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 Whether your current system is outdated or struggling, we’re here to help.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
Completed comprehensive HVAC maintenance agreement service on Lennox furnace system. Performed thorough inspection of air handler unit, verified proper operation of all mechanical components, checked manufacturer specification labels for compliance, and inspected intake and exhaust vent piping. Examined ductwork connections, flexible piping, and control modules to ensure system integrity and optimal performance for continued reliable heating and cooling operation.
Conducted comprehensive site evaluation for complete HVAC system replacement at residential property. Assessed existing outdoor condensing unit positioned against brick exterior wall, documented current equipment configuration including electrical disconnect box, conduit routing, and refrigerant line placement. Evaluated installation area conditions including mulch bedding, patio brick surface, and clearance requirements for new equipment placement. Photographed existing unit with protective cover in place and exposed condenser unit to document current system specifications, mounting location, and utility connections. Provided detailed replacement estimate covering removal of existing equipment and installation of new high-efficiency HVAC system with properly sized condensing unit, updated electrical connections, and compliant refrigerant line routing across herringbone brick patio surface.
Completed system start-up on newly installed HVAC equipment. Performed electrical diagnostics using clamp meter to verify proper amperage draw and electrical connections at the outdoor unit, confirming all readings within manufacturer specifications at 0.60 amps. Measured supply air temperature at 60.2°F using calibrated digital thermometer to verify system cooling performance and proper refrigerant charge. All components operating normally with no deficiencies noted.
Performed combustion analysis and efficiency testing on residential furnace system. Flue gas measurements indicated temperature of 80.9°F, oxygen level of 6.4%, and carbon monoxide reading of 25 ppm, confirming proper combustion and safe operation within acceptable parameters. Inspected PVC condensate drain piping installation in crawl space area, verifying proper slope and secure connections of Schedule 40 piping with appropriate support and insulation wrapping where required.
Completed furnace installation in basement utility area. New system includes properly sized supply and return ductwork with insulated flexible ducting connected to metal plenum. All vent piping installed to code specifications with appropriate PVC materials for condensate drainage and exhaust venting through exterior wall penetration.
# Residential Furnace Warranty Inspection Performed comprehensive warranty inspection on residential gas furnace installation. Verified proper operation of all system components including ignition sequence, burner assembly, and heat exchanger. Confirmed PVC intake and exhaust venting meets manufacturer specifications and local code requirements. Inspected gas supply piping connections for proper sizing and leak-free operation. Tested blower motor operation and airflow delivery. Verified all safety controls including limit switches and flame sensors functioning within normal parameters. System operating efficiently with no deficiencies noted.
# Warranty Service Completed Performed warranty inspection on residential HVAC system. Examined internal components including refrigerant lines, drain connections, and condensate management system. Verified proper installation of drain hose with secure clamp connections and confirmed all mechanical fittings were properly seated. Documented equipment nameplate information and serial number for warranty verification. All components found to be functioning within manufacturer specifications with no defects identified.
Responded to service call back for HVAC system inspection and diagnostics. Upon arrival, accessed furnace unit and control board displaying "H" error code on LED display. Performed thorough system evaluation including inspection of wiring connections, blower motor assembly, refrigerant lines, and electrical components. Verified all wire terminations at control board, checked for loose connections, and ensured proper seating of wire harnesses in white plastic connectors. Inspected condition of rubber boots on vertical discharge pipes and confirmed secure mounting of unit. System tested and operational parameters verified within manufacturer specifications.
Completed furnace repair involving inspection and servicing of internal heating system components. Accessed furnace cabinet to examine electrical connections, pressure switches, gas valve assembly, and condensate drainage system. Verified proper operation of safety controls and tested all electrical connections throughout the unit. Inspected and serviced PVC condensate drain lines and mounting hardware to ensure proper drainage function. All components tested and confirmed operational upon completion of service work.
# HVAC Service Report - No Heat Call ## Service Summary Responded to no heat call on residential gas furnace unit over 10 years old. Performed diagnostic inspection, identified failed components, and restored heating operation to customer's home. ## Work Performed Upon arrival, conducted initial system assessment with front access panel removed to inspect internal components. Verified no heat condition and began systematic troubleshooting of the aging furnace system. Inspected blower motor assembly located in lower section of unit, examining electrical connections and motor functionality. Tested all wire connections including green ground, red power, white common, and blue control wires throughout the system. Verified integrity of wire harness and connector blocks for proper continuity. Examined gas valve assembly and associated copper tubing in upper section of unit for proper operation and gas flow. Inspected control board and wiring connections, noting multiple colored wire run
Successfully installed a complete HVAC system consisting of an outdoor condensing unit mounted on a concrete pad with proper electrical connections and a new indoor air handler/furnace unit. System was fully connected with appropriate refrigerant lines, electrical components, and condensate drainage, then tested for optimal performance and efficiency.
Installed new PVC drainage system for HVAC condensate line with proper labeling and secured connections. System includes vertical runs with appropriate elbows and joints, connecting to existing ductwork. All components were installed to code with necessary support brackets and insulation bands at connection points.
Conducted assessment of aging HVAC system in utility space. Identified deteriorated ductwork with compromised insulation and oxidized copper piping connections. Recommended full system replacement including properly insulated ductwork, updated ventilation components, and replacement of corroded plumbing connections to restore optimal system efficiency and prevent potential failures.
Responded to no-heat complaint on Coleman furnace (less than 10 years old). Performed visual inspection of unit which appeared in normal working condition with no visible damage or anomalies. Diagnosed faulty flame sensor, cleaned and reinstalled component, verified proper ignition sequence and heat output. System now operating within manufacturer specifications.
Performed inspection and verification of Hunter digital thermostat functionality. Confirmed proper temperature readings (72°F/70°F) and tested control buttons for appropriate system response. Unit is properly mounted and operational with no apparent issues.
Performed comprehensive inspection of furnace components including fan motor assembly and pressure switch. Verified proper wire connections throughout control system with focus on intact wire caps and secure terminations. Confirmed pressure switch functionality with all indicators operating as specified.
Completed installation of a new residential water heater system with proper connections to existing plumbing. Installed blue expansion tank with copper pipes and brass valves on top of the unit, and ensured pressure relief valve was correctly positioned. System was tested for proper operation and all connections were verified leak-free before completing the job.
Performed comprehensive maintenance on residential HVAC furnace system. Inspected and tested all electrical components including circuit board, wiring connections, and control assembly for proper operation. Examined gas supply lines, blower motor assembly, and exhaust ventilation system, confirming all components are functioning within manufacturer specifications.
Performed inspection of existing Bryant furnace and Carrier air conditioning system in basement utility area. Documented current condition of HVAC equipment, water heater, and associated ductwork/piping for replacement estimate. System shows signs of age with possible previous moisture issues noted on concrete floor beneath units.
Inspected cast iron drain stack in basement utility area showing signs of surface corrosion and age-related deterioration. Documented condition of pipe connections, support brackets, and surrounding moisture damage to wooden framing. Recommended preventative maintenance to address early signs of deterioration before significant issues develop.