
Maintaining functional home and commercial systems and utilities requires consistent attention and investment. Thielmann Heating, Cooling, & Plumbing simplifies home system maintenance by offering comprehensive heating, cooling and plumbing services in Cedarburg. We’re an all-round home comfort service provider completing reliable repairs, maintenance, installations and replacements of utility units.
Our Heating and Air Conditioning Services
If you’re experiencing any heating or air conditioning issues in your home, don’t stress — our certified technicians are ready to help. When you book a service with us, you won’t have to worry about hanging around to ensure everything is going well. We’re highly rated and trusted, which means you can enjoy your time with friends and family while we work on fixing up any HVAC issues you’re encountering.
Repair and Tuneups
If your AC is acting up, but you’re unsure if you need repair, don’t fret — it’s a common predicament. Here are a couple of signs you need AC repair:
- Your AC system is blowing hot air, despite the thermostat setting being correctly.
- There are odd, loud or banging noises from the unit.
- Energy bills spike with no obvious cause.
- Your unit is more than 10 years old.
- Strong, strange odors emit from the AC once it turns on.
- Constant water or refrigerant leaks near the unit.
Our NATE-certified team is ready to restore your AC to good working conditions. Simply give us a call, and we’ll be at your house as promptly as possible. We’ll assess the situation and identify parts needing repair, including the blower, condenser coil, condenser unit, compressor or coolant lines. We offer 24-hour emergency air conditioning repair services, so you never have to be stuck in the humid Wisconsin heat.
Air Conditioner Replacement and Installation Services
If performing continuous HVAC repair services is not enough for your unit, investing in an air conditioning replacement may be your best option. Our certified and licensed technicians will help you find the perfect AC unit for your home. From installation to final inspection, we are committed to your satisfaction and comfort.
Choosing the right replacement can be a little daunting, which is why we assess all aspects of your home. We consider how large your property is, how many people live in the house and the climate. We offer a range of systems, including AC units, ductless mini-splits, heat pumps and packaged units.

Ductless Mini-Split Installation and Repair Services
A ductless mini-split is an excellent option for homeowners looking for versatility in their HVAC system. Mini-splits can offer both heating and cooling depending on the weather. If you need ductless mini-split services in Cedarburg, we have your back. Our team can address all kinds of issues, including:
- Refrigerant leaks
- Compressor issues
- Drainage problems
- Sensor or thermostat malfunctions
- Frozen coils
- Fan or blower issues
- Weird noises or vibrations
Comprehensive Residential and Commercial Heating Solutions
In the cold Wisconsin winters, a reliable, working heating system is essential. If your furnace, boiler or heat pump isn’t properly heating your home or doesn’t even seem to be blowing hot air at all, we can help. Your business’s indoor climate is just as important as your home’s. If your business needs heating solutions, we offer commercial heating maintenance and installation services to keep your business booming and your customers comfortable.
Heat Pump System Installation Services Furnace Cleaning, Installation and Reair services
We’re ready to address any furnace problems you have and can conduct quick furnace repair, maintenance, cleaning and installation services so you can have the heat restored to your home once again. Get same-day service if you notice any of the following signs:
- No heat
- Infrequent cycling
- Leaking unit
- Strange noises
If your furnace needs a replacement or installation, trust us for reliable services. We consider all of your needs to offer you the best solution and can help you select the perfect furnace for your home. Types of furnaces we can help install include:
- Gas furnaces
- Electric furnaces
- Single stage
- 2-stage
- Modulating

Heat Pump System Installation Services
Another heating option for staying warm and cozy during the winter is installing a heat pump. They are just as effective as furnaces and offer more energy efficiency and versatility.
Our technicians provide dependable heat pump installation services for homes in Cedarburg, Wisconsin and will collaborate with you to choose a system with the correct specifications.
Boiler Installation and Repair Services
Keep your home warm with an effective boiler. If you notice any issues with your current boiler, contact us for a repair service. We’re prompt, professional, and thorough with our repair services. If you need an entirely new boiler, no problem—we also do boiler installations.
f you notice that there is insufficient heat, foul odors, cold air, or a yellow pilot light, give us a call. There is a high chance your boiler needs repair.
Thermostat Installation and Repair Services
Thermostats are highly essential in regulating the temperature of your home. If you have a thermostat that isn’t working properly or is on its last legs, you need to replace it or repair it ASAP. Without a functioning thermostat, you won’t get the heating or cooling you need, even if your AC unit or furnace is in good working order.
Cedarburg, WI Plumbing Experts
Thielmann Heating, Cooling, and Plumbing is proud to serve Cedarburg, WI by providing trusted plumbing solutions for homeowners and business owners alike. Regardless of if you’re dealing with a leaking faucet, busted pipe, or need a new water heater installed, our licensed plumbers handle it all with professional plumbing services in Cedarburg, WI. We focus on long-term repairs, no quick fixes, ensuring your plumbing systems keep working all year long.
From small repairs to complete system replacements, Thielmann is the team you can depend on. We have served Wisconsin families for over 95 years, offering reliable service and honest communication on every job. When your home’s plumbing fails, we respond quickly to get your system back in working order. Our experts inspect your plumbing, explain the problem clearly, and recommend the most practical solution for your budget.
Our Cedarburg plumbing services include:
- Water Heater Repair and Installation (Tank and Tankless)
- Drain Cleaning and Clog Removal
- Water Line Repair and Replacement
- Fixture Installation and Upgrades
- Sump Pump Services
- Garbage Disposal Repair and Replacement
- Bathroom and Kitchen Plumbing
- Water Treatment and Filtration Systems
If you start to notice discolored water, slow drains, or rising water bills without an increase in usage, call Thielmann Heating, Cooling, and Plumbing right away. We will provide you with upfront pricing and no-pressure repair recommendations. No matter the extent of the problem, Thielmann’s Cedarburg plumbers can handle anything your home or business throws your way. Call us today (262) 315-3067 at or contact our team online to get your next plumbing service scheduled.
Our Professionals Will Help You Stay Comfortable During the Fall, Winter, Spring, and Summer Seasons
As a place that experiences all four seasons, Cedarburg, Wisconsin is prone to having humid, sunny summers and frigid, bitterly cold winters. Some days are even below freezing, dipping into the 20s.
To avoid an HVAC system outage on a cold winter day, it’s critical to work with our team to perform continuous maintenance. Luckily, our technicians will help you clean and prepare your furnace for the winter season.
On the contrary, summer days in Cedarburg can be as hot as the mid-80s. The local area gets an average of 32 inches of rain per year, including some light snowfall during the winter. In a climate like this, you need to stay equipped with an efficient, working HVAC system.
Make sure to keep Thielmann Heating, Cooling, & Plumbing in mind if you ever need someone to service your heating or cooling system.
Book a Heating, Cooling, or plumbing Appointment With Our Team in Cedarburg, Wisconsin
Serving Waukesha and the surrounding areas, like Cedarburg, our Wisconsin-based team is ready to help you with the services you need. From heating and cooling to plumbing and unique HVAC solutions, we have the expertise and experience to address your challenges and provide high-performing results. Contact us today to schedule your service or get a free estimate!
Read Reviews by Our Customers
EXCELLENT Based on 542 reviews Posted on Stephanie DolnikOctober 10, 2024Trustindex verifies that the original source of the review is Google. Everyone that I have ever came into contact with there has been helpful and wonderful! I would recommend them to anyone!Posted on Aaron WilhelmJuly 19, 2024Trustindex verifies that the original source of the review is Google. Gave me a quote to replace my 29 year old air conditioner.They weren’t the cheapest but were priced with in reason. Installed it quickly and operates wonderfully. I couldn’t be happier.Posted on Lisa FarrellJuly 19, 2024Trustindex verifies that the original source of the review is Google. My husband and I received 5 quotes from 5 different companies before finally deciding upon Thielmann. Although Thielmann was a bit more expensive, the quality we received was outstanding. We went through the Costco Program (Lesa at Menomonee Falls) and received more rebates in doing so. With that program, we received 10% back on our Lennox Air Conditioner and Lennox Furnace. In addition, we received another 2% back by going through Costco and another 2% back by putting it on the Costco Visa card. At any rate, from, Jason, who came to our house to explain what would be done and provide the estimate, to the installers, Ben and Hayden, who provided excellent care installing our new products. They spent the entire day replacing our new HVAC system. The guys were extremely professional and had great precision. Thank you, Thielmann, for a wonderful HVAC system, great customer service, and an amazing job!Posted on Dave SeefeldtJuly 19, 2024Trustindex verifies that the original source of the review is Google. Professional and fast! Installation looks great!Posted on De'Angelo TatumJuly 15, 2024Trustindex verifies that the original source of the review is Google. I liked my experience with them. The guys I spoke with prior to doing the work, the estimation phase , and the ones I spoke with after the work was completed had enough knowledge and suggestion to answer all my questions. I’m pleased with the job they did. I had two AC units installed.Posted on Jay OrcholskiJuly 14, 2024Trustindex verifies that the original source of the review is Google. Wayne helped us find the right equipment. Ben and Hyden were great with the install. Wonderful team, as I would highly recommend The Thielmann Group.Posted on Brad DeFauwJune 26, 2024Trustindex verifies that the original source of the review is Google. I recently had the pleasure of working with The Thielmann Group Heating & Air Conditioning to install a mini-split HVAC system for the second floor of our Cape Cod home in Cedarburg, WI, and I couldn't be more satisfied with the entire experience. Professionalism and Expertise: From the initial consultation to the final installation, the team at The Thielmann Group demonstrated exceptional professionalism and expertise. They took the time to thoroughly assess our home and understand our specific cooling needs. Their knowledgeable staff answered all our questions and provided valuable insights into the benefits of a mini-split system for our unique architectural setup. Quality Installation: The installation process was seamless and efficient. The technicians arrived on time, were courteous, and worked diligently to complete the installation with minimal disruption to our daily routine. They were meticulous in their work, ensuring that everything was installed correctly and neatly. I was particularly impressed with their attention to detail and their commitment to maintaining the aesthetic integrity of our home. Performance: The mini-split HVAC system has exceeded our expectations. The second floor, which used to be uncomfortably warm during the summer months, is now perfectly cool and comfortable. The system operates quietly and efficiently, providing consistent temperature control without any noticeable increase in our energy bills. The Thielmann Group's recommendation and installation of this system have significantly improved our home's overall comfort and livability. Customer Service: The customer service we received was outstanding. The Thielmann Group kept us informed throughout the entire process, from scheduling the installation to following up afterward to ensure everything was working properly. They genuinely cared about our satisfaction and went above and beyond to make sure we were happy with their service. Overall Experience: I highly recommend The Thielmann Group Heating & Air Conditioning to anyone in need of HVAC services. Their professionalism, expertise, and commitment to customer satisfaction are truly commendable. Our experience with them was nothing short of excellent, and we are thrilled with the results of our new mini-split HVAC system. Thank you, Thielmann Group, for your exceptional service and for making our home a more comfortable place to live!Posted on Gail EllenbeckerJune 22, 2024Trustindex verifies that the original source of the review is Google. Quick, through team
Recent Jobs and Reviews in Cedarburg, WI
Cedarburg, WI at a glance
Thielmann Heating, Cooling & Plumbing has completed 20 jobs in Cedarburg, WI between September 2026 and October 2026.
The most recent job was on October 30, 2026.
Thielmann Heating, Cooling & Plumbing has completed 71 jobs in Cedarburg, WI in the last 12 months.
Job Locations and Reviews
Performed a seasonal tune-up on the heating system and verified proper operation. Measured supply air temperature at the register with a calibrated pocket thermometer, recording 108.6°F, which confirms the system is producing adequate heat output. Inspected the programmable thermostat, which was operating in a temporary hold at 65°F with the system calling for heat, and noted heavy dirt and discoloration on the housing.
Diagnosed a water leak at the master bathroom toilet that was migrating through the ceiling below. Inspection revealed deteriorated caulk at the toilet base and water seeping from beneath the bowl, and the toilet was pulled to expose a heavily rusted and corroded closet flange with a compromised seal. Findings were documented for flange repair or replacement and reset of the toilet with a new wax ring and fresh sealant.
Installed a new upright gas furnace on support blocks in the basement mechanical area, connected to the existing sheet metal supply plenum and return air ductwork. Routed PVC combustion air/exhaust piping up through the ceiling and installed a condensate drain fitting, with all work permitted and the electrical connections completed by a licensed electrician. Equipment is secured and in good condition, with no visible damage or corrosion at completion.
Installed a new Lennox upflow gas furnace with PVC combustion air intake and exhaust venting, connected to the existing galvanized supply plenum and return ductwork. Connected the gas supply with a shutoff valve, wired the electrical disconnect, installed a condensate pump with drain tubing, and set up the Honeywell air cleaner at the return side. Completed the installation and left the unit ready for operation.
Diagnosed a leaking outdoor hose bib and inspected the supply line and interior shutoff (gate valve) in the joist bay below. Found displaced insulation around the valve and moisture staining on the surrounding framing and subfloor, indicating prior water exposure at the hose bib supply. Isolated the affected line and documented conditions for repair recommendations.
Performed scheduled seasonal cooling maintenance under the recurring membership agreement, including a borescope inspection of internal system components. Imaging revealed heavy mineral scale and powdery residue buildup on interior surfaces, along with a corroded, charred-appearing edge at a circular opening and a ribbed coil/fin element in the channel, indicating deterioration. Findings were documented with photos, and further evaluation or corrective service is recommended.
Evaluated the gas line serving the exterior fireplace for repair and documented the surrounding conditions. The inspection area showed heavily corroded, rusted metal components buried in leaf litter and debris near the base of a curved masonry wall, along with moss-filled paver joints and weathered hardscape surfaces. Estimate prepared for repair of the gas piping to restore safe, code-compliant supply to the fireplace.
Performed an on-site evaluation for a furnace replacement, inspecting the existing galvanized upflow furnace with mounted humidifier, supply and return ductwork, adjacent gas water heater and flue, and electrical disconnect and panel serving the equipment. Documented unit placement, venting, and ductwork connections, and noted moisture staining at the equipment base, to determine replacement scope and installation requirements.
Performed a second-opinion inspection on a Carrier 926TA48080V17 gas furnace (10+ years old) after the customer was previously told the heat exchanger was failed. Used a borescope to inspect the heat exchanger cells and found no visible cracks, holes, or breaches, though the evaporator coil drain pan showed minor rust staining and debris that should be monitored.
Responded to emergency service call for furnace with failed heat exchanger. Conducted thorough inspection of existing HVAC system, documented holes in heat exchanger creating safety hazard, photographed furnace unit and electrical panel, and provided comprehensive replacement estimate for new furnace system within requested timeframe.
Completed scheduled heating maintenance visit as part of recurring membership agreement. Performed system inspection including internal ductwork examination using borescope camera to verify proper installation and condition of flexible ducting and support structures. Confirmed thermostat operation with Honeywell Home ProSeries unit displaying proper temperature reading of 72°F and verified all control functions are operating correctly.
Completed comprehensive tune-up service on HVAC system, including inspection of control board wiring and electronic components within the unit housing. Documented existing wiring configuration showing multiple circuit boards with various colored wire connections; inspected condensate drain line assembly with 90-degree elbow fitting to ensure proper drainage function.
Responded to no heat call following thermostat replacement. Upon arrival, diagnosed furnace control issue preventing system operation. Inspected gas valve assembly, blower motor components, and verified all electrical connections were properly configured. Identified wiring discrepancy from recent thermostat installation that interrupted communication between thermostat and furnace control board. Corrected thermostat wiring to manufacturer specifications, restored proper 24V control circuit, and cycled system through multiple heating cycles to confirm reliable operation. Furnace now heating normally with all safety controls functioning as designed.
Completed residential water heater installation in basement utility area. New white cylindrical water heater was set on concrete floor and connected with copper supply lines, flexible metal tubing, and white PVC piping for proper drainage. Pressure relief valve and temperature gauge were installed and verified for safe operation.
# HVAC Tune-Up Completed Performed standard tune-up maintenance on residential HVAC system. Discovered evaporator coil heavily covered with frost and ice buildup, indicating abnormal operating conditions. Replaced 16x25x1 air filter as requested. Inspected system components including condensate drain piping, electrical connections, and control panel. Documented equipment condition with photographs showing extensive ice formation on evaporator coil fins and overall system configuration. System requires further diagnostic evaluation to determine root cause of freezing condition, which may include refrigerant charge verification, airflow assessment, or thermostat calibration.
Responded to no hot water call and performed comprehensive assessment of existing gas-fired water heater system. Documented current installation including copper supply piping, braided stainless steel flex connectors, gas line configuration with yellow CSST, and exhaust venting. Observed corrosion and discoloration on pipe fittings and connections indicating age-related deterioration. Evaluated all plumbing connections, gas supply components, and venting system. Provided detailed estimate for complete water heater replacement including removal of existing unit and installation of new equipment with necessary code-compliant connections.
Completed HVAC system service call addressing zoning system components. Replaced AA 700 filter as requested at no charge per prior authorization. Inspected and verified operation of zone panel, three zone dampers, and two thermostats in multi-zone configuration. System components located in basement mechanical space with proper labeling visible on first floor zone identification. All zoning controls and damper operations confirmed functional following service completion.
Responded to customer complaint of foul odor emanating from household water supply. Upon inspection of basement utility area, evaluated existing water treatment system including pressure tank, water softener unit, and associated plumbing connections. Assessed water quality issue and determined odor likely caused by bacterial growth in water heater or deteriorated anode rod. Documented existing equipment configuration with photographs showing pressure tanks, water softener control unit, and copper piping connections for service records and potential system upgrades.
Successfully removed and replaced deteriorated cast iron piping that was penetrating through the concrete block wall. Installed new white PVC piping system with proper fittings, couplings, and black rubber connectors to ensure secure connections throughout the assembly. The replacement included multiple horizontal and vertical pipe runs with appropriate elbow joints and transitions to accommodate the existing plumbing configuration in the utility room.
Responded to service call for water leakage along wall foundation originating from septic system piping. Upon arrival, conducted thorough diagnostic inspection of basement utility area and identified moisture intrusion patterns on concrete block walls. Documented existing plumbing infrastructure including sump pit assembly, PVC drainage lines, pressure tank, and pump control system. Traced water staining and discoloration on foundation walls to determine leak source and assess extent of water damage. Photographed affected areas showing septic piping connections, wall penetrations, and evidence of ongoing moisture issues for further evaluation and repair recommendations.