# Commercial Electric Motor Service, Inc. > Midwest's largest electric motor inventory. AC, furnace, blower & pump motors in stock with same-day nationwide shipping. Family-owned since 1944. Call (314) 531-1888. Business type: Local Business. Address: 3121 Washington Blvd., St. Louis, MO 63103. Phone: (314) 531-1888. ## Pages - [About CEMSI](https://www.cemsi.net/about.md): Family-owned since 1944. Three generations of electric motor expertise at one St. Louis counter, with the Midwest's largest motor inventory. (314) 531-1888. - [AC Fan Motor Not Spinning? 5 Signs You Need Repair](https://www.cemsi.net/blog/signs-for-air-conditioning-motor-repair.md): AC fan motor not spinning, humming, or grinding? Five signs your air conditioning motor needs repair, from the motor counter serving Nashville, IL. 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Call (314) - [Farm Duty Electric Motors in St. Louis, MO](https://www.cemsi.net/farm-and-agricultural-duty-motors.md): Farm duty electric motors built for dust, weather, and long hours: crop dryer, grain stirring, aggregate, and hostile duty. Same-day shipping. (314) 531-1888. - [Find My Motor](https://www.cemsi.net/find-my-motor.md): Replacing an electric motor? Read your nameplate, match the brand, or send a photo. CEMSI cross-references ABB, GE, Emerson, Fasco, Marathon, Century & more. - [Furnace Blower Motors in St. Louis, MO](https://www.cemsi.net/furnace-motors.md): Furnace blower motors in stock in St. Louis, MO. Direct replacements for every major furnace brand with same-day shipping. Call (314) 531-1888. - [Guide to Selecting Energy-Efficient AC Motors](https://www.cemsi.net/blog/guide-to-selecting-ac-motors.md): Selecting an efficient air conditioning motor: PSC vs ECM, efficiency ratings, and what they mean for your energy bill. From the St. Louis motor experts. (314) - [How to Choose the Right AC Motor: Specs, Sizing & Fit](https://www.cemsi.net/blog/how-choose-air-conditioning-motors-for-sale.md): How to choose an electric motor for your AC system: match horsepower, voltage, RPM, and frame size. Expert help and motors for sale near Nashville, IL. (314) - [Privacy Policy](https://www.cemsi.net/privacy.md): Privacy Policy for the Commercial Electric Motor Service (CEMSI) website. How we collect, use, and protect the information you share with us. - [Pump Motors in St. Louis, MO](https://www.cemsi.net/pump-motors.md): Pump motors in stock in St. Louis: pool, fire pump, well, pressure washer, circulator, and car wash duty. Same-day shipping nationwide. Call (314) 531-1888. - [Request Service](https://www.cemsi.net/schedule.md): Request a service appointment or motor pickup from Commercial Electric Motor Service. Tell us what you need and we'll follow up to confirm a time. Call (314) - [Service Areas](https://www.cemsi.net/service-areas.md): Electric motor sales and repair serving St. Louis, MO and southwest Illinois, with same-day nationwide shipping. Find your service area. (314) 531-1888. - [Specialty Electric Motors in St. Louis, MO](https://www.cemsi.net/miscellaneous-motors.md): Specialty electric motors for sale in St. Louis: explosion proof, DC, multi-speed, kiln duty, VFD, pizza oven, and more. One counter for every industry. (314) - [Terms of Use](https://www.cemsi.net/terms.md): Terms of Use for the Commercial Electric Motor Service (CEMSI) website. Please read these terms before using cemsi.net. - [What Your AC Motor Actually Does](https://www.cemsi.net/the-role-of-air-conditioner-motors-in-keeping-arnold-mo-cool.md): What does an air conditioner motor do, and why does it fail? The role of AC motors in keeping Arnold, MO cool, plus maintenance tips. (314) 531-1888.