Home › Service areas › Sussex
Serving Sussex · Waukesha County
Furnace and AC repair in Sussex, WI
Sussex has grown from a village founded in 1924 into a steady Waukesha County bedroom community, with 1990s and 2000s builder-grade systems now reaching replacement age. We find the real cause and give you a flat-rate price before any work starts.
★ 4.9 on Google · 440+ reviews | BBB A+ Accredited | Wisconsin-registered HVAC contractor | Veteran-owned | Since 2014
About 40 minutes away
From our shop in South Milwaukee
Same-day in most cases
No-heat and no-cool calls get priority
Flat-rate price first
You approve the number before work starts
24/7 emergency line
Rings Mike’s cell, nights and weekends
What we see in Sussex homes
Sussex has been a village since 1924, though the area was settled back in 1843, and it has grown steadily as a Waukesha County bedroom community ever since. The result is a real mix: a handful of older homes near the original village center, mid-century houses, and subdivisions built from the 1970s right up through today. In the newer subdivisions, builder-grade furnaces and air conditioners from the 1990s and 2000s are reaching the age where repairs get more frequent and more expensive.
Two-story homes built in the last few decades commonly run on one system sized for the whole house, which tends to leave the upstairs bedrooms warm in summer no matter how low the thermostat goes. Older homes near the village center sometimes still have original ductwork that was never sized for central air, which shows up as weak airflow in the rooms furthest from the furnace.
What we do in Sussex
Furnace repair and replacement, 80% and high-efficiency
Central AC and heat pump repair and replacement
Airflow fixes for warm upstairs bedrooms and rooms far from the furnace
Ductwork, airflow and duct cleaning →
Furnace repair and installation →
Ductless mini-splits for additions, bonus rooms and finished lower levels
Water heaters and whole-home humidifiers
How we work in Sussex
We find the real cause before we talk about parts, show you the readings, and give you a flat-rate price before any work starts. When a builder-grade system is near the end, we put the repair-or-replace numbers on paper; new equipment is sized with a load calculation instead of copied off the old label.
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.
Thanks. We got your request.
By submitting you agree we may call or text you about your request. No spam, ever.
Nearby areas we serve
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.
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.
Good to know
Sussex questions we hear most
Is Sussex really in your service area?
Yes. It’s about 40 minutes from our South Milwaukee shop, and the service call costs the same as anywhere else we work: $99 on weekdays, $179 nights, weekends and holidays, with a flat-rate repair price you approve first.
Our two-story’s upstairs bedrooms are always the warmest rooms in the house. Is that normal?
It’s common, but it’s fixable. We measure the airflow first; the usual fix is more return air, duct balancing or zoning, and only rarely a bigger air conditioner.
How fast can you get to Sussex?
About 40 minutes from our South Milwaukee shop. No-heat calls get priority, we give you a real arrival window when you call, and the emergency line is answered 24/7.
Reviews
What our customers say
Word-for-word excerpts from Google reviews, names shortened. Overall: 4.9 stars from 440+ reviews.
5 out of 5 stars
“Called A1 to service my AC unit, Mike was very thorough and walked me through step by step what the issue was.”
Daniel P. · AC service · Google review
5 out of 5 stars
“Friendly, knowledgeable And helpful. Mike came quickly to assess the situation and indicated what he thought was the problem and what I should do moving forward”
Rita M. · Diagnosis · Google review
5 out of 5 stars
“He explained everything he was doing along the way as we coordinated while out of town.”
Kelly R. · Furnace and AC · 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: