Would you like help identifying wires for a specific Lasko model? If so, share the model number and any visible wire colors.
A typical 3-speed Lasko fan circuit consists of four primary elements:
Many DIYers buy a generic 3-speed rotary fan switch from Amazon or a hardware store. Lasko uses proprietary pin arrangements. If you use a generic switch: Lasko Fan Wiring Diagram
Most Lasko box fans (Model 3720, 3733) follow a nearly identical pattern. Here is the of electricity:
Before diving into the wires, let’s address the most common scenarios that drive people to search for these diagrams: Would you like help identifying wires for a
Before attempting any repair or even looking at the wiring, UNPLUG THE FAN. Capacitors can hold a charge even after the fan is off. If you are uncomfortable with soldering or reading multimeters, consult a professional. This guide is for educational purposes.
→ Thermal Fuse → Speed Switch (Common terminal) → Switch selects Low/Med/High → Motor Speed Tap → Motor Neutral → Wall Plug (Neutral/White) . Lasko uses proprietary pin arrangements
This comprehensive guide will walk you through everything you need to know about Lasko fan wiring diagrams, including how to read them, where to find them, common wiring configurations, and essential safety precautions.
To wire or repair a standard Lasko fan, use the following logical steps: 3 speed Box fan bypass or replacement