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AB Controls can service all your DMS installations & maintenance needs! Don't spend a fortune replacing your DMS systems. Contact Us TODAY! 


For All Other Brands Visit  


Your ONE STOP SHOP for ALL controller brands!  


AB Controls, LLC specializes in Robertshaw, Siebe, Invensys & Barber Colman service and parts!

Do you need to BUY PARTS?

AB Controls, LLC stocks thousands of hard-to-find and obsolete parts in PERFECT condition for your Robertshaw, Invensys, Siebe and Barber Colman systems! We offer a 1-year warranty.


Email us your PartsRequest or click on the links for Robertshaw, Siebe & Invensys Controllers, Barber Colman Controllers.

Do you need OTHER BRANDS? visit www.ABCgreymarketUSA.com for a list of all other brands, including:

Alerton, Andover, Automated Logic, Barber Colman, Circon, Delta, Distech, Honeywell, Invensys, Johnson Controls, Reliable, Robertshaw, Siebe, Siemens, Smart Controls, TAC, Trane, Voyant…

and much more! Or simply EMAIL US with your request.

Do you have SURPLUS PARTS? SELL Us SURPLUS PARTS! We welcome you to send us a LIST of any DDC Controllers pulled from retrofit projects! If we don't already have it in stock, we will send you a quote! All brands, new or used! Just tell us Quantity, Brand Name, Condition & Asking Price.



AB Controls USA. * Copyright © 2001 AB Controls USA.  *  All rights reserved.  *  Revised: 04/10/14.