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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

Installed Lennox ML296V 45K BTU high-efficiency furnace to replace existing unit. Added secondary 2" PVC pipe for proper venting configuration, reusing existing cellular core pipe for intake. Verified electrical requirements and noted shared circuit status for future dedicated circuit installation. Removed indoor AC coil as requested and confirmed non-operational status of outdoor condensing unit. System properly leveled and tested for operation.
Installed Lennox ML296V 45K BTU high-efficiency furnace to replace existing unit. Added secondary 2" PVC pipe for proper venting configuration, reusing existing cellular core pipe for intake. Verified electrical requirements and noted shared circuit status for future dedicated circuit installation. Removed indoor AC coil as requested and confirmed non-operational status of outdoor condensing unit. System properly leveled and tested for operation.
Alex M.
Alex M. Checked in
Installed Lennox ML296V 45K BTU high-efficiency furnace to replace existing unit. Added secondary 2" PVC pipe for proper venting configuration, reusing existing cellular core pipe for intake. Verified electrical requirements and noted shared circuit status for future dedicated circuit installation. Removed indoor AC coil as requested and confirmed non-operational status of outdoor condensing unit. System properly leveled and tested for operation.
Oconomowoc, WI 53066
Responded to service call for exterior outlet issues. Diagnosed faulty timer causing breaker to trip and identified broken in-use cover. Disconnected timer and reset breaker to restore functionality. Offered replacement of damaged covers, which customer declined for now.
Responded to service call for exterior outlet issues. Diagnosed faulty timer causing breaker to trip and identified broken in-use cover. Disconnected timer and reset breaker to restore functionality. Offered replacement of damaged covers, which customer declined for now.
Jason G.
Jason G. Checked in
Responded to service call for exterior outlet issues. Diagnosed faulty timer causing breaker to trip and identified broken in-use cover. Disconnected timer and reset breaker to restore functionality. Offered replacement of damaged covers, which customer declined for now.
Oconomowoc, WI 53066
Oconomowoc, WI - Performed annual preventative maintenance on Carrier furnace per CCC Quality Plan agreement. Identified and replaced dirty 16X25X4 air filter. System operational after service completion.
Brady E.
Brady E. Checked in
Performed annual preventative maintenance on Carrier furnace per CCC Quality Plan agreement. Identified and replaced dirty 16X25X4 air filter. System operational after service completion.
Oconomowoc, WI 53066
Oconomowoc, WI - Performed comprehensive furnace tune-up on aging unit per customer request. Inspected burner assembly, heat exchanger, and electrical connections for proper operation. System is functional but showing signs of normal wear; customer was informed of current condition and recommendations.
Paul M.
Paul M. Checked in
Performed comprehensive furnace tune-up on aging unit per customer request. Inspected burner assembly, heat exchanger, and electrical connections for proper operation. System is functional but showing signs of normal wear; customer was informed of current condition and recommendations.
Oconomowoc, WI 53066
Oconomowoc, WI - Performed regular maintenance cleaning on Bryant furnace under CCC agreement. Inspected system components and ductwork. Unit is functioning properly with no issues noted.
Paul M.
Paul M. Checked in
Performed regular maintenance cleaning on Bryant furnace under CCC agreement. Inspected system components and ductwork. Unit is functioning properly with no issues noted.
Oconomowoc, WI 53066
Responded to service call for LP furnace struggling to maintain temperature. Performed comprehensive tune-up on Daikin furnace system, including inspection of ductwork connections, PVC venting, and condensate lines. Verified proper operation of furnace and resolved performance issues as requested by customer. Customer enrolled in Comfort Care Club maintenance program.
Responded to service call for LP furnace struggling to maintain temperature. Performed comprehensive tune-up on Daikin furnace system, including inspection of ductwork connections, PVC venting, and condensate lines. Verified proper operation of furnace and resolved performance issues as requested by customer. Customer enrolled in Comfort Care Club maintenance program.
Brady E.
Brady E. Checked in
Responded to service call for LP furnace struggling to maintain temperature. Performed comprehensive tune-up on Daikin furnace system, including inspection of ductwork connections, PVC venting, and condensate lines. Verified proper operation of furnace and resolved performance issues as requested by customer. Customer enrolled in Comfort Care Club maintenance program.
Oconomowoc, WI 53066
Completed 10-12 burner cleaning service to remove accumulated debris and performed replacement of failed inducer motor to restore proper system operation. Visual inspection revealed significant soot buildup on heat exchanger and deterioration of burner assembly components.
Completed 10-12 burner cleaning service to remove accumulated debris and performed replacement of failed inducer motor to restore proper system operation. Visual inspection revealed significant soot buildup on heat exchanger and deterioration of burner assembly components.
Brady E.
Brady E. Checked in
Completed 10-12 burner cleaning service to remove accumulated debris and performed replacement of failed inducer motor to restore proper system operation. Visual inspection revealed significant soot buildup on heat exchanger and deterioration of burner assembly components.
Oconomowoc, WI 53066
Oconomowoc, WI - Performed scheduled annual maintenance on furnace under CCC Quality Plan agreement. System is operating normally with no issues identified. Noted Honeywell UV light system in good condition (last changed January 2025) and customer maintains their own filters.
Paul M.
Paul M. Checked in
Performed scheduled annual maintenance on furnace under CCC Quality Plan agreement. System is operating normally with no issues identified. Noted Honeywell UV light system in good condition (last changed January 2025) and customer maintains their own filters.
Oconomowoc, WI 53066
Performed scheduled maintenance on a 2006 furnace under CCC Premium Plan. Completed regular cleaning and 16X25X4 filter service. Noted significant rust on burners and heat exchanger components that warrant attention. Discussed condition with owner regarding potential future maintenance needs.
Performed scheduled maintenance on a 2006 furnace under CCC Premium Plan. Completed regular cleaning and 16X25X4 filter service. Noted significant rust on burners and heat exchanger components that warrant attention. Discussed condition with owner regarding potential future maintenance needs.
Paul M.
Paul M. Checked in
Performed scheduled maintenance on a 2006 furnace under CCC Premium Plan. Completed regular cleaning and 16X25X4 filter service. Noted significant rust on burners and heat exchanger components that warrant attention. Discussed condition with owner regarding potential future maintenance needs.
Oconomowoc, WI 53066
Oconomowoc, WI - Responded to emergency service call for Kohler residential standby generator displaying "shut down AC sensing lost" fault code. Diagnosed issue as AC sense loss fault likely caused by cold weather conditions. Reset fault code and verified generator operation. Recommended installation of cold weather kit to prevent similar failures during future low temperature events.
Lucas H.
Lucas H. Checked in
Responded to emergency service call for Kohler residential standby generator displaying "shut down AC sensing lost" fault code. Diagnosed issue as AC sense loss fault likely caused by cold weather conditions. Reset fault code and verified generator operation. Recommended installation of cold weather kit to prevent similar failures during future low temperature events.
Oconomowoc, WI 53066
Performed annual furnace maintenance including installation of new 16x25x1 filter and replacement of door safety switch. Inspected Daikin furnace system with Aprilaire humidifier and verified proper operation of all components. System is now operating correctly with all safety features functional.
Performed annual furnace maintenance including installation of new 16x25x1 filter and replacement of door safety switch. Inspected Daikin furnace system with Aprilaire humidifier and verified proper operation of all components. System is now operating correctly with all safety features functional.
Brady E.
Brady E. Checked in
Performed annual furnace maintenance including installation of new 16x25x1 filter and replacement of door safety switch. Inspected Daikin furnace system with Aprilaire humidifier and verified proper operation of all components. System is now operating correctly with all safety features functional.
Oconomowoc, WI 53066
Oconomowoc, WI - Performed tune-up service on two furnace units (one standard furnace and one MagicPak unit). Completed regular cleaning and inspection of both systems, which appear to be in good working condition. Customer enrolled in monthly maintenance plan with 16x25x1 filters.
Paul M.
Paul M. Checked in
Performed tune-up service on two furnace units (one standard furnace and one MagicPak unit). Completed regular cleaning and inspection of both systems, which appear to be in good working condition. Customer enrolled in monthly maintenance plan with 16x25x1 filters.
Oconomowoc, WI 53066
Successfully installed a secondary sump pump system in customer's basement, adding a Jim Murray EC-MAN submersible pump with remote float switch. Ran a dedicated 15-amp circuit from the generator panel to power the new pump installation. Mounted two quiet check valves to complete the water management system, ensuring proper drainage and backup protection.
Successfully installed a secondary sump pump system in customer's basement, adding a Jim Murray EC-MAN submersible pump with remote float switch. Ran a dedicated 15-amp circuit from the generator panel to power the new pump installation. Mounted two quiet check valves to complete the water management system, ensuring proper drainage and backup protection.
Lucas H.
Lucas H. Checked in
Successfully installed a secondary sump pump system in customer's basement, adding a Jim Murray EC-MAN submersible pump with remote float switch. Ran a dedicated 15-amp circuit from the generator panel to power the new pump installation. Mounted two quiet check valves to complete the water management system, ensuring proper drainage and backup protection.
Oconomowoc, WI 53066
Performed routine furnace tune-up service and addressed reported whistling noise. Discovered significantly dirty filter causing restricted airflow. Replaced filter which eliminated noise and restored proper system operation.
Performed routine furnace tune-up service and addressed reported whistling noise. Discovered significantly dirty filter causing restricted airflow. Replaced filter which eliminated noise and restored proper system operation.
Brady E.
Brady E. Checked in
Performed routine furnace tune-up service and addressed reported whistling noise. Discovered significantly dirty filter causing restricted airflow. Replaced filter which eliminated noise and restored proper system operation.
Oconomowoc, WI 53066
Oconomowoc, WI - Diagnosed recurring error code due to pressure switch tripping. Discovered water accumulation in flue pipe causing condensation issues. Corrected the problem by re-pitching flue pipe to ensure proper condensate drainage and prevent future pressure switch faults.
David H.
David H. Checked in
Diagnosed recurring error code due to pressure switch tripping. Discovered water accumulation in flue pipe causing condensation issues. Corrected the problem by re-pitching flue pipe to ensure proper condensate drainage and prevent future pressure switch faults.
Oconomowoc, WI 53066
Performed complete annual furnace tune-up on 2006 model, including inspection of heat exchanger, flame sensor, igniter, inducer motor, blower motor, burners, venting, safety limits, and gas operation. Cleaned blower compartment, drain trap, and replaced all drain hoses. System testing confirmed proper operation with readings: inducer amp 0.49, gas pressure 1.7/3.4, blower amps 6.96, HSI ohms 64.7, return temp 73°F, supply temp 121°F, heat rise 48°F, and CO level 19.
Performed complete annual furnace tune-up on 2006 model, including inspection of heat exchanger, flame sensor, igniter, inducer motor, blower motor, burners, venting, safety limits, and gas operation. Cleaned blower compartment, drain trap, and replaced all drain hoses. System testing confirmed proper operation with readings: inducer amp 0.49, gas pressure 1.7/3.4, blower amps 6.96, HSI ohms 64.7, return temp 73°F, supply temp 121°F, heat rise 48°F, and CO level 19.
Lucas M.
Lucas M. Checked in
Performed complete annual furnace tune-up on 2006 model, including inspection of heat exchanger, flame sensor, igniter, inducer motor, blower motor, burners, venting, safety limits, and gas operation. Cleaned blower compartment, drain trap, and replaced all drain hoses. System testing confirmed proper operation with readings: inducer amp 0.49, gas pressure 1.7/3.4, blower amps 6.96, HSI ohms 64.7, return temp 73°F, supply temp 121°F, heat rise 48°F, and CO level 19.
Oconomowoc, WI 53066
Completed furnace tune-up with filter replacement and comprehensive humidifier service, which included cleaning the severely scaled evaporative pad and rewiring the unit to restore functionality. Identified deteriorated burner assembly requiring replacement and addressed loud operating noise. Recommended replacement of burners to prevent future system inefficiency and potential failure.
Completed furnace tune-up with filter replacement and comprehensive humidifier service, which included cleaning the severely scaled evaporative pad and rewiring the unit to restore functionality. Identified deteriorated burner assembly requiring replacement and addressed loud operating noise. Recommended replacement of burners to prevent future system inefficiency and potential failure.
Brady E.
Brady E. Checked in
Completed furnace tune-up with filter replacement and comprehensive humidifier service, which included cleaning the severely scaled evaporative pad and rewiring the unit to restore functionality. Identified deteriorated burner assembly requiring replacement and addressed loud operating noise. Recommended replacement of burners to prevent future system inefficiency and potential failure.
Oconomowoc, WI 53066
Performed annual maintenance on dual Carrier furnace system according to CCC Quality Plan Agreement. Conducted comprehensive tune-ups on both units, replaced two 16x25x4 air filters, and completed cleaning and operational check of the humidifier system. All equipment functioning properly with no issues identified.
Performed annual maintenance on dual Carrier furnace system according to CCC Quality Plan Agreement. Conducted comprehensive tune-ups on both units, replaced two 16x25x4 air filters, and completed cleaning and operational check of the humidifier system. All equipment functioning properly with no issues identified.
Brady E.
Brady E. Checked in
Performed annual maintenance on dual Carrier furnace system according to CCC Quality Plan Agreement. Conducted comprehensive tune-ups on both units, replaced two 16x25x4 air filters, and completed cleaning and operational check of the humidifier system. All equipment functioning properly with no issues identified.
Oconomowoc, WI 53066
Responded to no heat call at customer residence with Goodman furnace system (10+ years old). Diagnostic testing revealed faulty pressure switch preventing ignition sequence. Replaced defective pressure switch, restoring proper system operation and heat function.
Responded to no heat call at customer residence with Goodman furnace system (10+ years old). Diagnostic testing revealed faulty pressure switch preventing ignition sequence. Replaced defective pressure switch, restoring proper system operation and heat function.
Jacob K.
Jacob K. Checked in
Responded to no heat call at customer residence with Goodman furnace system (10+ years old). Diagnostic testing revealed faulty pressure switch preventing ignition sequence. Replaced defective pressure switch, restoring proper system operation and heat function.
Oconomowoc, WI 53066
Returned to site and successfully installed zone dampers and control panel per work order instructions. Inspected existing ductwork configuration and integrated new zoning system components. Observed water damage near plumbing penetrations that customer should monitor, but not directly related to the HVAC zoning installation work completed today.
Returned to site and successfully installed zone dampers and control panel per work order instructions. Inspected existing ductwork configuration and integrated new zoning system components. Observed water damage near plumbing penetrations that customer should monitor, but not directly related to the HVAC zoning installation work completed today.
Alex M.
Alex M. Checked in
Returned to site and successfully installed zone dampers and control panel per work order instructions. Inspected existing ductwork configuration and integrated new zoning system components. Observed water damage near plumbing penetrations that customer should monitor, but not directly related to the HVAC zoning installation work completed today.
Oconomowoc, WI 53066

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

Heating Repair in Oconomowoc, WI | AC Repair

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Words From Around Town
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
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
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 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