Furnace repair · installation · tune-ups
Furnace repair and installation in Milwaukee
No heat is the call we take most, and the one we move on first. Fast repair on every brand, usually same day; high-efficiency Lennox and Rheem installs; and a written price before any work starts.
★ 4.9 on Google · 440+ reviews | BBB A+ Accredited | Wisconsin-registered HVAC contractor | Veteran-owned | Since 2014
Flat-rate price first
You approve the number before work starts
24/7 emergency line
Rings Mike’s cell, nights and weekends
Free replacement estimates
Written proposal with options, same day
Lennox & Rheem dealer
Every brand serviced and repaired
Furnace repair, usually same day
A furnace that won’t light, short-cycles, blows cold air or keeps tripping its limit is almost always one of a dozen known failures: a flame sensor, ignitor, pressure switch, inducer motor, blower motor, control board, gas valve or a clogged condensate drain. We carry the common parts for Lennox, Rheem, Carrier, Trane, Goodman, York and Bryant on the truck, so most repairs are finished on the first visit.
- A $99 weekday service call ($179 nights, weekends and holidays), then a flat-rate repair price you approve before we start
- Real readings on paper: temperature rise, gas pressure, flame signal and static pressure, so you can see why we recommend what we recommend
- An honest repair-or-replace answer using the checklist we publish, not a sales pitch
- Every brand and type: 80% and 90%+ furnaces, single-stage, two-stage and modulating
- Every repair guaranteed for one year, parts and labor
Furnace replacement, sized for your house, not the old label
A new furnace should be sized with a load calculation, not by copying the number off the old one. Oversized furnaces short-cycle, run loud and leave rooms uneven. We measure first, then propose two or three Lennox or Rheem options in writing, from a solid 80% unit to a 96%+ two-stage or modulating system, with the price, the warranty and any rebate for each.
- Free in-home estimate, about 45 minutes, written proposal the same day
- Permit pulled and inspection scheduled when required; venting, gas and electrical done to code
- Old equipment hauled away, new system started up, tested and documented, thermostat set up and explained
- 10-year parts and labor warranty on Lennox and Rheem installs registered with the manufacturer; $500 off a furnace install, or $1,000 off a furnace and AC together
The $89 Precision Tune-Up
Once a year, before heating season. We clean the burners and flame sensor, inspect the heat exchanger, test ignition and safety controls, measure gas pressure and temperature rise, check the blower, filter and condensate drain, and leave you a written report. It is the cheapest heat insurance you can buy, and many manufacturer warranties expect yearly professional maintenance, so keep the report with your warranty papers.
Recent furnace jobs
Photos from our own jobs, not stock images.
Emergency right now? Call or text 414-595-5175, any hour.
Request service or a free replacement estimate
We call you back during business hours. You get a flat-rate price before any work begins, and repairs are guaranteed for one year, parts and labor.
Rather pick a time yourself? Book a tune-up, free estimate or repair visit online, any time of day.
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What it costs
- Service call (diagnosis): $99 weekdays 7 a.m. to 5 p.m.; $179 nights, weekends and holidays
- Repairs: flat-rate, approved before work starts, guaranteed 1 year parts and labor
- Precision Tune-Up: $89
- Replacement estimate: free, in writing
- New furnace: $500 off, or $1,000 off with a new AC; 0% APR for 18 months on qualifying installs, on approved credit through Marine Credit Union, no down payment, 18 equal monthly payments
- Milwaukee-area average for a new gas furnace: $3,000 to $9,000 installed (price guide)
How it works
What happens when you call A-1
1
You call or text, any hour
A person answers 414-595-5175, not a call center. We ask a few quick questions and give you a real arrival window, not a guess.
2
We find the actual problem
We test before we replace anything and show you the readings, so you can see what failed and why.
3
You approve a flat-rate price
You get the price before any work starts, with repair and replacement options in writing when both make sense. No hourly surprises.
4
We fix it, test it and clean up
Most repairs are finished on the first visit. We test the system, clean up after ourselves and explain what we did.
Specials, financing and rebates
Comfort you can afford, all year.
Everyday offers with no expiration date. Mention the one you want when you book; details are on the Specials page.
$89
Precision Tune-Up
Furnace or AC. A full safety and efficiency check before the season hits, with a written report of what we found. Book it online.
$500 off
A new furnace or AC install
Lennox and Rheem high-efficiency systems, installed to code and permitted when required, with our 10-year parts and labor warranty on installs registered with the manufacturer.
$1,000 off
Furnace + AC bundle
Replace both at once and save $1,000 instantly on a qualifying high-efficiency furnace and air conditioner package.
0% APR for 18 months
Through Marine Credit Union on qualifying installs, on approved credit; no down payment, 18 equal monthly payments. Wells Fargo and our in-house plan are also available.
Already have a replacement quote? Get a free second opinion.
We will give you our own written replacement estimate, free. If we think a repair makes more sense than a new system, we will tell you.
Never think about a tune-up again: join the A-1 Comfort Club.
A yearly maintenance visit for each system and priority on no-heat and no-cool days, plus 15% to 20% off repairs on the higher plans. From $150 a year for one system.
Why Milwaukee calls A-1
Big-company standards. Local-shop accountability.
Flat-rate pricing, quoted first
You approve the number before a tool comes off the truck. No hourly surprises, no upselling.
24/7, and no call center
After-hours calls ring Mike’s cell, not a call center. If he is on another call, text or leave a message and you hear back quickly.
Authorized Lennox and Rheem dealer
Factory-backed equipment and warranties, and we service every brand you already own: Carrier, Trane, Goodman, York, Bosch, Mitsubishi and more.
Repairs guaranteed 1 year, installs 10
Every repair is guaranteed for one year, parts and labor. New Lennox and Rheem installs registered with the manufacturer carry a 10-year parts and labor warranty, with limited lifetime heat exchanger coverage on select models.
State-registered, veteran-owned
Wisconsin Registered HVAC Contractor #1304500, BBB A+ accredited, NATE-certified technicians, and a crew of eight with 115+ years in the trade. One shop in South Milwaukee since 2014.
4.9 stars from 440+ neighbors
Every review is public, including the critical ones, and we reply to them. Judge us by the whole record.
Good to know
Frequently asked questions
How fast can you get here for no heat?
Same day in most cases, and often within a couple of hours inside Milwaukee County. Nights, weekends and holidays, the emergency line rings Mike’s cell, not a call center.
Should I repair or replace my furnace?
Replace it if the heat exchanger is cracked, if the repair costs more than half of a new system on a unit that is 15+ years old, or if it has needed two or three service calls in one winter. Repair it if one common part failed on an otherwise sound furnace, or the fix is a fraction of replacement and buys real years. We put the reasoning on paper before you pay for anything.
What furnace brands do you install?
New furnaces: Lennox and Rheem. We are an authorized dealer for both, which means factory-backed equipment and warranties registered in your name. Repairs: every brand you already own, including Carrier, Bryant, Trane, Goodman, Amana and York.
Do you pull permits?
Yes, whenever the work requires one, and most municipalities in Milwaukee and Waukesha counties require one for a furnace replacement. We pull the permit, schedule the inspection and include the cost in your written price.
Is a high-efficiency furnace worth it in Milwaukee?
Usually. In a Milwaukee winter a 96% furnace burns noticeably less gas than an 80% unit, and it qualifies for rebates the 80% unit does not. We show you the operating-cost difference with real numbers, and we will tell you when the cheaper unit is the smarter buy, for example in a house you plan to sell soon.
How much does a new furnace cost in Milwaukee?
Most Milwaukee-area gas furnace replacements run $3,000 to $9,000 installed, according to 2026 Milwaukee figures from HVAC Project Cost, a cost-estimate website: about $3,000 to $5,500 for a standard 80% furnace, $4,500 to $7,500 for a 96% two-stage model, and $6,000 to $9,000 for top-tier variable-capacity models. Those are area averages, not our quotes. Your price depends on the furnace, venting, ductwork and permit, and you get it in writing after a free in-home estimate. Sources and details are in our Milwaukee HVAC price guide.
Are your repairs guaranteed?
Yes. Every repair is guaranteed for one year, parts and labor. If something we fixed fails within that year, call us and we make it right at no charge.
Reviews
What furnace customers say
Word-for-word excerpts from Google reviews, names shortened. Overall: 4.9 stars from 440+ reviews.
5 out of 5 stars
“Had two big companies out to tell me I needed a new furnace to which Brian there tech fixed the problem with 15mins! Most honest company I have dealt with…”
Leonard T. · Furnace repair · Google review
5 out of 5 stars
“They came out to look at an issue with my furnace and were very professional and honest throughout the process. After inspecting the problem, they gave me a fair price for the repair…”
Andrew H. · Furnace repair · Google review
5 out of 5 stars
“I needed a new furnace fast as it is in single digits. They were able to put in new for me within a day of mine dying.”
Heather M. · Furnace replacement · Google review
Read them all on Google
These are a few highlights. Google shows every review, including the critical ones, and we reply to them. Judge us by the whole record.
Ready when you are: