Service Tech Heating & Air Conditioning

Service Tech Heating & Air Conditioning handles residential heating, air conditioning and indoor air quality work in the western suburbs of Chicago. Its technicians diagnose and repair furnaces and AC systems, install new units from most makes and models, and offer maintenance plans to keep systems running through every season.

All technicians are NATE-certified, and the company says it focuses on honest advice and will not push services a home does not need. Hours are listed as open 24 hours, seven days a week, and the company serves Montgomery and nearby towns including Aurora, Naperville, Oswego and Plainfield. Customers can call the office to ask whether their address falls inside the service zone.