Note: Synchron Motor number 37944L has become very difficult to obtain due to a manufacturing shortage not expected to recover until 2022.  However, we offer two Belimo kits designed to replace the 37944L at about the same cost, which mount a far more robust Belimo commercial motors in the place of the old Synchron motor.  Both Belimo kits carry a 5 year warranty and will far outperform the original motor. Use the BH Kit 2 (three wire upgrade - see item number 350925227639) or TFB Kit 2 (uses the two original wires - message us via Ebay for more information).

Synchron motor  with 5 digit code on side of 37944L yellow wire long pin motor used on Ztech and Buetler dampers  Do not order unless you see that number, there are many motors that look like this from the back side.  Also see our ads in store Damper Direct for other Synchron motors, as well as our Kit 2 Belimo motors (eBay item 350925227639)  that will retrofit a 3 wire commercial motor into this application. 

*This motor may replace your old motor IF the drive or output shaft is identical to pictures, and the 5 digit number ends with the letter 'L" (meaning left hand rotation) , and its 24volts ac.  Do not order if the 5 digit number ends in "R", that means "right hand rotation" and the motor will not work for you, even if it looks identical.

* You must either match the numbers, or visually the output shaft.  Synchron made hundreds of motors that look the same from the motor side, but are not interchangeable, you must verify the 5 digit number.  Thanks! 

* Cant find the right motor? Check our store Damperdirect for our Belimo powered retrofit kits, that allow the outstanding Belimo (Belimo is the largest maker of commercial damper motors in the world) commercial damper motors to be retrofitted back on to many types of existing dampers with dead motors.  

This auction is for 1 (one) of the above motors that fit our popular rectangular dampers "HVAC Motorized Zone Control Small (or Large) Rectangular Damper"

If you purchased one of these spring return type dampers on ebay from our store "damperdirect" then this is the motor you need as a replacement.  Precise measurements shown are for other dampers that may use this motor, to verify dimensions.

This same motor has been used on other types and brands of dampers, including Enerstat, Lennox, Jackson Controls, Robert Shaw and others. Please do be aware some dampers use similar motors but the shaft dimensions are different, and thats why we include those dimensions here. But, if you are looking for a motor to replace one on a spring return rectangular damper purchased from us, THIS IS the correct motor.

If you do not see what you need, dont hesitate to call and we can do a special Ebay auction for other items we carry! All motors are new inventory, 1 year warranty, and come with full service and support. 

From damper direct, where zoning is our only business! We offer the service, support, and technical resources to help you design or service your Zone Control System.