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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:

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 262-208-5829 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:

 

Recent Jobs and Reviews in Oconomowoc, WI

Job Locations and Reviews

Performed comprehensive furnace tune-up and identified failing inducer motor. Replaced existing thermostat with new Ecobee model. Provided customer with quotes for new furnace replacement options due to critical component failure.
Performed comprehensive furnace tune-up and identified failing inducer motor. Replaced existing thermostat with new Ecobee model. Provided customer with quotes for new furnace replacement options due to critical component failure.
Brady E.
Brady E. Checked in
Performed comprehensive furnace tune-up and identified failing inducer motor. Replaced existing thermostat with new Ecobee model. Provided customer with quotes for new furnace replacement options due to critical component failure.
Oconomowoc, WI 53066
Oconomowoc, WI - Completed maintenance service on a Heil furnace under agreement #9-11. Performed routine cleaning and inspection. System was found to be in good working condition with no issues identified.
Paul M.
Paul M. Checked in
Completed maintenance service on a Heil furnace under agreement #9-11. Performed routine cleaning and inspection. System was found to be in good working condition with no issues identified.
Oconomowoc, WI 53066
Responded to no-heat call for aging HVAC system (10+ years). Performed diagnostic inspection of furnace unit located in basement, examining internal components including wiring, mechanical parts, and ventilation system. Identified and resolved issue, restoring proper heating function to customer's home.
Responded to no-heat call for aging HVAC system (10+ years). Performed diagnostic inspection of furnace unit located in basement, examining internal components including wiring, mechanical parts, and ventilation system. Identified and resolved issue, restoring proper heating function to customer's home.
Brandon L.
Brandon L. Checked in
Responded to no-heat call for aging HVAC system (10+ years). Performed diagnostic inspection of furnace unit located in basement, examining internal components including wiring, mechanical parts, and ventilation system. Identified and resolved issue, restoring proper heating function to customer's home.
Oconomowoc, WI 53066
Responded to callback for ML 196 furnace with no heat condition. Upon inspection, confirmed unit requires replacement pressure switch which is currently on backorder. Observed significant moisture issues in basement including water staining on foundation walls and floor. Temporary solution implemented until replacement part arrives.
Responded to callback for ML 196 furnace with no heat condition. Upon inspection, confirmed unit requires replacement pressure switch which is currently on backorder. Observed significant moisture issues in basement including water staining on foundation walls and floor. Temporary solution implemented until replacement part arrives.
Brandon L.
Brandon L. Checked in
Responded to callback for ML 196 furnace with no heat condition. Upon inspection, confirmed unit requires replacement pressure switch which is currently on backorder. Observed significant moisture issues in basement including water staining on foundation walls and floor. Temporary solution implemented until replacement part arrives.
Oconomowoc, WI 53066
Oconomowoc, WI - Successfully installed two 50-gallon Bradford White electric water heaters in utility area. Units properly connected to existing plumbing system with all required electrical connections completed. Installation included securing units, connecting water lines, and verifying proper operation before completion.
Troy S.
Troy S. Checked in
Successfully installed two 50-gallon Bradford White electric water heaters in utility area. Units properly connected to existing plumbing system with all required electrical connections completed. Installation included securing units, connecting water lines, and verifying proper operation before completion.
Oconomowoc, WI 53066
Oconomowoc, WI - Completed scheduled annual preventive maintenance under CCC Quality Plan on Daikin furnace. Performed standard cleaning, replaced 20x25x4 air filter and #35 water pad. All systems operating correctly with no issues detected.
Paul M.
Paul M. Checked in
Completed scheduled annual preventive maintenance under CCC Quality Plan on Daikin furnace. Performed standard cleaning, replaced 20x25x4 air filter and #35 water pad. All systems operating correctly with no issues detected.
Oconomowoc, WI 53066
Performed annual maintenance under RenewCCC Quality Plan on Daikin furnace system. Completed comprehensive furnace tune-up with inspection of all components finding system in good working condition. Replaced 20x25x4 filter (#35) and serviced humidifier to ensure optimal system performance and indoor air quality.
Performed annual maintenance under RenewCCC Quality Plan on Daikin furnace system. Completed comprehensive furnace tune-up with inspection of all components finding system in good working condition. Replaced 20x25x4 filter (#35) and serviced humidifier to ensure optimal system performance and indoor air quality.
Brady E.
Brady E. Checked in
Performed annual maintenance under RenewCCC Quality Plan on Daikin furnace system. Completed comprehensive furnace tune-up with inspection of all components finding system in good working condition. Replaced 20x25x4 filter (#35) and serviced humidifier to ensure optimal system performance and indoor air quality.
Oconomowoc, WI 53066
Completed installation of EL297V 70K Furnace and AA 600 air conditioning system, ensuring proper leveling and ductwork connections. Visual inspection confirmed correct mounting and alignment of all components in the basement/crawlspace area, with particular attention to secure ductwork joints and proper electrical connections.
Completed installation of EL297V 70K Furnace and AA 600 air conditioning system, ensuring proper leveling and ductwork connections. Visual inspection confirmed correct mounting and alignment of all components in the basement/crawlspace area, with particular attention to secure ductwork joints and proper electrical connections.
Alex M.
Alex M. Checked in
Completed installation of EL297V 70K Furnace and AA 600 air conditioning system, ensuring proper leveling and ductwork connections. Visual inspection confirmed correct mounting and alignment of all components in the basement/crawlspace area, with particular attention to secure ductwork joints and proper electrical connections.
Oconomowoc, WI 53066
Successfully installed a Lennox EL297E 70K BTU furnace in the attic, with complete installation of PVC condensate drain lines and proper venting. Connected copper gas lines with brass fittings to the unit and installed a safety switch per manufacturer specifications. All connections were properly secured and system was tested for operation.
Successfully installed a Lennox EL297E 70K BTU furnace in the attic, with complete installation of PVC condensate drain lines and proper venting. Connected copper gas lines with brass fittings to the unit and installed a safety switch per manufacturer specifications. All connections were properly secured and system was tested for operation.
Troy S.
Troy S. Checked in
Successfully installed a Lennox EL297E 70K BTU furnace in the attic, with complete installation of PVC condensate drain lines and proper venting. Connected copper gas lines with brass fittings to the unit and installed a safety switch per manufacturer specifications. All connections were properly secured and system was tested for operation.
Oconomowoc, WI 53066
Performed scheduled prepaid maintenance service on one boiler and three furnaces under the Quality Plan. Replaced five air filters (three 20x25x4 filters and two 14x20x2 filters) that showed significant dust and debris accumulation. All systems were thoroughly inspected and serviced according to manufacturer specifications during the 5.5-hour maintenance visit.
Performed scheduled prepaid maintenance service on one boiler and three furnaces under the Quality Plan. Replaced five air filters (three 20x25x4 filters and two 14x20x2 filters) that showed significant dust and debris accumulation. All systems were thoroughly inspected and serviced according to manufacturer specifications during the 5.5-hour maintenance visit.
David H.
David H. Checked in
Performed scheduled prepaid maintenance service on one boiler and three furnaces under the Quality Plan. Replaced five air filters (three 20x25x4 filters and two 14x20x2 filters) that showed significant dust and debris accumulation. All systems were thoroughly inspected and serviced according to manufacturer specifications during the 5.5-hour maintenance visit.
Oconomowoc, WI 53066
Performed annual furnace clean and check maintenance service on residential unit with 16x25x4 filter. Inspected entire system including furnace cabinet, ductwork, ventilation components, and PVC drainage/venting. All systems functioning properly with no issues identified at this time. Recommended continuing regular maintenance schedule.
Performed annual furnace clean and check maintenance service on residential unit with 16x25x4 filter. Inspected entire system including furnace cabinet, ductwork, ventilation components, and PVC drainage/venting. All systems functioning properly with no issues identified at this time. Recommended continuing regular maintenance schedule.
Jay T.
Jay T. Checked in
Performed annual furnace clean and check maintenance service on residential unit with 16x25x4 filter. Inspected entire system including furnace cabinet, ductwork, ventilation components, and PVC drainage/venting. All systems functioning properly with no issues identified at this time. Recommended continuing regular maintenance schedule.
Oconomowoc, WI 53066
Oconomowoc, WI - Performed annual maintenance on Goodman furnace as part of customer's newly signed 2-year CCC Quality Plan agreement (previously expired since 2022). Completed regular cleaning service and noted unit is showing signs of age. Discussed condition assessment with homeowner and replaced 16x20x1 filter during service.
Paul M.
Paul M. Checked in
Performed annual maintenance on Goodman furnace as part of customer's newly signed 2-year CCC Quality Plan agreement (previously expired since 2022). Completed regular cleaning service and noted unit is showing signs of age. Discussed condition assessment with homeowner and replaced 16x20x1 filter during service.
Oconomowoc, WI 53066
Responded to no heat call for a Carrier furnace system. Diagnosed faulty inducer motor with water accumulation causing system failure. Removed water from inducer motor which restored proper operation. System functioning normally after service.
Responded to no heat call for a Carrier furnace system. Diagnosed faulty inducer motor with water accumulation causing system failure. Removed water from inducer motor which restored proper operation. System functioning normally after service.
Brady E.
Brady E. Checked in
Responded to no heat call for a Carrier furnace system. Diagnosed faulty inducer motor with water accumulation causing system failure. Removed water from inducer motor which restored proper operation. System functioning normally after service.
Oconomowoc, WI 53066
Oconomowoc, WI - Responded to customer concern regarding high energy bills. Investigated furnace operation and discovered blower motor running continuously. Inspected ductwork and confirmed damper position was incorrect, causing unnecessary system operation. Adjusted system settings to correct the continuous fan issue and restored proper operation.
Brady E.
Brady E. Checked in
Responded to customer concern regarding high energy bills. Investigated furnace operation and discovered blower motor running continuously. Inspected ductwork and confirmed damper position was incorrect, causing unnecessary system operation. Adjusted system settings to correct the continuous fan issue and restored proper operation.
Oconomowoc, WI 53066
Responded to commercial no-heat service call and diagnosed restricted condensate drainage system. Removed blockage from inducer drain line that was preventing proper furnace operation, as evidenced by mineral buildup and scale deposits. System now functioning normally with proper condensate drainage.
Responded to commercial no-heat service call and diagnosed restricted condensate drainage system. Removed blockage from inducer drain line that was preventing proper furnace operation, as evidenced by mineral buildup and scale deposits. System now functioning normally with proper condensate drainage.
Jacob K.
Jacob K. Checked in
Responded to commercial no-heat service call and diagnosed restricted condensate drainage system. Removed blockage from inducer drain line that was preventing proper furnace operation, as evidenced by mineral buildup and scale deposits. System now functioning normally with proper condensate drainage.
Oconomowoc, WI 53066
Successfully installed SLP99 90K furnace with S40 thermostat and 36B-71 cased coil in tight basement location with limited clearance. Installed new media cabinet with proper clearance from existing shelf structure and rerouted the 6" supply on top of the plenum. Completed 23ft of 2" cellular core PVC venting with four 90-degree elbows, replacing the existing exhaust pipe while maintaining proper connections through the block wall.
Successfully installed SLP99 90K furnace with S40 thermostat and 36B-71 cased coil in tight basement location with limited clearance. Installed new media cabinet with proper clearance from existing shelf structure and rerouted the 6" supply on top of the plenum. Completed 23ft of 2" cellular core PVC venting with four 90-degree elbows, replacing the existing exhaust pipe while maintaining proper connections through the block wall.
Alex M.
Alex M. Checked in
Successfully installed SLP99 90K furnace with S40 thermostat and 36B-71 cased coil in tight basement location with limited clearance. Installed new media cabinet with proper clearance from existing shelf structure and rerouted the 6" supply on top of the plenum. Completed 23ft of 2" cellular core PVC venting with four 90-degree elbows, replacing the existing exhaust pipe while maintaining proper connections through the block wall.
Oconomowoc, WI 53066
Oconomowoc, WI - Performed annual furnace maintenance under CCC Quality Plan. Identified failing heat exchanger during inspection. Provided quotes for replacement and left 16x25x1 filters for customer who will be departing for Florida soon.
Brady E.
Brady E. Checked in
Performed annual furnace maintenance under CCC Quality Plan. Identified failing heat exchanger during inspection. Provided quotes for replacement and left 16x25x1 filters for customer who will be departing for Florida soon.
Oconomowoc, WI 53066
Successfully completed a full HVAC system installation, replacing an existing Lennox Pulse system with a new SLP99 70K BTU furnace, EL18KVC 2-ton condensing unit, and 24B-71 cased coil. Upgraded PVC venting from 1.5" to 2" above drop ceiling, installed a new S40 thermostat, replaced return drop and media filter cabinet, and ensured proper electrical connections by removing old fused switch at the furnace location.
Successfully completed a full HVAC system installation, replacing an existing Lennox Pulse system with a new SLP99 70K BTU furnace, EL18KVC 2-ton condensing unit, and 24B-71 cased coil. Upgraded PVC venting from 1.5" to 2" above drop ceiling, installed a new S40 thermostat, replaced return drop and media filter cabinet, and ensured proper electrical connections by removing old fused switch at the furnace location.
Alex M.
Alex M. Checked in
Successfully completed a full HVAC system installation, replacing an existing Lennox Pulse system with a new SLP99 70K BTU furnace, EL18KVC 2-ton condensing unit, and 24B-71 cased coil. Upgraded PVC venting from 1.5" to 2" above drop ceiling, installed a new S40 thermostat, replaced return drop and media filter cabinet, and ensured proper electrical connections by removing old fused switch at the furnace location.
Oconomowoc, WI 53066
Oconomowoc, WI - Diagnosed and repaired tripped water heater circuit breaker. Investigation revealed faulty heating element which was causing breaker trips. Replaced defective heating element to restore proper function.
Jason G.
Jason G. Checked in
Diagnosed and repaired tripped water heater circuit breaker. Investigation revealed faulty heating element which was causing breaker trips. Replaced defective heating element to restore proper function.
Oconomowoc, WI 53066
Responded to no heat complaint on a Bryant Plus 90 system (10+ years old). Identified failing heat exchanger as primary cause. Performed maintenance including clearing drain trap, hoses, and pressure switch tubes to restore temporary operation. Provided homeowner with repair versus replacement options due to age of equipment and severity of heat exchanger deterioration.
Responded to no heat complaint on a Bryant Plus 90 system (10+ years old). Identified failing heat exchanger as primary cause. Performed maintenance including clearing drain trap, hoses, and pressure switch tubes to restore temporary operation. Provided homeowner with repair versus replacement options due to age of equipment and severity of heat exchanger deterioration.
Michael M.
Michael M. Checked in
Responded to no heat complaint on a Bryant Plus 90 system (10+ years old). Identified failing heat exchanger as primary cause. Performed maintenance including clearing drain trap, hoses, and pressure switch tubes to restore temporary operation. Provided homeowner with repair versus replacement options due to age of equipment and severity of heat exchanger deterioration.
Oconomowoc, WI 53066

HVAC Repair, Furnace Repair, Heating Repair, AC Installation & Electrician in Oconomowoc, WI

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Words From Around Town
After initially doing some comparison shopping, I recently made the large investment of having Pat’s install a Kohler, whole home, back-up generator. From the initial in home evaluation by Robert...
Eric M
We had our furnace replaced from Pat’s and they were fantastic. Very professional and today’s service techs were extremely helpful during the install with explaining the steps. Oh…loved the chocolates!...
Margaret O
From the beginning, everything was great. Mike Will gave us 3 estimates to choose from. Erin Halfen answered all of our questions and guided us through the financing. Alex and...
Jane K
Outstanding service with excellent communication. Salesman was professional and listened to our concerns and answered our questions thoroughly. We received both a phone call and emails detailing our appointment for...
Thomas D
We had an excellent experience with Pat’s Heating and Air Conditioning. They are extremely professional and gave us wonderful customer service from the moment that we called them. They were...
Judy C

Oconomowoc, WI