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About J&S ALL TECH LLC
J&S ALL TECH LLC is a licensed HVAC contractor based in Chicago, Illinois, serving the greater Chicagoland metro area including neighborhoods like Hyde Park, Lincoln Park, and surrounding suburbs. With 123 verified client reviews generating a sterling 4.7-star average rating, the company has built its reputation on transparent diagnostics and reliable furnace, boiler, and air conditioning solutions for residential properties throughout the city and nearby municipalities.
What distinguishes J&S ALL TECH LLC from competing Chicago contractors is the hands-on, owner-operator approach led by senior technician Abraham, whose expertise extends to complex system integrations involving aging equipment. The company handles challenging repairs that other contractors decline, including salvaging boilers deemed unrepairable by larger competitors and matching new cooling systems with legacy heating infrastructure. Client feedback specifically highlights Abraham's willingness to address problems created by previous vendors, ensuring seamless system compatibility without pushing unnecessary full replacements.
Homeowners consistently reference Abraham by name when describing their positive experiences. One client recounted how Abraham arrived within 48 hours of the initial call to diagnose an urgent heating issue, then walked the customer through proper maintenance protocols. Another review described Abraham rescuing a boiler that two competing companies insisted required total replacement, restoring it to full operational capacity. A third client praised his meticulous follow-up, noting Abraham refused to leave until thoroughly confident all systems functioned correctly after installing new central air conditioning.
What Customers Say
All four featured reviews award 5 stars and name technician Abraham specifically, praising his diagnostic accuracy, honest assessments, and refusal to recommend unnecessary replacements. Multiple reviewers mention his willingness to tackle jobs other contractors declined, with one client noting he fixed a boiler that competing companies said could not be saved.
Services
Furnace Repair & replacement
Diagnose and replace aging or failed residential furnaces, including matching new units with existing infrastructure.
Boiler Service & Repair
Restore malfunctioning boilers to operation, even when other contractors recommend full replacement.
Central Air Conditioning Installation
Install new cooling systems with careful attention to furnace compatibility and proper setup.
System Diagnostics
Accurate problem identification using hands-on inspection, with explanations provided to homeowners.
Preventive Maintenance Guidance
Post-service instruction on maintaining equipment longevity and optimal performance.