Smith-Dahlquist, Inc.

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Claim This BusinessAbout Smith-Dahlquist, Inc.
Smith-Dahlquist, Inc. has earned a 4.9-star average rating across 212 client reviews in Sycamore, Illinois, establishing themselves as a leading HVAC contractor throughout DeKalb County. The company maintains around-the-clock availability, ensuring customers in both Sycamore and nearby DeKalb have access to heating and cooling support whenever need arises. Long-term clients consistently highlight the team's depth of knowledge, with office staff like Shelley and Bradley guiding homeowners through equipment selection decisions.
What distinguishes Smith-Dahlquist from neighboring contractors lies in their attention to post-installation follow-through. Multiple reviews document a policy where technicians return days after new furnace or air conditioning installation to verify performance and address homeowner questions. This methodical approach extends to gas fireplace servicing, where the same technician who performs the initial inspection handles pricing inquiries and follow-up consultations rather than routing customers through multiple office contacts.
Customer narratives reveal technicians who arrive prepared to explain system operations in accessible terms. Terry, a frequently referenced service professional, has fielded questions about gas fireplace blowers and checked existing electrical infrastructure during maintenance calls. Steve performed fall HVAC maintenance on one client's system while taking time to explain component functions. The company's emergency availability means these knowledgeable technicians respond across all seven days of the week.
What Customers Say
Every reviewer awarded a 5-star rating, with Terry and Steve appearing most frequently in detailed accounts of furnace inspections, fireplace cleaning, and annual maintenance visits. Clients emphasize the technicians' patience in answering questions and the follow-up communications received after service completion.
Working Hours
| Sunday | Open 24 hours |
| Monday | Open 24 hours |
| Tuesday | Open 24 hours |
| Wednesday | Open 24 hours |
| ThursdayToday | Open 24 hours |
| Friday | Open 24 hours |
| Saturday | Open 24 hours |
Services
Gas Fireplace Cleaning & Inspection
Technicians thoroughly clean fireplace components, inspect glass condition, and verify safe operation for the heating season.
Furnace Installation & Replacement
The team assists with selecting appropriately sized furnaces, professionally installs new units, and post-installation performance checks.
Air Conditioning System Installations
From unit selection guidance through professional installation and follow-up verification, the process ensuresCooling system reliability.
HVAC Preventive Maintenance
Annual tune-ups include component inspection, filter assessment, and system calibration to extendEquipment lifespan.
Heating & Cooling Repair Services
Same-day repair availability addresses system failures requiring immediate attention across all weekday and weekend periods.