Get your heat or AC working again tonight
We're on call around the clock for homes across Chicagoland and the northwest suburbs. No call centers, no runaround, just direct help from a local pro.
Companies push new units. We fix.
Companies push new units. We fix.
Heating repair
Furnace acting up in the middle of January? We get it running again, fast.
AC repair
Air conditioning down before a heat wave. We'll find the problem and make the fix.
Emergency callouts
Heat out at 2 a.m. or AC dead in July? We pick up, day or night.
Preventive maintenance
A tune-up now keeps the breakdown from happening later. Simple, scheduled, worth it.
System installation
New furnace or AC? We help you pick the right size and put it in right.
System replacement advice
Sometimes a fix doesn't make sense. We'll tell you straight when it's time.
Straightforward pricing for heating and cooling repairs
Get honest, upfront pricing for HVAC repairs, tune-ups, and installations across Chicagoland and the northwest suburbs. No guesswork.
Standard repair
Common heating and cooling fixes with a clear quote before we start. Built on your system's actual condition.
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On-site diagnosis
Written estimate
Same-day service
Preventive tune-up
A thorough seasonal check to catch small issues before they become expensive repairs. Keeps your system running.
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per visitInspect key components
Clean essential parts
Check refrigerant levels
Operation report
Emergency call-out
When your heat or AC fails at 2 a.m., we pick up. Available 24/7 for urgent breakdowns across the region.
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24/7 availability
Priority dispatch
Temporary fixes
Straight answers and real fixes
Our furnace died on the coldest night of the year. J.D.S stayed on the phone with me, walked through what to check, and was at the door the next morning. Fixed it fast.
Mark Whitfield
Homeowner in Algonquin
No upsell, no pressure. Just a clear diagnosis, a fair price, and the AC blowing cold again the same day. That's how it should work.
Diane Kowalski
Homeowner in Lake in the Hills
Called J.D.S late on a Sunday when the heat wouldn't kick on. Technicians talked me through it, got the system running, and scheduled a proper check-up for the next week. Solid.
James O'Connell
Homeowner in Crystal Lake
HVAC questions, answered straight
Browse common questions or reach out for answers.
Need HVAC service in Lake in the Hills?
Call +12345678900 for upfront pricing and a technician who shows up when they say they will. J.D.S HVAC serves the Chicagoland area and northwest suburbs, day or night.