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 full HVAC system installation including new furnace and air conditioning condenser unit positioned on concrete pad with proper refrigerant line connections and electrical hookup. Installed new registers throughout the home, ran fresh ductwork for bathroom exhaust fan ventilation, and completed condensate drain system with PVC piping and exterior discharge line mounted to building exterior.
Completed diagnostic evaluation and upgraded existing single-handle faucet system to double-handle configuration. Installed additional hot water spigot to accommodate tankless water heater integration. Verified proper water flow and temperature control through both hot and cold water lines, ensuring leak-free connections and optimal functionality of the upgraded faucet assembly.
Performed preventive maintenance tune-up on residential air conditioning system. Conducted electrical diagnostics using digital multimeter to verify proper amperage draw and system performance. Unit operating within normal parameters with no deficiencies noted.
Performed comprehensive air conditioning tune-up on residential HVAC system, including outdoor condensing unit and indoor air handler. Conducted refrigerant pressure testing using manifold gauges to verify proper system charge and operating pressures, inspected all refrigerant lines and connections, and documented equipment model information for service records.
Completed estimate for full HVAC system replacement at residential property. Evaluated existing Zieco furnace located in basement utility room and outdoor AC condenser unit with grid-pattern fan grille; outdoor unit showing signs of neglect with vegetation growth around base and confirmed non-operational status. Provided replacement recommendations for both heating and cooling equipment to restore complete climate control functionality.
Completed comprehensive AC tune-up on outdoor condensing unit, performing standard maintenance procedures including electrical testing with digital multimeter to verify proper amperage and voltage readings. Unit operating within normal parameters; condenser positioned on proper pad with adequate clearance and gravel base for drainage.
Completed laundry relocation installation with new water supply lines and drain piping. Installed hot and cold water valve assemblies with brass fittings and control handles mounted on wall bracket within framed cavity, routed PVC supply and drain lines through wall structure with proper support and securing hardware, and positioned all plumbing components to accommodate relocated laundry equipment per specifications.
Responded to service call for sink leaking from strainer assembly after water use, particularly following dishwashing activities. Upon inspection of the under-sink plumbing, diagnosed the issue with the drain strainer connection and associated P-trap assembly. Evaluated the chrome drain tailpiece, slip-joint fittings, and white PVC pipe configuration to identify the source of the leak and completed necessary repairs to restore proper drainage function.
Completed full HVAC system installation including new furnace, air conditioning unit, F100 media cabinet, AprilAire 720 humidifier, and Ecobee 7 thermostat. Adapted all components to existing PVC venting infrastructure, performed vacuum test to verify system integrity with readings reaching -242 microns, and obtained necessary permits prior to installation. All equipment commissioned and operational per manufacturer specifications.
Responded to customer complaint of air conditioning unit making noise. Upon inspection, performed refrigerant pressure diagnostics using manifold gauge set on the basement HVAC system. Verified system pressures and conducted vacuum testing to ensure proper refrigerant charge levels and system integrity, resolving the noise issue related to refrigerant flow irregularities.
Completed full HVAC system installation including new furnace, air conditioning unit, thermostat, AprilAire 700M humidifier, Patriot 80 furnace, and F100 filter cabinet with PVC adaptation for condensate drainage. Brazed refrigerant lines and installed exterior condensate drain piping with proper mounting and secure connections to building exterior. All work performed in coordination with licensed electrician and proper permits obtained per code requirements.
Completed installation of new Lennox EL16KF air conditioning system with matching evaporator coil and 35-foot refrigerant line set at residential property. Unit installed on exterior foundation pad against building with yellow vinyl siding, all refrigerant lines properly insulated and secured, system charged with R-454B refrigerant per manufacturer specifications, and all electrical connections completed to code. Installation tested and verified operational with proper airflow and cooling performance.
Responded to service call for pilot light that would not remain lit on tanked water heater. Performed diagnostic inspection of gas control valve, thermocouple, and pilot assembly. Identified faulty thermocouple preventing proper flame sensing, causing safety shutoff of pilot light. Recommended thermocouple replacement to restore proper water heater operation.
Performed comprehensive AC tune-up on residential cooling system. Inspected condenser coil assembly and protective grille, confirming clean condition with no debris accumulation or fin damage. Tested electrical components including capacitor and contactor using digital multimeter to verify proper operation and system functionality.
Responded to service call for odor coming from furnace. Upon arrival, performed comprehensive diagnostic evaluation and system tune-up as requested. Conducted electrical testing on outdoor unit using digital multimeter, measuring voltage and amperage at the contactor assembly to verify proper operation. All electrical connections showed normal readings with voltage at 75.7V on tested circuit. Inspected and tested all wire terminations including multi-phase connections to ensure secure contact points. Proceeded with refrigerant system evaluation using manifold gauge set to measure operating pressures on both high and low sides of the system. Connected gauges to service ports and monitored system performance. All pressure readings fell within manufacturer specifications for current ambient conditions. Verified proper refrigerant charge and system operation through pressure analysis. Completed visual inspection of outdoor condensing unit including condenser coil condition, electrical co
Responded to no cooling complaint on residential air conditioning system under warranty. Upon arrival, connected manifold gauge set to outdoor condensing unit to diagnose system performance. Inspected evaporator coil fins and condenser coil assembly, noting minor dust accumulation on heat exchanger surfaces. Measured refrigerant pressures and verified system operation, restored cooling functionality to unit.
Completed routine cooling system maintenance and inspection as part of prepaid membership service. Performed comprehensive AC tuneup including temperature differential measurements showing 57.8°F readings, inspected TITAN PRO dual capacitor (TRCFD355, 35+5 MFD, 440/370VAC) which displayed surface discoloration but remained operational within specifications, and verified proper operation of outdoor condensing unit with all electrical connections secure and refrigerant lines properly attached.
Completed comprehensive air conditioning tune-up including inspection of electrical components, contactor, and wiring connections within the unit's electrical compartment. Verified system pressures using manifold gauges and inspected condenser coil fins and exterior housing for proper operation. All components found to be functioning within normal parameters.
Completed comprehensive estimate for replacement of 30-year-old original HVAC system including natural gas furnace and air conditioning unit. Existing Trane XE 80 furnace located in basement showing age-related wear and operating at end of service life. Documented current equipment condition through detailed photography, noting system configuration, ductwork connections, and installation environment including concrete foundation with visible efflorescence indicating moisture concerns that should be addressed during replacement installation.
# HVAC System Installation Completed full installation of new furnace and air conditioning system with associated ductwork modifications. System was properly commissioned and tested using calibrated diagnostic equipment to verify refrigerant pressures, temperatures, and system performance. All readings confirmed optimal operation with proper superheat and subcooling values within manufacturer specifications. Unit is operating efficiently and ready for service.
