Your AC Stopped Working. Here's What's Actually Wrong.
When your air conditioner is running but your house won't cool down, the problem is usually something specific and fixable — not a reason to buy a new system. We diagnose the actual issue, tell you what it costs to fix it, and get your AC running again. That's it.
Common AC Problems We Fix Every Day
Most air conditioning failures in the northwest suburbs come down to a handful of components. Here's what we look for and what it typically means for your repair:
Refrigerant Leak
Low refrigerant is one of the most common reasons an AC runs but won't cool. We locate the leak, repair it, and recharge the system — not just top it off and leave.
Failed Capacitor
A bad capacitor is one of the most frequent AC failures, especially in older units. It's also one of the most overcharged repairs in the industry. A capacitor replacement that runs $400–$500 at large HVAC chains costs $150 with us.
Frozen Evaporator Coil
If your AC is blowing air but not cooling, a frozen coil is often the culprit. This is usually caused by restricted airflow or low refrigerant — both diagnosable and fixable without replacing the system.
Faulty Compressor
The compressor is the heart of your AC system. When it fails, the system can't move refrigerant and cooling stops entirely. We'll give you an honest read on whether repair or replacement makes more sense given the age and condition of your unit.
Dirty or Blocked Condenser Coils
Condenser coils clogged with dirt, debris, or cottonwood can cause your system to overheat and shut down. A thorough cleaning often restores full performance without any parts replacement.
Why Homeowners in the Northwest Suburbs Call Us Instead of the Big Companies
We're not a call center dispatching the nearest available tech. When you call JDT, you reach Joel directly. He shows up, diagnoses the problem himself, and tells you what it costs before any work begins. If something can be repaired, we repair it. We don't use a service call as an opportunity to sell you a new system you don't need.
That approach has earned us a 5.0 rating across 80+ Google reviews — not because we're the flashiest HVAC company in the area, but because people can tell the difference between a straight answer and a sales pitch.
Fair AC Repair Pricing — Before We Touch Anything
You'll know what you're paying before we start. We quote the repair, explain what's wrong in plain language, and give you the information you need to make a decision. No invoice surprises. No pressure.
Common AC repairs we handle regularly:
- Capacitor replacement
- Refrigerant leak detection and recharge
- Fan motor replacement
- Contactor and relay replacement
- Thermostat diagnosis and replacement
- Frozen coil diagnosis and restoration
- Condenser coil cleaning
- Electrical fault diagnosis
We service all major AC brands and models, including central air systems, heat pumps, and ductless units.
Emergency AC Repair Across the Northwest Suburbs
Weekends, holidays, or the hottest afternoon of the year — we answer the phone. JDT provides 24/7 emergency air conditioning repair throughout Streamwood, Schaumburg, Bartlett, Hanover Park, Elgin, and Hoffman Estates. When your AC goes down and you can't wait until Monday, you need someone who actually picks up.
Areas We Serve for AC Repair
We're based in Streamwood and serve the surrounding northwest suburbs across Cook, DuPage, and Kane counties. Our service area includes Schaumburg, Bartlett, Hanover Park, Elgin, and Hoffman Estates, with additional coverage in Carol Stream, Roselle, and Glendale Heights.
If you're not sure whether we cover your area, call us. We'll tell you directly.
AC Repair Questions We Hear All the Time
Straight answers before you schedule
Why is my AC running but not cooling my house?
The most common causes are a refrigerant leak, a failed capacitor, a frozen evaporator coil, or a dirty condenser. All of these are diagnosable on a single visit. In most cases, the system can be repaired the same day without replacing any major components.How long does AC repair take?
Most repairs are completed in one visit, typically one to three hours depending on the issue. If a part needs to be ordered, we'll let you know upfront and schedule the follow-up as quickly as possible.Does JDT service all AC brands?
Yes. We work on all major residential and light commercial AC brands, including Carrier, Trane, Lennox, Rheem, Goodman, York, and others. The brand on the unit doesn't affect our ability to diagnose or repair it.When should I repair my AC instead of replacing it?
As a general rule, if the repair cost is less than half the price of a new system and the unit is under 12–15 years old, repair is usually the right call. We'll give you an honest assessment based on the actual condition of your system — not a number that happens to justify a replacement sale.How much does AC repair cost in the northwest suburbs?
It depends on the repair, but common fixes like capacitor replacements, refrigerant recharges, and contactor swaps are significantly less expensive than what large chains typically charge. We quote before we start, so you're never guessing. Do you offer emergency AC repair on weekends and holidays? Yes. We provide 24/7 emergency HVAC repair service, including weekends and holidays. When you call, you reach a real person — not a voicemail or answering service.
Schedule AC Repair or Call for Emergency Service
If your AC isn't working, don't wait to see if it fixes itself. Call us now for same-day or emergency service, or use the form below to request a repair appointment. We cover Streamwood, Schaumburg, and the surrounding northwest suburbs.