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
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.
Performed routine HVAC tune-up service, including visual inspection of ductwork system. Documented moderate dust accumulation in ventilation shafts with some visible seam integrity concerns. Interior duct examination revealed minor sooting and potential particulate buildup requiring future attention, particularly near junction points.
Responded to no heat complaint for residential hydronic heating system. Diagnosed faulty expansion tank and failing valve assembly. Replaced green expansion tank and red valve assembly, bled air from system, and verified proper heat circulation and pressure to restore full functionality.
Performed comprehensive preventive maintenance on residential heating system. Inspected furnace/boiler unit, associated piping, and safety equipment including fire extinguisher. System appears to be in functional condition with no visible signs of damage or leakage.
Completed assessment and photo documentation of residential HVAC system replacement needs, focusing on the existing furnace unit with exposed control board and motor assembly. Inspected current installation configuration including PVC venting, refrigerant lines, and integration with existing ductwork in the utility closet, noting the condition of surrounding plumbing infrastructure.
Performed comprehensive tune-up inspection on HVAC system. Identified mold growth in condensate drain line and significant deterioration of duct insulation. Cleaned drain line, applied antimicrobial treatment, and documented insulation condition for future replacement recommendation.
Successfully installed new baseboard heating units in the residence. Units were properly mounted along walls beneath windows with connection to existing copper piping system. Installation included connecting all necessary valves and pressure components, ensuring proper operation of the complete heating system.
Completed warranty inspection of recently installed HVAC system. Verified proper installation of ceiling vents with appropriate air distribution in main living area. Confirmed correct placement and functionality of wall-mounted return air register in compliance with manufacturer specifications.
Performed scheduled HVAC tune-up on Carrier furnace system. Inspected all components and verified proper system operation, with supply air temperature measuring 129°F, which is within optimal range. No deficiencies were identified during the maintenance service.
Completed installation of new HVAC system in client's utility space, including proper mounting of ductwork and installation of PVC condensate drainage pipes with appropriate elbow joints and wall brackets. Addressed existing condensation issues on metal panels by installing proper insulation and implementing moisture mitigation measures to prevent future condensation problems.
Conducted comprehensive assessment of existing HVAC system in residential utility room, identifying aging Carrier furnace unit requiring replacement. Documented current installation featuring metal ductwork, connected humidifier, and proximity to water heater for proper replacement planning. Prepared estimate for complete system replacement with appropriately sized equipment to integrate with existing ductwork configuration.
Assessed and corrected significant corrosion on copper drain pipe servicing utility sink in basement, which had caused water damage and potential mold development on surrounding wall areas. Additionally, inspected and serviced three mint green water circulation pumps on the hydronic heating system, confirming proper operation of the labeled zones including "Family Room" circuit.
Inspected HVAC system control board showing fault code "dP" on digital display. Documented condition with photographs of circuit board, noting multiple connection points with red, white, yellow, and black wires. Electronic components appeared to be functioning properly after diagnostic analysis.
Completed installation of new furnace in basement utility area, including connection of black ventilation pipes and proper integration with existing water heater system. Performed electrical connection work in attic/crawlspace, ensuring proper wiring to junction components and verifying compatibility with the home's ductwork system.
Completed HVAC maintenance service on Daikin furnace system. Performed comprehensive inspection, replaced air filter with new pleated filter, and confirmed system is operating within manufacturer specifications. Unit is in good overall condition with no immediate concerns noted.
Performed routine maintenance tune-up on HVAC system, including inspection of ductwork. Interior duct examination revealed significant buildup of dust and potential soot accumulation on surfaces. Photos documented the condition of ductwork showing textured, discolored interior surfaces with possible mineral deposits and corrosion that may affect system efficiency.
Performed annual tune-up on One Hour furnace system. Inspection revealed significant frost accumulation and corrosion on interior ductwork, plus oxidation on metal components indicating moisture issues. Cleaned affected areas, removed frost buildup, and applied rust inhibitor to corroded sections to prevent further deterioration. Recommend monitoring system for continued moisture problems and scheduling follow-up inspection in 6 months.
Completed attic ductwork renovation, including installation of new flexible ducts, insulation of ductwork and ceiling space with reflective foil-faced material, and structural framing adjustments to improve system efficiency. Work involved accessing confined attic space, routing ducts through existing frame structure, and ensuring proper airflow configuration.
Conducted estimate for complete HVAC system replacement. Existing outdoor unit was observed covered with protective tarp on concrete pad with visible connection lines. Inspected electrical panel to evaluate service capacity for potential new equipment installation.
Performed routine preventative maintenance on Daikin furnace system. Inspected interior ductwork revealing minor dust accumulation and some yellowish-brown residue buildup on interior surfaces. Cleaned accessible components and verified proper operation of intake and exhaust PVC ventilation pipes.
