AC Repair
Diagnosis and repair for systems that are blowing warm, short-cycling, leaking or refusing to start.
Learn moreServices
Everything we service, repair and install
One team for the whole system — the equipment, the ducts that feed it and the controls that run it.
Full catalogue
Pick the job you need
Not sure which one applies? Describe the symptom when you call and we will sort it out.
AC Installation
Right-sized replacement systems, installed with the ductwork, airflow and refrigerant charge verified.
Learn moreFurnace Repair
No-heat calls, short-cycling, ignition faults and blower problems on gas, propane and electric furnaces.
Learn moreFurnace Installation
Replacement heating systems sized for your home, with venting and combustion air done to code.
Learn moreHeat Pumps
Air-source and ductless mini-split systems that heat and cool from a single piece of equipment.
Learn moreMaintenance & Tune-Ups
Seasonal inspection and cleaning that catches small faults before they become a no-heat or no-cool call.
Learn moreIndoor Air Quality
Filtration, ventilation and humidity control for homes with dust, allergy or stuffiness problems.
Learn moreDuctwork & Sealing
Finding and fixing the leaks and restrictions that keep good equipment from delivering comfortable air.
Learn moreThermostats & Controls
Smart and programmable thermostats wired, configured and staged correctly for your equipment.
Learn moreCommercial HVAC
Rooftop units, split systems and scheduled service for offices, retail and small commercial buildings.
Learn more
Repair or replace?
The honest way to decide
Nobody should sell you a system you did not need. These are the factors that actually decide it — bring them up when we quote your job.
| What to look at | Lean toward repair | Lean toward replacement |
|---|---|---|
| System age | Under about 10 years | 12–15 years or older |
| What failed | Capacitor, contactor, sensor, board, motor | Compressor, or a cracked heat exchanger |
| Repair cost vs replacement | A small fraction of a new system | Approaching a large share of replacement |
| Repair history | First real fault | Third call in two seasons |
| Refrigerant type | Current refrigerant, parts available | R-22, which is no longer produced |
| Comfort right now | Rooms are even, bills are steady | Hot and cold rooms, bills climbing yearly |
| How long you are staying | Moving within a couple of years | Staying long enough to earn back efficiency |
No single row decides it. Two or three pointing the same way usually does — and you should always be given both numbers and left to choose.
(602) 203-2395How it works
Four steps, no surprises
From the first call to a working system, here is exactly what happens.
Tell us what is happening
Call or send the form. Describe the symptoms, the equipment and how urgent it is.
Get a scheduled window
You get an appointment window rather than an open-ended wait, and a heads-up before the technician arrives.
Diagnosis and options
The system is measured and tested, then you get the findings and the options — in writing, before work starts.
The work, done properly
Repairs are completed and verified with readings. The work area is left clean.
Reviews
What customers say
Averaging 5 out of 5 across 2 published reviews.
Great HVAC company! Professional, honest, and knowledgeable, with very reasonable pricing. Excellent service. I highly recommend them!
Najibullah NoorGlandale · September 2026Review published on Google — view original Such great service from the most honest technician I’ve ever dealt with! The price was very affordable, and the issue was solved within just a few minutes. Several big-name HVAC companies were unable to fix my AC and instead tried to convince me that I needed a completely new unit. Thankfully, I finally found NORTHSTAR HVAC LLC. They diagnosed and fixed the problem quickly, saved me a couple thousand dollars, and even provided a service warranty. I highly recommend NORTHSTAR HVAC LLC to anyone looking for honest, reliable, and affordable HVAC service!
Yahya NasratPeoria · September 2026Review published on Google — view original
Next step
Ready to get your system sorted?
Tell us what it is doing and we will tell you what it takes to fix it. No pressure, no jargon.
Open 24 hours, 7 days a week