For over 90 years, the team at Thielmann has provided customers in Waukesha, Wisconsin with reliable, top-notch HVAC repair services. From heating and cooling to air quality and installation, we do it all so you can rest assured your home will be in its best condition and your family will be comfortable.
We also know life gets busy—that’s why we offer easy, convenient scheduling. Give our technicians a call at (262) 299-6197 or fill out our online form and someone will get back to you quickly.
Our Professionals Will Keep Your House Comfortable During the Fall, Winter, Spring, and Summer Seasons
The average temperatures in Waukesha, Wisconsin are radically different from winter to summer. Winters are known for being freezing, with some of the coldest months having temperatures in the low 20s. In contrast, the summers are humid, warm, and muggy.
Summer temperatures in Waukesha hit around 75°F but can get up to 90°F. The humidity from the surrounding lakes and rivers makes it feel hotter in the local area. Stay cool in this summer heat, and cozy and warm in the winter, when you work with our team of NATE-certified technicians. We will keep your house habitable throughout each season by helping you maintain your furnace, heat pump, boiler, or central air conditioner.
Air Conditioner Replacement and Installation Services
Sometimes, your air conditioner is on its last leg and the best move is not to repair it but to replace it completely. If this is the case our team of certified technicians is ready to help. With decades of experience in AC installation and replacement, we can handle putting in a new AC unit for you from start to finish.
We also provide heating and cooling services in Waukesha, Wisconsin for the best brands on the market and have flexible, easy financing options so you can stay within your budget.
Air Conditioning Repair Services
Summers in Wisconsin can get muggy and hot. Make sure your home is up for the task of keeping you cool by scheduling air conditioning repair or air conditioning tune-up services.
The best way to ensure your system is ready for summer is by having a technician come over and assess the condition of your air conditioner to confirm if it requires repairs.
Here are some of the components of an AC system we will check to see if it needs repair:
- Evaporator coil
- Compressor
- Condenser coil
- Expansion valve
- Filter
- Fan
We also offer air conditioner installation services for old systems that cannot be fixed. If you notice any weird noises, strange smells, or a lack of cold air, chances are you will need a repair or replacement.
Ductless Mini-Split Services
Homeowners in Wisconsin love ductless mini-splits because they are great for the ever-changing weather, from the frigid winters to the humid, muggy summers. Ductless mini-splits are super versatile and offer both heating and cooling options.
We offer the following mini-split services:
- Installation
- Replacement
- Repair
- Maintenance
- Inspections
Our team offers superior HVAC repair services and is fully equipped to handle any ductless mini-split issues, like refrigerant leaks, compressor problems, drainage malfunctions, frozen coils, electrical problems, blower issues, weird noises, and more.
Furnace Repair and Tune-Up Services
Keep your home warm and cozy for the winter with our reliable furnace repair and tune-up services for local residents in Waukesha, Wisconsin.
We can work on any system you have, like:
- Gas furnaces
- Oil furnaces
- Heat pumps
- Packaged units
- Boilers
Furnace Installation and Replacement Services
We can install gas, oil, or electric systems for your convenience. Whether your old system is on the fritz and you need a furnace replacement, or you have a brand-new property and need a furnace installed, we will take care of it.
Heat Pump System Installation Services
Wisconsin residents also use heat pumps to stay warm in the cold winters. Our NATE-certified technicians specialize providing extensive heating and cooling services in Waukesha and will keep you updated from start to finish on the project.
To receive support with a heat pump installation or heat pump repair, contact or HVAC contractors to receive support. Our technicians have the training necessary to fix your broken heat pump system.
Boiler Installation and Repair Services
Another popular heating system, boilers are a great energy-efficient way to heat your home. We offer HVAC installation, repair, maintenance, and tune-ups on boilers.
If you notice any of the following signs, contact us for boiler repair:
- Insufficient heat
- Foul odors
- Strange noises
- Cold air
- Yellow pilot light
We also offer routine boiler maintenance to expand the longevity of your system and ensure it is fully functional when you need it.
Thermostat Installation, Replacement, and Repair Services
Your thermostat is the remote control for your climate comfort. It controls heating and cooling functions but is often one of the most overlooked components of your HVAC system.
If you begin noticing malfunctions in your HVAC system, before rushing to assumptions that a motor is broken or you need a full replacement, consider your thermostat. We offer thermostat installation, replacement, and repair services.
Commercial Heating Maintenance and Replacement Services
Just like homes, businesses and commercial spaces need to offer a good climate-controlled environment to keep patrons and employees alike comfortable.
If you notice anything off about your business’s HVAC system, call the professionals at Theilmann to receive fast and convenient commercial heating repairs and services. Our 90 years of expertise means we’ve seen it all, not just in residential spaces but in commercial ones as well.
Professional Plumbing Services in Waukesha WI
Thielmann Heating, Cooling, and Plumbing has been serving Waukesha homeowners for over 90 years. Our licensed plumbers handle every type of plumbing issue with precision and care. From minor leaks to full system replacements, we provide clear solutions that keep your home running smoothly.
A plumbing issue can quickly disrupt your day. That’s why we respond quickly and get the job done right the first time. Our technicians inspect your system, identify the problem, and provide straightforward options that fit your needs and budget. We use trusted materials and proven methods to ensure repairs last.
We offer a full range of plumbing services in Waukesha:
- Drain & Sewer Cleaning: Clear out blockages and buildup to restore smooth water flow and prevent future clogs.
- Fixture Repair & Installation: Replace or repair faucets, toilets, and sinks for improved performance and reduced water waste.
- Water Heater Repair & Replacement: Maintain, repair, or upgrade tank and tankless models for steady hot water and better efficiency.
- Water Treatment & Filtration: Remove hard minerals and impurities for cleaner, healthier water throughout your home.
- Water Line Repair & Replacement: Fix damaged pipes or install new water lines to maintain consistent pressure and prevent leaks.
- Sump Pump Repair & Installation: Keep your basement safe from flooding with expert sump pump maintenance and installation.
Homeowners throughout Waukesha trust Thielmann Heating, Cooling, and Plumbing for honest work and dependable service. We take pride in our craftsmanship and commitment to customer satisfaction. When you need professional plumbing you can trust, call Thielmann today and let our experts take care of your home.
Take Back Your Weekends and Worry Less About Cooling and Heating Repairs in Your House
One of the advantages of working with our team of professionals includes having more time to enjoy your free time in Waukesha. While we take care of solving your HVAC problems, you can spend your time out on the town.
Take a stroll around Sanctuary Woods or visit the Waukesha County Historical Society and Museum. Our technicians will quickly inspect and fix your malfunctioning furnace or air conditioner to ensure you have time to enjoy your weekend.
Book a Heating or Cooling Appointment With Our Team in Waukesha
Our team in Waukesha is available any day for heating and cooling services. From boiler repair and heat pump installation to AC maintenance plans and heaters repairs, we have you covered. We also are skilled in air quality and offer duct cleaning, whole-home humidifiers, and other air purification services.
Simply fill out our form online or give us a call at (262) 299-6197 to receive assistance.
Recent Jobs and Reviews in Waukesha, WI
Job Locations and Reviews
Completed sump pump system inspection and service in basement utility area. Verified proper operation of pump, discharge piping, and electrical connections; confirmed basin is free of debris and functioning correctly. All components including PVC discharge pipe, pump lid with safety label, and associated electrical wiring are in working order with no immediate repairs required.
Completed installation and system start-up of new Lennox air conditioning condenser unit. Unit was positioned on composite pad with proper gravel base, all refrigerant lines connected and tested, electrical connections verified, and system successfully started with normal operating parameters confirmed. Condenser is operating efficiently with no leaks detected and proper airflow through louver vents.
Completed system start-up and commissioning of newly installed HVAC equipment. Utilized Yellow Jacket manifold gauge set to verify refrigerant pressures and system charge, confirming proper operating parameters on both high and low sides. Performed electrical diagnostics with digital multimeter to ensure correct voltage and amperage readings throughout the system, verifying all components are functioning within manufacturer specifications.
Completed system start-up and commissioning of newly installed HVAC equipment. Performed refrigerant charge verification using manifold gauges and confirmed system amperage draw at 63.1 amps with calibrated Fluke multimeter, ensuring all electrical and mechanical parameters meet manufacturer specifications for optimal operation.
Performed diagnostic testing on baseboard heating system using electronic monitoring equipment and sensors. Inspected unit operation, verified electrical connections, and documented system conditions with thermal imaging and diagnostic tools to assess heating performance and identify any operational concerns.
Completed installation of new air conditioning system and evaporator coil. Performed comprehensive system diagnostics using Fieldpiece meters to verify proper refrigerant pressures, temperatures, and airflow across both indoor and outdoor units. All measurements confirmed system is operating within manufacturer specifications and providing optimal cooling performance.
Completed comprehensive HVAC system replacement estimate for residential property, evaluating existing outdoor condensing unit and indoor air handler system. Assessment included inspection of current equipment placement, ductwork configuration, and mechanical room conditions to provide recommendations for complete system upgrade with proper sizing and installation requirements for both exterior and basement components.
Completed installation of new HVAC system including air conditioning unit and evaporator coil in residential utility closet. System was installed with proper refrigerant line connections, condensate drainage, electrical hookups, and integrated with existing Thielmann furnace, ensuring all components are properly secured and operational per manufacturer specifications.
Conducted comprehensive indoor air quality assessment in basement utility area housing water heater, HVAC ductwork, and air handling equipment. Evaluated existing ventilation system configuration, inspected metal ductwork for proper airflow distribution, and assessed dehumidification equipment placement to provide estimate for IAQ system improvements and optimization of basement environmental conditions.
Completed HVAC system installation in residential utility closet featuring Carrier furnace with matching air handler unit. Installation included proper venting configuration with white PVC piping for combustion air and condensate drainage, copper refrigerant line sets with insulation, and electrical connections. All components were mounted and secured within confined mechanical space according to manufacturer specifications and local code requirements.
Completed prepaid HVAC maintenance visit and performed system inspection. Examined condensate drain assembly components including PVC piping, drain line connections, and associated hardware. Verified proper installation and functionality of drain system with elbow joints and vertical piping sections. Inspected HVAC unit housing, ductwork, and mechanical controls including valve mechanisms. System found to be operating within normal parameters with all components properly secured and functioning as designed.
# HVAC Service Report – No Heat Complaint Responded to a no heat call on a residential furnace unit less than 10 years old. Upon arrival, confirmed system was not producing heat. Removed access panel to perform diagnostic inspection of internal components. Visual inspection revealed significant rust corrosion on a copper pipe fitting in the central compartment area, indicating possible condensate drainage issues or moisture infiltration. Examined blower motor assembly, electrical connections, gas valve, and control mechanisms. Verified all electrical connections including multiple wire harnesses throughout the system. Inspected rubber tubing and hose connections for proper routing and integrity. Identified and addressed the root cause of the heating failure. Cleaned corroded components and verified proper system operation. Tested unit through complete heating cycle to ensure restored functionality. System now operating within normal parameters and producing heat as designed.
Completed comprehensive tune-up service on Lennox high-efficiency gas furnace system located in utility room. Performed full system inspection including burner assembly, heat exchanger, blower motor, and all safety controls; verified proper operation of PVC intake and exhaust venting system; tested gas pressure and combustion efficiency within manufacturer specifications; and confirmed all electrical connections, thermostat communication, and condensate drainage functioning correctly.
Completed comprehensive HVAC estimate for complete system replacement at residential property. Evaluated existing outdoor condenser unit showing signs of age and wear, documented current system configuration including electrical connections and service access points, and assessed electrical panel capacity with multiple circuit breakers to ensure adequate power supply for new equipment installation. Provided detailed replacement recommendations based on current system condition and customer requirements.
Completed routine maintenance and inspection of residential gas furnace system in basement mechanical room. Verified proper operation of heating unit, inspected all ductwork connections, examined refrigerant lines and plumbing connections for leaks or damage, and confirmed electrical components and control panel functioning correctly. All equipment found to be in good working condition with proper airflow through white supply ductwork and secure mounting of furnace cabinet.
Completed full HVAC system installation featuring a Lennox cylindrical condenser unit mounted on vibration-dampening pad with proper gravel base for drainage and stability. Installed electrical disconnect box with conduit run to unit, routed and insulated refrigerant lines to indoor air handler, evacuated system using vacuum pump to remove moisture and contaminants, and charged system to manufacturer specifications. Performed diagnostic verification using manifold gauges and digital meter, confirming proper refrigerant pressures, temperatures, and system operation across all parameters.
Completed installation of bathroom door stopper hardware on wall adjacent to bathtub fixture. Mounted brass-finished cylindrical door stopper with secure bracket attachment to ensure proper door clearance and protection of porcelain fixtures.
Completed comprehensive HVAC system estimate for full equipment replacement at residential property. Evaluated existing basement furnace installation with current PVC venting system, humidifier integration, and electrical connections, along with exterior condensing unit positioned on concrete paver pad with proper electrical disconnect and line set connections. Provided detailed replacement recommendations for both indoor and outdoor components to upgrade system efficiency and reliability.
Responded to service call back to inspect condensate pump system in mechanical room. Upon arrival, found motor assembly operating but observed moisture accumulation on concrete floor around unit, indicating potential drainage issue or pump malfunction. Verified electrical connections, inspected discharge tubing, and documented equipment condition for further assessment.
Responded to service call for malfunctioning bathtub diverter and tub spout assembly. Upon inspection, found the diverter handle detached and hanging improperly from mounting position, preventing proper operation of the shower/tub fixture. Removed the existing chrome diverter component and spout assembly from the ceiling-mounted configuration. Secured the diverter mechanism back into proper mounting position, ensuring flush installation against the wall surface. Tested the tub spout and diverter functionality to verify proper water flow direction between tub spout and showerhead. Additionally inspected the bathroom sink faucet and noted mineral deposits on the brushed metal finish but confirmed proper operational function of the wall-mounted single-handle fixture and popup drain assembly.
