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HVAC guides for Milwaukee homeowners
Straight answers to the problems we get called about most, written by the people who fix them. Try the safe checks first. If they do not solve it, call or text 414-595-5175, any hour; it rings Mike’s cell.
★ 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
Start with the problem you have
Troubleshooting guides
Each guide lists the safe checks first, then what a technician tests and why.
No heat at all
Furnace Not Turning On? What to Check Before You Call (Milwaukee)
The thermostat, switch, breaker, filter, door switch and condensate checks to do before you call.
Furnace keeps shutting off
Furnace Turning On and Off Every Few Minutes (Short Cycling)
Runs a few minutes, stops, starts again. The usual causes, from airflow to an oversized furnace.
Boiler on, radiators cold
Boiler Running but Radiators Cold? (Milwaukee Homes)
Air in the system, low pressure, a failed circulator, a stuck zone valve or bad steam vents.
Repair or replace?
Repair or Replace the Furnace? How We Actually Decide
How we actually decide: heat exchanger, age, repair cost, repeat failures and parts.
AC not cooling
AC Not Cooling? What to Check Before You Call (Milwaukee)
Thermostat, breakers, filter, the outdoor unit, ice and the condensate drain, in the order we check them.
No hot water
No Hot Water? Water Heater Checks Before You Call
Gas or electric, pilot and status lights, breakers, power-vent plugs, leaks, and when to replace.
Furnace noises
Furnace Making Noise? What Each Sound Usually Means
Bangs, rumbles, squeals, clicks, rattles and hums: which are wear and which need a call today.
Furnace blowing cold air
Furnace Blowing Cold Air? Causes and What to Check First
Fan setting, filter, status light, condensate drain and gas supply, then the parts that usually fail.
Furnace leaking water
Furnace Leaking Water? Why It Happens and What to Do
Condensate drains, pumps, frozen lines, humidifiers, the AC coil, and the venting problem that is serious.
Carbon monoxide alarm
Carbon Monoxide Alarm Going Off? What to Do, and What We Check
What to do first, alarm versus chirp, the usual causes in Milwaukee homes, and Wisconsin’s alarm rules.
Furnace filters
How Often to Change a Furnace Filter, and Which One to Buy
How often to change it, which MERV rating to buy, the right size, and which way the arrow points.
Whole-home humidifiers
Whole-Home Humidifiers in Milwaukee: Do You Need One, and What It Costs
Bypass, fan-powered or steam, the right humidity for a Milwaukee winter, what it costs and the yearly upkeep.
What it costs
What HVAC Work Costs in Milwaukee: 2026 Price Guide
Milwaukee-area price ranges for furnaces, AC, boilers, mini-splits and water heaters, with sources, plus our $89 tune-up and install offers.
Need it fixed?
Go straight to the service
Furnace repair and installation
Furnace not heating, noisy or old? Repairs, tune-ups and replacements.
Air conditioning
Warm air, ice on the lines or a unit that won’t start.
Heat pumps and dual fuel
Keep your furnace and add a heat pump that cools all summer and heats on milder days.
Boilers and radiators
Hot-water and steam boilers, radiators and zone valves.
Ductless mini-splits
Heat and cool a room or addition without ductwork.
Water heaters
No hot water, leaks, and tank or tankless replacements.
Ductwork, airflow and duct cleaning
Rooms that never heat or cool evenly, and duct cleaning.
Whole-home humidifiers
Dry winter air, static shocks and cracking woodwork.
Commercial HVAC
Rooftop units and light commercial equipment.
24/7 emergency service
No heat at night or on a weekend. Calls ring Mike’s cell.
When to stop and call
- You smell gas. Leave the house first, then call 911 or your gas utility from outside.
- A carbon monoxide alarm goes off. Get everyone outside and call 911.
- A breaker trips again after you reset it.
- Water is leaking near the furnace, boiler or water heater.
- It is below freezing and you have no heat. Pipes can freeze in hours.
For everything else, the guides above cover the checks that are safe to do yourself. If those do not fix it, we test before we replace anything, show you the readings, and give you a flat-rate price before any work starts.
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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The shop
3206 9th Ave, South Milwaukee, WI 53172
Installs, estimates and non-urgent repairs: Monday to Friday, 7 a.m. to 5 p.m., weekends by appointment. Emergencies: 24/7, any day.
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
Before you call
Can I fix my furnace myself?
Some problems, yes: a clogged filter, a switch or breaker that got turned off, a thermostat setting, a blocked outdoor vent pipe or a clogged condensate line. The guides walk through those checks. Anything inside the burner compartment, the gas valve, the control board or the refrigerant side of an air conditioner is work for a trained, certified technician.
When should I stop troubleshooting and call?
If you smell gas, leave the house first and call 911 or your gas utility from outside. If a carbon monoxide alarm goes off, get everyone outside and call 911. Call us right away if a breaker trips again after you reset it, or if water is leaking near the furnace or boiler. In winter, do not wait out a no-heat problem; pipes can freeze in hours.
Do you answer at night and on weekends?
Yes. The emergency line rings Mike’s cell 24/7, any day of the year. If he is on another call, leave a message or text and you hear back quickly. Call or text 414-595-5175.
Reviews
4.9 stars from 440+ Milwaukee neighbors.
5 out of 5 stars
“They were able to come out within 2 hours of calling them. Mike walked me through the entire repair and made sure I understood what he was doing. Price was fair and communication was excellent.”
Chris D. · Repair · Google review
5 out of 5 stars
“Called on a Saturday and they gave me a time. We were able to get our furnace going ourselves. We called and canceled and he said that is fine and asked what we did. He told us he would have done the same.”
A. C. · Weekend furnace call · Google review
5 out of 5 stars
“Had the new furnace completely installed in less than 24 hours. Polite installers, left zero mess. Price was fair.”
Deb V. · 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: