HVAC Services in Lake Geneva, WI

More Than 20,000 HVAC Clients Served Since 1978

Since 1978, our team at H.J. Faust, Inc. has kept homes and businesses comfortable across Lake Geneva and Walworth County. More than 20,000 clients have turned to us for work ranging from routine tune-ups and emergency repairs to full system replacements and larger HVAC projects.

As an HVAC company serving Lake Geneva, we handle heating, air conditioning, preventive maintenance, indoor air quality, and 24/7 emergency response. We also provide design-build projects, new construction support, system upgrades, and sheet metal fabrication for residential and commercial customers.

Call H.J. Faust, Inc. today at (262) 418-0700 to schedule HVAC service in Lake Geneva. Our NATE-certified technicians are available around the clock, including for after-hours emergencies.

Essential Air Conditioning Services for Lake Geneva Homeowners

When summer temperatures climb, a well-functioning air conditioner isn’t a luxury. If yours is underperforming, our AC services can address repair, installation, and replacement needs. We install Lennox systems and service all major brands, including Carrier, Daikin, Goodman, Honeywell, Trane, and Bryant.

Before recommending any course of action, our technicians start with a thorough inspection. We don’t suggest more than your system actually requires.

AC Repair

Is your air conditioner blowing warm air, making strange noises, or leaking water? Refrigerant leaks, faulty capacitors, clogged drain lines, and sensor problems can cause these symptoms. Our certified technicians inspect the system, explain what they find, and provide AC repair for all major brands.

AC Installation & Replacement

If your air conditioner is 10 to 15 years old, requires frequent repairs, or struggles to cool your home, replacement may be worth considering. We inspect your existing system first and walk you through the numbers honestly: repair costs versus replacement costs, so you can make the right call for your budget. We can also discuss properly sized Lennox equipment and other installation considerations for your home.

Heating Services Designed to Keep You Comfortable in Lake Geneva

Walworth County winters push temperatures well below freezing, and a heating system that fails mid-January isn’t a minor inconvenience. Our technicians handle furnace repair, heat pump repair, boiler systems, heating maintenance, and full heating installations. Our NATE-certified, factory-trained technicians meet nationally recognized standards in heating, cooling, ventilation, and refrigeration.

Whether you’re dealing with a pilot light that won’t stay lit, a furnace blowing cold air, or a heat pump making grinding noises, our technicians can inspect the equipment and recommend the appropriate repair. Call us any time for furnace and heat pump repairs in Lake Geneva, including nights and weekends.

Heating Installation & Replacement

An aging heating system can mean inconsistent temperatures, rising energy bills, and safety concerns, including carbon monoxide risks. We inspect your current equipment before making any recommendation. If repair makes sense, we can say so. When replacement is the right move, we install modern furnaces and heat pumps sized to your home and configured for the Wisconsin climate. We provide a straight answer, not a sales pitch.

Heating Maintenance

We recommend a fall check-up for your heating system every year before the cold sets in. Regular maintenance by our NATE-certified technicians can identify developing problems, support efficient operation, and reduce the risk of an unexpected mid-season breakdown. It’s a practical way to prepare your furnace or heat pump for winter.

Annual Maintenance Agreement

Our Annual Maintenance Agreement takes the guesswork out of seasonal upkeep. The program includes a spring AC check-up and a fall furnace check-up, a 30-point inspection at each visit, priority scheduling, and no overtime charges for after-hours calls. When repairs are needed, members receive a 10% discount on all parts and labor. Wisconsin’s four-season climate puts real stress on both heating and cooling equipment, and this twice-yearly schedule aligns service with the spring cooling and fall heating seasons.

Emergency HVAC Services in Lake Geneva, WI

HVAC emergencies don’t wait for business hours. We offer 24/7 emergency HVAC service in Lake Geneva for sudden cooling breakdowns during a summer heat wave, furnace failures on cold winter nights, and other urgent heating or cooling problems. Annual Maintenance Agreement members pay no overtime charges for after-hours emergency calls.

Frequently Asked Questions

Why Did My Energy Bill Suddenly Increase?
A sudden spike can result from your HVAC system working harder than it should. Common causes include a dirty filter, a refrigerant leak, or an aging component reducing system efficiency. A diagnostic visit can identify what’s affecting your system.

Why Is My HVAC System Making Strange Noises?
The type of noise matters. Banging can point to a loose part, squealing may indicate a belt issue, and grinding can signal motor or bearing failure. If you hear unusual sounds, shut the system off and call us for an inspection.

What Is HVAC Zoning?
HVAC zoning divides your home into independently controlled temperature areas, each with its own thermostat. You can heat or cool only the rooms in use, which can improve comfort and reduce energy costs in larger or multi-level homes.

Technician Training & HVAC Service Standards

Since 1978, we’ve served more than 20,000 clients. Our Excellent rating based on more than 1,279 Google reviews reflects customer feedback on our promptness, clear communication, and thorough work. We’re also BBB accredited.

Our NATE-certified technicians are also factory-trained, fully licensed, and insured. Our mechanics train through the state-approved Associated Builders & Contractors Apprentice Program, a five-year curriculum that combines classroom instruction with hands-on field work under direct Senior Mechanic supervision. Every field and office employee completes a minimum of four training sessions per year.

Honest service is a policy, not a tagline. We inspect before we recommend, and we don’t suggest more than your system actually requires. We install Lennox systems and service all major brands, so our guidance starts with the condition of your equipment and your service needs.

For HVAC repair, replacement, maintenance, installation, or emergency service in Lake Geneva, contact our technicians at (262) 418-0700 today.