Looking for comprehensive property system services for your home or business in New Berlin, Wisconsin? Thielmann Heating, Cooling, & Plumbing specializes in diverse plumbing, heating and cooling system solutions. We’re a full-service company offering repairs, maintenance, installations and replacements. Plus, we have 24-hour emergency HVAC services for your urgent needs!
Reliable HVAC System Repair, Replacement, & Maintenance Services
New Berlin’s weather can make it challenging to keep your home comfortable. When the temperatures skyrocket or plunge, ensure your HVAC system can handle it.
We are your go-to team for professional air conditioning, furnace, heat pump, and other HVAC services in the local New Berlin, WI area. We have the tools and expertise to get your systems working right so you can enjoy comfortable temperatures throughout your home or business.
Keeping cool in the summer requires a good air conditioner. Whether you need AC repair, replacement, maintenance, or installation services, count on our team to get the job done right.
We work on all types of cooling systems, including:
- Air conditioners: We can work on all models of air conditioning systems for residential and commercial properties.
- Heat pumps: We can repair, replace, or maintain energy-efficient heat pumps that deliver warm air inside and outside the home.
- Ductless mini-splits: We can service ductless HVAC units that provide total climate control for single rooms.
Contact our team at (262) 299-6197 to schedule AC services in New Berlin.
Additional Heating and Cooling Support We Offer
In addition to our HVAC system specialties, we can assist you with various heating solutions and components, including:
Top-Rated Heating System Services
Staying warm during the Wisconsin winter can be a struggle if your furnace, heat pump, or boiler isn’t working perfectly. No matter what is wrong with your HVAC system, we can fix it. Our team offers heating repair, replacement and maintenance services for heating systems like furnaces, boilers and heat pumps. Our professionals will help keep your New Berlin home warm throughout winter.
HVAC Ductwork Services in New Berlin
The air ducts around your home or business are the only link between your HVAC system and your rooms. You’ll have serious system trouble if any ducts are cracked, broken, disconnected, or blocked.
Our company provides comprehensive ductwork services in New Berlin. We offer air duct installation, repair, maintenance and cleaning so you can get the most out of your HVAC system.
For all your ductwork needs, call (262) 299-6197 or contact us online to schedule services today.
Reliable Indoor Air Quality Services
The air in your home can be dirtier than you may think. Dust, debris, and other harmful contaminants could be in your air, leading to respiratory illnesses and HVAC damage. The team at The Thielmann Group offers indoor air quality services, including:
- Air purifiers
- Humidifiers
- Dehumidifiers
Enjoy clean, safe air throughout your home.Schedule indoor air quality services in New Berlin by contacting us online or calling (262) 299-6197.
Commercial and Professional HVAC Unit Services
Commercial properties need top-quality HVAC systems that are made to last. Whether you need service for your system or a new one installed, look to our team for packaged unit services. We work on all brands of commercial-grade packaged HVAC units. Our team also installs packaged units for residential properties, allowing homeowners to have heating and cooling from a single, robust system. These convenient, energy-efficient systems allow for quick heating and cooling.
Trusted Plumbing Solutions for New Berlin, WI Homes
Plumbing issues never come at a good time. Whether you’re dealing with a dripping faucet or a flooded basement, Thielmann Heating, Cooling, and Plumbing provides the professional service New Berlin homeowners rely on. Our licensed plumbers are trained to handle every type of repair, replacement, and installation with precision and care.
From minor leaks to full system upgrades, we handle it all. Our technicians repair broken pipes, unclog drains, and replace worn fixtures that waste water and raise utility bills. If your water heater is struggling, we can repair it or install an energy-efficient model suited to your household. We also offer sump pump maintenance and water filtration systems that protect your home’s foundation and improve water quality.
Why homeowners in New Berlin choose Thielmann:
- Fast response times for urgent repairs
- Clear communication and upfront pricing
- Work completed to meet all local plumbing codes
- Licensed, insured professionals with years of experience
Our full range of plumbing services includes:
- Water heater repair and installation (tank and tankless)
- Drain cleaning and obstruction removal
- Leak detection and pipe replacement
- Sump pump service and installation
- Fixture, toilet, and faucet upgrades
- Garbage disposal repair and replacement
- Water treatment and filtration systems
Your plumbing system should work without worry. Thielmann Heating, Cooling, and Plumbing keeps your New Berlin home safe, efficient, and comfortable. Call today for prompt service or 24/7 emergency support when you need it most.
We Also Offer Water Conditioning Services for Clean, Safe Water
Water conditioning can clean your water, providing health benefits for you, your family or your patrons. We provide the following commercial and residential water conditioning services:
- Water filtration, including specialized carbon, reverse osmosis and sediment filters
- Whole-house filters for clean water flow through all your fixtures
- Iron curtains that eliminate sulfur, iron and manganese from water
- Water softening solutions to decrease unwanted mineral contents of hard water like calcium and magnesium
Introducing one or more of these solutions can improve the longevity of your appliances and clothing, promote better cleaning, decrease rust stains and enhance overall water quality for drinking.
Choose Thielmann Heating, Cooling, & Plumbing in New Berlin for Expert Service
Since 1929, our team has been a go-to choice for top-quality residential and commercial services in New Berlin and beyond. Our NATE-certified technicians can service all HVAC brands, install Lennox-brand units, offer 24-hour emergency care and more. You can also trust our team for extensive plumbing maintenance, repairs and installations. Plus, we offer diverse financing options, upfront pricing, special deals and a job well done. Contact us online or call (262) 384-6407 to schedule your service appointment.
Read Reviews by Our Customers
Recent Jobs and Reviews in New Berlin, WI
New Berlin, WI at a glance
Thielmann Heating, Cooling & Plumbing has completed 20 jobs in New Berlin, WI in December 2025.
The most recent job was on December 17, 2025.
Job Locations and Reviews
Performed routine HVAC tune-up service with comprehensive inspection revealing mold growth inside ductwork. Conducted diagnostic testing with UEI instrument on system parameters, confirming acceptable operational readings within manufacturer specifications.
Successfully installed new rooftop venting system for furnace replacement, including proper mounting and sealing of exhaust fixtures on asphalt shingle roof. Applied professional-grade sealant around vent bases to ensure weatherproof installation and compliance with manufacturer specifications.
Performed annual prepaid maintenance on residential furnace system. Accessed and inspected internal components including control board, wiring connections, and exhaust venting. Unit is functioning within normal parameters after service.
Completed installation of a complete Lennox HVAC system, including proper installation of ductwork in the basement and connection of all necessary plumbing components. Mounted and programmed a new Lennox digital thermostat, confirming proper system operation with successful temperature reading and control functionality.
Performed diagnostic service on aging ceiling-mounted HVAC unit installed in garage workshop. Discovered failed ignition control module preventing proper heating function. Replaced control module, cleaned burner assembly, and verified proper ignition sequence and heat output. Unit now operating within normal parameters.
Conducted standard HVAC tune-up which included diagnostic testing with UEi meter showing temperature reading of 672. Inspected control board and wiring, confirming proper connection of control wires (red, yellow, and blue) to circuit board with LED indicators functioning normally. No issues detected with the system electronics or control components.
Conducted warranty service inspection of HVAC system, which included examination and documentation of air filtration components showing accumulation of particulate matter on the filter frame. Additionally, inspected and photographed exterior condensate drainage system, noting proper PVC elbow installation and confirming drainage path through foundation gravel, though observed some ice formation at discharge point that should be monitored during freezing conditions.
Performed comprehensive tune-up service on Lennox HVAC furnace system located in basement mechanical room. Inspected intake and exhaust PVC piping, verified proper connections, and checked all visible manufacturer labels for compliance. System appears to be in good working condition with no visible damage, leaks, or operational issues detected.
Replaced bathroom sink faucet with new chrome model, ensuring proper water flow and no leaks. Also installed coordinating soap dispenser and drain stopper assembly. All connections were pressure tested and working correctly.
Installed a complete residential hot water system including a Bradford White water heater with proper venting, copper supply lines, and PVC drain connections. System includes a wall-mounted blue expansion tank with appropriate valves, thermometer, and brass fittings to ensure optimal pressure regulation and temperature control.
Completed installation of furnace unit in unfinished basement with proper routing of PVC exhaust and intake piping through ceiling joists. Ensured proper electrical connections at the circuit board, with wiring properly secured and organized using zip ties. Verified all control terminals and warning labels were intact for safe system operation.
Completed HVAC Maintenance Agreement service on Amana furnace system. Performed comprehensive diagnostic testing with digital measurement tools to ensure optimal system performance and efficiency. All maintenance tasks completed according to manufacturer specifications with system now operating within normal parameters.
Performed inspection and evaluation of existing furnace (model SLP98UH090XV36C-04) in basement utility area. Documented infrastructure including water heater ventilation and ceiling-mounted PVC exhaust/intake piping system with multiple 90-degree joints. Noted proper installation of electrical connections including ground wire placement. Prepared comprehensive replacement estimate for customer review.
Diagnosed and repaired a Lennox furnace that was failing to produce heat. Upon inspection of the unit installed in the basement, identified a faulty flame sensor which was preventing proper ignition. Cleaned the corroded flame sensor, tested system operation through multiple heating cycles, and verified proper flame detection and heat output restoration.
Performed routine maintenance tune-up on a Lennox HVAC system located in the utility area. Conducted electrical diagnostics using a Fieldpiece SC680 multimeter, which showed a reading of 5684 during component testing. Inspected all connections, ductwork, and PVC venting for proper installation and functionality, confirming system is operating within normal parameters.
Performed complete system tune-up on heating unit. Identified significant gaps in ductwork insulation requiring attention. Recommended duct sealing service to address energy loss and potential system inefficiency.
Performed routine tune-up maintenance on Lennox furnace system. Inspected unit for proper operation and identified signs of corrosion at connection points. Cleaned and serviced system components including the Spaceguard Air Cleaner. Verified integrity of PVC venting system and electrical connections to ensure safe, efficient operation for the heating season.
Conducted comprehensive assessment of existing HVAC system in residential basement requiring replacement. Inspection revealed aging furnace unit with associated PVC intake/exhaust venting and electrical connections. Evaluated ceiling infrastructure access points for potential ductwork modifications to improve system efficiency.
Performed routine maintenance on Lennox furnace system. Inspected interior ductwork, verified proper installation of PVC exhaust and intake venting, and confirmed Aprilaire equipment integration. All components found to be in normal operating condition.
Performed comprehensive tune-up on furnace system, including internal component inspection and combustion analysis. Verified proper wiring connections throughout the unit. Conducted flue gas testing with Testo analyzer, confirming efficient operation with excellent combustion readings (87.2% efficiency, CO at safe levels of 3 ppm, and proper air/fuel mixture with 3.97% CO₂).
