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.
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
Performed comprehensive HVAC tune-up with temperature diagnostics, recording supply air temperature of 112.1°F using Fieldpiece digital thermometer. System exhibited normal operation with adequate airflow through vents. Inspected ductwork and housing in utility space, noting some dust accumulation consistent with regular usage, but no significant issues requiring immediate attention.
Responded to no-heat call for aging furnace (10+ years). Upon inspection, found faulty blower motor and worn electrical connections. Removed access panel, replaced blower motor assembly, cleaned interior components, and reconnected wiring harnesses. System now functioning properly with restored heat output.
Performed diagnostic inspection of gas furnace with focus on the gas valve assembly and burner components. Inspected wiring connections to control module, verified proper operation of hi/lo gas settings, and confirmed flame sensor functionality. Unit is operating within normal parameters with no issues detected in the combustion process.
Performed comprehensive tune-up on Honeywell HVAC system. Inspected gas valve assembly, electrical connections, and blower motor functionality. All components verified to be in proper working order with no signs of damage or unusual wear.
Completed installation of a new tankless water heater unit in utility area. Mounted unit on plywood backing board against wooden framed wall using proper metal brackets. Connected copper supply lines with appropriate shut-off valves and installed necessary electrical connections to exterior meter box. All systems tested and functioning properly.
Completed installation of a new furnace system with a Honeywell Home ProSeries digital thermostat. System was properly calibrated and tested, with the thermostat successfully programmed and functioning at the set temperature of 55 degrees. Verified proper system pressure using Magnehelic gauge, confirming readings within manufacturer specifications.
Performed diagnostic inspection of gas furnace system. Accessed and examined interior components including control board, gas valve assembly, and electrical connections. Unit showed normal dust accumulation but all components were in working condition with no visible damage. System was tested and confirmed to be operating within specifications.
Performed diagnostic inspection on residential furnace in response to no-heat complaint. Accessed internal components by removing front panel, inspected control board, wiring connections, and primary mechanical systems. Identified and resolved issue with furnace operation, restoring normal heating function. Unit now operating within manufacturer specifications.
Performed routine tune-up on Amana HVAC system. Conducted visual inspection of equipment, checked system specifications against manufacturer label, and examined copper line connections. System is functioning within normal parameters with expected wear consistent with age of installation.
Performed scheduled maintenance on residential HVAC system. Inspected furnace unit with visible service tag and measured supply air temperature (106.5°F) using PDT650 thermometer. System operating within normal parameters with no issues detected.
Responded to a no-heat call for an aging HVAC system (10+ years). Upon inspection, accessed the furnace control panel to diagnose electrical components and wiring connections. Performed comprehensive system evaluation, focusing on critical components visible in the utility area installation with connected PVC ventilation piping and ductwork.
Conducted inspection of customer's water heater system and associated plumbing infrastructure. Examined copper piping connections, vent pipe installation, and operational status of control valves. Noted minor evidence of previous water leakage near valve connections, but confirmed system is currently functioning properly with no active leaks or safety concerns.
Performed routine maintenance on Carrier HVAC system, including inspection of ductwork which showed moderate dust accumulation and minor discoloration at junction points. Examined main furnace unit, checked PVC exhaust/intake pipes for proper ventilation, and verified operation of digital monitoring device. All components functioning within normal parameters.
Completed inspection of existing HVAC system and water heater installation in utility room. Observed Richmond water heater with proper PVC venting (SCH 40 series) and evaluated current furnace system with access panel open for component assessment. Documentation photos taken of plumbing connections and mechanical equipment for replacement estimate preparation.
Performed routine maintenance inspection on antique cast iron radiator system. Identified significant corrosion and mineral buildup on water valve/shut-off fixture, with visible copper oxidation and evidence of previous water leakage. Recommended replacement of deteriorated valve assembly to prevent potential failure and water damage.
Completed inspection and repair of gas furnace exhibiting ignition issues. Removed front panel to access internal components, examined control board and gas valve functionality, and performed a thorough cleaning of the flame sensor. System was fully tested after repair, confirming proper ignition sequence and normal operation.
Performed routine maintenance on gas furnace unit, opening access panels to inspect blower motor assembly and electrical components. Cleaned accumulated dust and debris from interior components including control board and gas valve assembly. Checked all wiring connections (red, yellow, green, white, blue) to ensure proper functionality and secure attachment.
Responded to an HVAC install callback to diagnose system electrical issues. Used Fluke multimeter to verify voltage readings at 709V and inspected the ECM Drive-24VAC circuit board, where multiple wire connections were examined. Checked and reseated all terminal connections on the control board to restore proper system operation.
Conducted site assessment of water heater installation in utility room. Inspected existing plumbing infrastructure, including PVC/copper pipe runs along ceiling and wall framing. Evaluated water tank condition, connecting fixtures, and supporting brackets. All systems appear properly installed with appropriate insulation and safety labeling in place.
Conducted routine maintenance tune-up on residential gas furnace. Performed diagnostic testing using electronic analyzer to verify proper system operation and safety parameters. Inspected heat exchanger, electrical connections, and condensate drainage system, ensuring all components were functioning within manufacturer specifications.
