Your home is your sanctuary, and at Thielmann Heating, Cooling & Plumbing, we’re here to help keep it that way. Since 1929, we’ve been the trusted name in the Grand Rapids area for heating, cooling, and plumbing services that go beyond quick fixes—we focus on long-term comfort, reliability, and efficiency. Our team takes a hands-on approach, ensuring that every repair, installation, and maintenance job is done with precision and care. We know what it takes to keep a home running smoothly, and we’re committed to delivering Slinger home services that give you confidence in your home’s essential systems, no matter the season. When you need the best, call the Thielmann team at (262) 299-6197 or contact us online for more information.
Dependable Slinger Heating Services

Having a dependable heating system means more than just staying warm—it’s about keeping your home safe and comfortable through the toughest months of the year. Whether your current system is outdated or struggling, we’re here to help. The team of Slinger HVAC technicians at Thielmann takes the time to understand your space, energy needs, and comfort preferences to recommend the best heating solution for your home, so you can enjoy consistent, reliable warmth all season long. Our heating services in Slinger include:
Boiler Maintenance & Repair
Boilers offer steady, even heating, but they need regular care to keep running efficiently. Our Slinger HVAC technicians provide comprehensive maintenance, checking for leaks, flushing the system, and ensuring proper pressure so your boiler continues to deliver dependable warmth. If it’s time for a replacement, we’ll guide you through the best options available.
Furnace Installation & Replacement
Is your old furnace struggling to keep up? A new, energy-efficient system can make a world of difference in both warmth and energy costs. We help homeowners choose the right furnace for their home, ensuring it’s the perfect size and properly installed for maximum efficiency. No more cold spots, no more sky-high heating bills—just reliable warmth when you need it most.
Preventative Heating Maintenance in Slinger
Regular tune-ups help keep your system running smoothly and efficiently, reducing the risk of breakdowns when you need heat the most. Our heating maintenance services ensure your heating system in Slinger stays in peak condition, saving you money on repairs and energy bills in the long run.
Fast, Reliable Heating Repairs
A broken heating system in the middle of winter is more than an inconvenience—it’s an emergency. We respond quickly to diagnose the issue and get your heat back on as soon as possible. From minor fixes to major repairs, we have the expertise to restore warmth to your home without unnecessary delays.
Slinger Cooling Services That Beat the Heat
If your Slinger air conditioning system is working overtime and still not keeping up, it might be time for an upgrade or a professional maintenance call. Our team of local HVAC technicians focuses on more than just quick fixes—we assess airflow, insulation, and system efficiency to make sure your cooling setup is working at its best. Our cooling services in Slinger include:
- AC Installation & Replacement: If your current system isn’t keeping up, we’ll help you choose and install an energy-efficient AC unit that delivers powerful cooling without breaking the bank.
- Ductless Mini-Split Systems: Perfect for homes without central air, mini-splits offer precise temperature control while saving energy.
- AC Repairs: Strange noises? Weak airflow? Warm air instead of cold? We quickly diagnose and fix any issue, so your system runs like new again.
- AC Maintenance Plans: Prevent breakdowns and extend the life of your AC with seasonal tune-ups that improve performance and reduce energy costs.
Comprehensive Plumbing Services in Slinger

A plumbing issue can throw your whole day off track, whether it’s an annoying drip, a water heater that suddenly quits, or a pipe that bursts without warning. Instead of stressing over leaks and repairs, let us handle it. With Slinger plumbing services from Thielmann, you get a team that will tackle every job with precision, whether it’s a simple fix or a major installation, so you can get back to your routine without the headache.
- Leak Detection & Pipe Repairs: We locate and repair leaks before they lead to major water damage, ensuring your pipes remain durable and efficient.
- Garbage Disposal Installation & Repair: Whether installing a new unit or repairing a jammed disposal, we help keep your kitchen running smoothly.
- Toilet Repairs & Replacements: From fixing persistent leaks to installing modern, water-efficient toilets, we provide expert solutions for your bathroom.
- Plumbing System Inspections: Regular inspections can catch small issues before they become major problems, helping you avoid costly repairs and water damage.
- Water Heater Installation & Service: We install, repair, and maintain both traditional and tankless water heaters, ensuring you always have hot water when you need it.
- Fixture Installations & Upgrades: Upgrade your kitchen and bathroom with high-efficiency sinks, faucets, and toilets that enhance both function and style.
- Sump Pump Installation & Maintenance: Keep your basement dry with professional sump pump installation and maintenance to prevent flooding and water damage.
- Water Softener Systems: Improve your water quality by reducing hard water buildup, protecting appliances, and making daily cleaning easier.
Why Homeowners Trust Thielmann Heating, Cooling & Plumbing
For nearly a century, we’ve built a reputation for excellence, and we’re proud to be the go-to home service provider in Slinger. Here’s why homeowners continue to choose us:
- Generations of Expertise: With over 90 years in business, we’ve seen it all and know what works best for homes in the area.
- Top-Quality Products & Workmanship: We only use the best materials and equipment, ensuring every repair and installation is built to last.
- Personalized Service: Every home is unique, and we take the time to find solutions that fit your specific needs and budget.
- Honest, Upfront Pricing: No surprises, no gimmicks—just straightforward pricing and clear explanations of the work we do.
- Fast & Friendly Service: We respect your time and work efficiently to restore comfort to your home as quickly as possible.
Schedule Your Service in Slinger Today
At Thielmann Heating, Cooling & Plumbing, we know that a comfortable home isn’t just about functioning comfort systems—it’s about peace of mind. Whether your heating needs a tune-up, your AC could use an upgrade, or your plumbing is acting up, we’re here to provide expert service you can trust. Reach out today by calling (262) 299-6197 to schedule an appointment and let us handle the hard work while you enjoy the comfort of a well-maintained home.
Recent Jobs and Reviews in Slinger, WI
Job Locations and Reviews
Performed routine maintenance tune-up on HVAC unit. Inspected interior components including motor, wiring, and circuit board for proper function. Examined PVC condensate lines and ductwork connections, confirming all systems operating within normal parameters.
Performed inspection of electrical panels related to HVAC system replacement assessment. Examined two breaker panels showing signs of age and wear. Documented existing circuit configuration, including labeled water heater and furnace connections. Panels exhibited normal deterioration consistent with older installation but remain functional. Photos taken for electrical load capacity evaluation prior to equipment selection and installation planning.
Performed diagnostic inspection on tankless water heater, examining internal components including heat exchanger, circuit board, and copper piping connections. Removed cover to access and evaluate electronic components, focusing on the control board with multiple colored wiring connections. Inspected L-shaped copper pipe assembly and associated clamps for proper installation and potential leaks. System was reassembled after verification of proper operation.
Performed comprehensive tune-up on Trane furnace and Honeywell HVAC system. Inspected all components, cleaned heat exchanger and burners, and verified proper operation of safety controls. System is functioning efficiently with no issues detected.
Conducted electrical panel inspection to identify appropriate circuit breakers for HVAC system replacement. Evaluated existing panel capacity and documented circuit labeling for proper connection of new equipment. Assessed service area access and workspace conditions in preparation for installation.
Completed inspection of existing HVAC system installation in utility space. Documented primary furnace/air handler unit with associated PVC exhaust/intake piping, copper refrigerant lines, and connected ductwork. System appears to have standard installation with proper venting configuration. Photos taken of plumbing connections and main HVAC unit for reference in replacement estimate.
Performed inspection of metal ductwork system, examining interior surfaces for signs of corrosion and structural integrity. Observed minor discoloration and light corrosion along bottom seams of galvanized sheet metal, with some dust accumulation. System appears functionally intact with no significant damage requiring immediate repair.
Conducted inspection of residential HVAC system with focus on the furnace unit. Examined internal components including electrical connections and wiring integrity. Verified proper installation of ventilation pipes, drainage systems, and associated components including the adjacent air filtration system.
Performed routine tune-up on Carrier Comfort furnace system located in basement utility room. Inspected all components including ductwork, PVC ventilation piping, electrical connections, and air filter. System appears to be in good working condition with no visible damage or wear detected.
Performed standard tune-up service on residential furnace system. Inspected interior components including gas valve assembly, control module, and electrical connections - all found in normal working condition with no visible damage or abnormal wear. Examined condensate drainage system with PVC piping; verified proper installation and functionality of all ventilation components.
Responded to callback regarding improperly sealed condensate drain lines. Upon inspection, identified excessive red PVC cement/primer around pipe connections causing wall staining. Cleaned affected areas, resealed connections properly, and verified drainage system functionality.
Performed routine maintenance inspection on residential HVAC system in basement utility area. Examined main ductwork system, drainage components, and PVC ventilation pipes - all connections secure with no visible leaks or damage. System functioning properly with no issues requiring repair at this time.
Completed comprehensive tune-up and maintenance of residential HVAC system in basement utility area. Inspected furnace internal components (control board, motor, wiring) with front panel removed for thorough examination. Evaluated gas line connection and PVC exhaust/intake pipes, along with associated drainage and condensate removal system to ensure proper function and prevent potential issues.
Conducted visual inspection of wall-mounted HVAC unit. System appears to be in good working condition with clean installation and no visible damage or deterioration. Unit is properly secured to wall with adequate clearance for optimal airflow.
Completed comprehensive inspection of drainage infrastructure in utility space. Verified integrity of PVC pipe configuration including multiple elbow joints and U-shaped pathway. All connections and coupling bands were confirmed secure with no signs of leakage.
Completed routine tune-up service of the HVAC system in the utility area. Inspected PVC drainage pipes and galvanized ductwork, confirming all components were in good condition with no leaks or damage. Verified proper ventilation and drainage system functionality.
Performed routine tune-up service on HVAC system. Observed significant dust accumulation in ventilation compartment requiring thorough cleaning. Identified and documented severe rust/corrosion on copper pipe connections near blower assembly that will require replacement to prevent potential system failure.
Successfully installed a new high-efficiency furnace in the utility room with properly connected PVC venting system. Ensured all connections to existing mechanical systems were properly secured, including gas line and electrical components. Unit was tested for proper operation with the EnergyGuide label affixed to confirm efficiency ratings.
Replaced faulty gas valve on aging furnace to restore heat function. Properly reconnected all wiring to new valve assembly and verified proper ignition sequence. System now operating within normal parameters.
Performed gas line inspection and pressure test on a water heater installation. Located and tightened loose hex union connection on the gas supply pipe, which was causing a leak. Confirmed system integrity with final pressure test showing no further leaks in the gas line.