About Us

A&R Diagnostic has been around for 20+ years with an outstanding track record for successful repairs. We work with high end manufactures and the best cliental.  A&R originated a demand in service for the high tech commercial brands, which we represent today.  Our certified technicians receive an elevated level of training from our manufactures to ensure maximum customer benefits. Our performance to our sustainable customers has exposed our 99% first time fix rate which is unattainable from others in the industry.  A&R has the most master techs in one company for Rational and Unox.

Office Contacts

Tony Jr - Service Manager

Customer Service


A&R Diagnostic Service | 8117 S Lemont Road, Suite 9, Darien IL 60561 | 630-427-1611