Oconomowoc is famous for its beautiful lakes – like Lac La Belle and Fowler Lake – but the area’s weather can swing from humid summers around 82.4°F to icy winters around 10.2°F. Whether your home is near South Cross Street near Downtown Oconomowoc or close to Highway 16, Pat’s Heating & Air Conditioning is here to keep you comfortable in every season.
We’ve spent over 36 years serving Southeastern Wisconsin, and we know exactly how to handle the region’s temperature extremes – from installing brand-new units to providing late-night emergency repairs.
Why Choose Pat’s Heating & Air Conditioning in Oconomowoc?
Oconomowoc is a growing city in Waukesha County, but one thing hasn’t changed: residents want fast, dependable HVAC solutions. That’s precisely what Pat’s delivers:
- Leading Expertise: With decades of hands-on experience, our technicians know the ins and outs of HVAC systems.
- Quick Call-Outs: Whether you’re by Woodlands or down near Briarwood, we arrive promptly to solve your problems.
- 24-Hour Care: We’re ready to tackle emergency issues any time – rain or shine, day or night.
- Customer Satisfaction Guarantee: We prioritize your happiness and always strive for top-notch service.
- Flexible Payment Options: We offer payment plans to make sure our services fit your budget.
Oconomowoc Air Conditioning Installation, Repair & Maintenance
Summer days in Oconomowoc can be especially hot, and temperatures sometimes climb above 82°F! When that happens, a reliable Air Conditioning Installation keeps your home cool and fresh – great for when you want to get back to a nice cool house after being out by Fowler Lake.
Got an existing AC unit? Our repair and maintenance services are available around the clock. We’ll make sure your system runs efficiently so you can relax indoors after a stroll along the Lake Country Trail.
Reliable Ductless HVAC Solutions in Oconomowoc
For homeowners who’d rather skip extensive ductwork, Ductless HVAC Installations deliver zoned heating and cooling exactly where you need it.
Our technicians can install sleek wall-mounted units in any room, so we don’t take up too much floor space and can cut down on your energy usage. Whether you live in a cozy historic house near Main Street or a modern condo near Pabst Farms, ductless systems are a versatile choice.
VRF Systems for Your Oconomowoc Home
Variable Refrigerant Flow (VRF) systems are an increasingly popular choice around Oconomowoc’s suburban neighborhoods. They switch from heating to cooling without skipping a beat – perfect for Wisconsin’s erratic weather patterns!
Pat’s expert team will evaluate your home’s layout and recommend the best VRF solution so you can always enjoy a balanced indoor climate.
Comprehensive Heating Solutions Across Oconomowoc
When winter comes knocking, temperatures can dip below freezing, especially if you’re out by Okauchee Lake or near the outskirts of Waukesha County.
Pat’s is your all-in-one provider for heating services in Oconomowoc, whether you need an urgent repair or a full system overhaul.
24/7 Heating Repairs
If your boiler starts acting up after a day of ice skating on Fowler Lake, don’t stress – our factory-trained pros are just a phone call away. We’ll be there to troubleshoot the issue and make honest recommendations to keep your heating costs manageable.
Boiler & Radiant Heating Installation & Maintenance
A quality boiler or radiant heating system can help you handle those frigid Wisconsin nights. Whether you’re considering an upgrade or just need routine service, we install new units that suit your property and follow up with regular maintenance to keep your system in great shape.
Heat Pump Services
A heat pump offers an all-in-one solution for:
- Heating and Cooling
- Cutting Down on Energy Bills
- Providing Reliable Comfort
Pat’s will help you select and install the right heat pump for your home – perfect for tackling Oconomowoc’s humidity during the summer and warming your space when the snow piles up in winter.
Hybrid Heating Technology
Need a bit more power when the thermometer dives? Our Hybrid Heating Service combines a heat pump with a furnace, guaranteeing a cozy home even on those bitterly cold nights near Rosenow Creek or Lake Drive. It’s an efficient, cost-effective way to keep your family comfortable!
Superior Air Purification Solutions
Indoor air can hide the following pollutants that aggravate allergies:
- Pollen
- Dust
- Other Particulates
Pat’s offers Air Purification Solutions to help clear the air, which is a relief for families living near the city’s bustling center or by the scenic waterfront. We install top-grade filters, as well as humidifiers and dehumidifiers, to help maintain optimum moisture levels all year long.
State-of-the-Art Temperature Control in Oconomowoc
Take charge of your home’s climate with our modern smart thermostats. You’ll be able to monitor and adjust temperatures from anywhere – especially handy if you’ve just spent the day shopping around downtown Oconomowoc and want to return to a perfectly set home environment. Plus, zoning control gives you the power to regulate different rooms individually, saving you energy and costs.
Commercial Services for Local Oconomowoc Businesses
Pat’s also supports the many enterprises around Oconomowoc – whether you’re located near Lake Drive or around Wisconsin Avenue. Our Commercial HVAC Services cover everything from new installations to maintenance on existing systems, helping keep your workspace productive and comfortable for employees and customers alike.
Trusted Electrical Services in Oconomowoc
HVAC isn’t our only specialty. We provide a range of Electrical Services for homes and businesses across Oconomowoc:
- Circuit Breaker Installation
- Electrical Panel Upgrades
- EV Chargers
- Fans & Fixtures
- Smoke and Carbon Monoxide Detectors
- Generator Services
Contact Pat’s Team Today!
Got a furnace emergency near Lake Drive? Need an AC tune-up by the Oconomowoc River? Pat’s Heating & Air Conditioning is standing by. Call (262) 315-3095 or fill out our online form, and we’ll get back to you promptly. Experience the same expert service that thousands of satisfied customers in Oconomowoc already trust!
We offer the following services (and more!) in Oconomowoc, WI:
Pat’s Heating & Air Conditioning has completed 20 jobs in Oconomowoc, WI in October 2026. The most recent job was on October 23, 2026. Pat’s Heating & Air Conditioning has completed 744 jobs in Oconomowoc, WI in the last 12 months.Recent Jobs and Reviews in Oconomowoc, WI
Oconomowoc, WI at a glance
Job Locations and Reviews
Removed the existing furnace, air conditioner, and evaporator coil and installed a complete new split system consisting of a furnace, AC condensing unit, and matching coil. Connected the refrigerant lines, charged the system, and verified performance using gauges and a digital thermometer. Installed and configured a new Honeywell Home FocusPRO P200 thermostat, confirmed proper heating operation, and left the system running as designed.
Performed a seasonal heating tune-up on an 11-year-old Goodman gas furnace, inspecting the cabinet, venting, and condensate and PVC flue connections and checking components related to the customer's reported intermittent ignition. Verified proper operation of the unit and surrounding ductwork, and found no visible rust, cracks, or damage; the system is ready for the heating season.
Responded to a no-heat call on a 10+ year old hydronic heating system and inspected the exterior PVC vent/intake termination, which was clear of obstructions, frost, or damage. Found the boiler supply/return piping valve with a corroded handle secured in position with zip ties, and verified valve position and operation to restore proper flow. Heating system returned to service.
Performed annual heating maintenance on an aging Bryant furnace, including inspection of the thermostat and verification of proper heat call and system operation. Visually inspected the cabinet, plenum and ductwork, refrigerant lines, condensate drain piping, and electrical conduit connections, with no visible damage or abnormal conditions noted. Reviewed replacement options for the aging equipment and discussed budgetary expectations for a future system upgrade.
Performed prepaid annual tune-up on a Thermo Pride oil-fired furnace, replacing the burner nozzle (0.85/80A) and the 264 oil filter, and cleaning and inspecting the electrodes and cad cell. System operated properly with no deficiencies found, though the equipment is aging; recommended retaining the natural gas service and obtaining a quote for replacement equipment.
Installed a new gas furnace in the basement mechanical area, reusing the existing media filter cabinet, return drop, zoning controls, thermostats, and 2" solid core PVC, and connecting it to the existing side-mounted cased coil. Piped the PVC intake, exhaust, and condensate drain, then terminated and verified the low-voltage control wiring at the furnace control board. The electrical panel has a 20 amp breaker where a 15 amp is required, so an electrician is needed to swap it.
Performed annual fall tune-up on one gas furnace under the maintenance plan, including inspection of components and verification of normal operation. Inspected the furnace humidifier and found the evaporator pad heavily scaled with mineral deposits and staining. Replaced the 20x25x5 filter and recommended pad replacement, with the condensate drain line and fittings checked and secure.
Performed a full inspection of a leaking Richmond Integra gas tanked water heater and found moisture and staining on the concrete floor at the base of the unit, confirming the tank has failed and is beyond economical repair. Recommended replacement of the water heater and provided a quote for the replacement unit.
Performed scheduled maintenance on one gas furnace under the service agreement, including a visual inspection of internal components. Used a borescope inspection camera to examine the heat exchanger and internal passages for signs of cracks, corrosion, or blockages, and documented the findings with photos. System was left in proper working order.
Performed annual preventive maintenance on the gas furnace, including visual inspection of the heat exchanger with a borescope camera and an overall check of the unit, flue venting, and surrounding ductwork. Replaced the 16x25x1 air filter and confirmed renewal of the customer's annual maintenance plan, which includes discounts on parts, repairs, and filters and covers the upcoming A/C tune-up.
Installed a new furnace, air conditioner condenser, evaporator coil, and Aprilaire power humidifier, replacing the existing units. Modified the return drop and fabricated custom ductwork transitions to adapt the existing trunk lines to the new equipment, relocated two 6" round supply runs, and upsized the PVC condensate/venting from 2" to 3". Reused the existing Carrier air purifier, reconnected controls and wiring, and removed unused circuits, with dedicated circuits run for the new AC unit and furnace by an electrician.
Responded to a boiler leak on startup and diagnosed the expansion tank and pressure relief valve as failed and the source of the leak. Inspected the boiler piping, flue, zone valves, and discharge line, with a drip tray in place to contain discharge. Documented system conditions with photos and prepared a repair quote for replacement of the expansion tank and relief valve.
Responded to an install call back for a leak and ran the furnace to locate the source, which was found at the condensate drain line connections. Repaired the leaking drain by re-securing the PVC fittings at the furnace cabinet penetration, and verified proper drainage and a leak-free system during operation.
Performed a pre-winter inspection of the gas-fired hydronic boiler system in response to reported inadequate heating and a slow leak. Found the original 2014 Amtrol expansion tank leaking at the top fitting, with heavy corrosion and mineral buildup on the tank and surrounding copper piping and fittings, and noted water staining at the base of the boiler. Documented conditions with photos; the expansion tank and other components require replacement, and a repair quote is being prepared.
Performed a prepaid annual tune-up on a Goodman gas furnace, inspecting the burners, gas valve, inducer and blower assemblies, wiring, and condensate drainage components. During inspection, a cracked front fascia of the heat exchanger was identified. The finding has been forwarded to sales for a free replacement quote.
Installed a Reznor gas-fired unit heater in the corner of a 633 sq ft garage, coordinated with the electrician for the electrical connection to the existing ceiling outlet. Connected the previously trenched underground gas line (approx. 62 ft from meter, with two risers) to hard piping inside the garage, and installed a short side-wall vent run of less than 5 ft.
Responded to a no-heat call on a 10+ year old Bryant upright gas furnace displaying a three-blink fault code, then diagnosed the cause of the lockout and verified proper operation of the unit. After restoring the system, confirmed normal ignition sequence, burner operation, and heated airflow through the supply ductwork, with the furnace cycling properly at completion.
Responded to a no-heat call at a Plus 90 condensing gas furnace and inspected the unit, including the condensate drain, PVC venting, and associated piping, for the reported water leak inside the equipment closet. Found a heavily soiled return air filter restricting airflow and replaced it, and cleared and secured the condensate drain components to correct the leak and restore normal heating operation.
Replaced the existing bathroom exhaust fan with a new ventilation unit, installing it flush in the ceiling opening with the grille and integrated LED light panel secured in place. Reconnected the electrical supply, verified proper fan and light operation, and confirmed the installation was clean and secure.
Responded to a no-heat call on a 20-year-old Carrier upright gas furnace and performed a full diagnostic of the unit, including inspection of the cabinet, supply plenum, ductwork, condensate drain assembly, and PVC venting. No visible frost, rust, or equipment damage was observed at the furnace. Verified the unit's operating condition and documented the installation with photos.
