24/7 Emergency Service in Greater Cincinnati
(513) 555-0142
24/7 Emergency Service
Same-day AC and furnace repair, expert installations, and the most thorough maintenance plans in greater Cincinnati. A real human answers every call, every time.
18 yrs
Locally owned and operated
15,000+
Homes and businesses serviced
4.9 / 5
Average Google rating
3,200+
Verified reviews
Licensed, bonded & insured
NATE-certified techs
24/7 live dispatch
100% satisfaction guarantee
By the numbers
62 min
average on-site response time for emergency calls
97%
of repairs are completed on the first visit with parts on the truck
4.9 stars
average rating across 3,200+ verified Google and BBB reviews
$340
average annual savings reported by Comfort Plan members
What we do
Same-day diagnosis, honest fix, upfront pricing.
From frozen coils to cracked heat exchangers, our techs carry the parts most repairs need on the truck so you're cool (or warm) again before dinner. Every repair starts with a flat-rate $79 diagnostic fee, which is waived if you book the repair with us.
High-efficiency systems sized right for your home.
We perform a full Manual J heat-load calculation on every install so the system is sized for your actual home, not a sales quota. You get three equipment options at different efficiency tiers with honest payback math on each one.
Two tune-ups a year. Priority service. No diagnostic fees.
Members get a spring AC tune-up, a fall heat tune-up, meaningful repair discounts, priority dispatch, and no diagnostic fees. The average member saves $340/year and avoids the call that ends a summer weekend.
Cleaner air, less dust, fewer allergens.
Full whole-home duct cleaning using truck-mounted vacuum and rotary brush system, followed by antimicrobial sanitation. We also install UV air purifiers, MERV-13 media filters, and whole-home humidifiers.
Quiet, efficient heating and cooling in one system.
Ductless mini-splits for that one always-hot room, or full home heat pump conversions with Inflation Reduction Act rebates and financing built into the quote. Heat pumps can cut heating costs by up to 50% over gas in mild climates.
Restaurants, offices, and retail under 25 tons.
Rooftop unit service, replacement, and preventative maintenance contracts that keep your business comfortable and your tenants happy. We offer priority commercial SLAs with guaranteed response times.
Why Northstar
We were founded in 2006 by a Cincinnati homeowner who got burned by a contractor. Every policy we have written since then starts with the same question: is this what we would want if it were our own home?
Real humans on the phone day or night. No call centers, no answering services. Average emergency response is 62 minutes.
You approve the price before we touch a tool. Zero surprises on the invoice, ever.
Every tech is NATE-certified, EPA 608-certified, background-checked, and drug-tested before their first ride-along.
If you are not thrilled with the work, we make it right or we refund you. No fine print, no argument.
We stock 500+ common parts on every truck. 97% of repairs are completed on the first visit.
Qualifying new installs include a 10-year parts and labor warranty, the longest in greater Cincinnati.
How it works
01
A live dispatcher answers 24/7. For routine service, online booking confirms your slot in under two minutes. You choose your preferred window.
02
30 minutes before arrival you receive your technician's name, photo, and certifications. You know exactly who is coming to your door.
03
Your tech diagnoses the issue, then presents a flat-rate price before touching a single component. You approve, decline, or ask questions. Zero pressure.
04
97% of repairs are finished on the first visit with parts from the truck. Installs are typically scheduled within 48 hours and completed in one day.
05
Before we leave, your tech runs the system through a full operational check and walks you through what was done and what to watch for.
06
Your repair comes with a 1-year parts and labor warranty. We follow up by text the next day to confirm everything is running perfectly.
Installation day
Our install crews arrive with your system on the truck, remove and haul away the old equipment, and complete startup and testing before leaving. You come home to a working system and a clean job site.
Get a free quoteWhat homeowners say
"AC died at 9pm on the Fourth of July. Northstar had a tech at the house by 10:30 and we slept comfortably. Saved our entire weekend."
Brian H.
Anderson Township
"Got three quotes for a new furnace. Northstar was not the cheapest but they were the only company that did a real heat-loss calculation before quoting. Two winters in and the system is perfect."
Megan S.
Mason
"The maintenance plan paid for itself the first year. They caught a failing capacitor in the spring tune-up that would have cooked the compressor in July."
Devon R.
Hyde Park
"I called three other companies for an emergency on a Sunday. Northstar was the only one that actually answered. Tech was polite, fast, and upfront about the cost. Will never call anyone else."
Carla W.
Blue Ash
"They replaced our 22-year-old system and walked us through three tiers of equipment with honest payback numbers. I felt like I was talking to an engineer, not a salesperson."
Todd K.
West Chester
"The duct cleaning made a visible difference. I was skeptical but our filters are staying cleaner longer and my daughter's allergy symptoms have noticeably improved."
Sarah M.
Montgomery
The fastest way to make sure your system never dies at the worst possible moment. Members save an average of $340 a year. Cancel anytime.
No long-term contract. Cancel anytime.
A real dispatcher will pick up. A real tech will be on the way.