easily reattached to new motor. Happy I found these, wasn’t in the mood to replace with new roof vents. The replacement motors are a little more than the basic motor and worth the extra $20 in my opinion One installation tip for the do it your sellers ... affix the flex conduit from old motor to the new. Insert motor in frame and align the blade set screw to the flat part of the motor shaft. Let new motor shaft extend about 1/2” past blade and tighten set screw. This way the fan blade supports the motor as you maneuver the motor into the frame.

Easy to remove old motor and install the new one. I am not an electrician but it worked the first time.

I installed two separate replacement motors in the last month.The original ones lasted 15 years, that is when we built this house. Easy to install and if these last as long as the original

Replacement motor has been installed and running for 3 months with no problems. Motor is quiet and vibration free. I have to go outside and look for open loovers to know if fan is in operation. Original motor lasted 15 months.

Motor was easy to install and runs very quiet.