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Frequently Asked Questions View all FAQs
How do you order the correct replacement parts?

Before ordering replacement parts, make sure you have the fan model and serial number.

Where can I find instructions to wire a motor on my fan?

The nameplate of the motor includes a wiring diagram. Wiring diagrams can also be found beneath the motor image in our Buy Parts section. Simply click the wiring diagram icon to view it.

Can I install a thermostat?

Yes, but only if the thermostat has a simple on/off operation. Please note: if the thermostat varies the amount of voltage delivered, it will damage the motor and void the warranty.

Can I install my whole house fan vertically?

Comfort Cooler (CC) series whole-house fans may be mounted vertically, however, the AS and CSS shutters will not function properly in the vertical position. We do not carry a ceiling shutter for vertical installation. Vertical installation instructions.

Quality Products

Download our latest product catalog.

1/2 HP 2 Speed Motor

SINCE 1948.

1/2 HP 2 Speed Motor

Product ID : PMTR-QBX4223


SKU: PMTR-QBX4223 Categories: , , , , , ,
Parts and accessories are non-refundable


Replacement Motor for QBX3623/QBX4223
-1/2 Horsepower
-2 Speed

Warning:Use only on a QBX Series Triangle Engineering Fan (CCW Rotation. Shaft end.)

Replaces D-RE-PSC-139/45-4P2SP-1/2HP-ZZ
WARNING: Rotation is counter clockwise when viewed from pulley end. This motor is NOT Reversible. This is not a replacement motor for Big Air Fans, Ventamatic Fans, MaxxAir Fans or Air Vent Vans.

NOTE: Do not order this item if your original motor number ends with the letter “A”.

Parts are non-returnable.

Replacement for Fan Model Number(s):
QBX4223 QBX3623