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 Whether your current system is outdated or struggling, we’re here to help.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
Conducted site assessment and provided estimate for replacement of interior water shut-off valve and exterior hose spigot. Inspected existing copper supply line running through ceiling cavity and evaluated current valve condition, noting blue-handled shut-off requiring replacement. Documented mechanical chase area showing copper plumbing infrastructure, HVAC ductwork, and structural framing to determine scope of work and access requirements for proposed fixture replacements.
Completed full HVAC system installation including new air conditioning condenser unit and furnace. Installed outdoor condensing unit on concrete pad with proper clearances from structure, mounted Eaton electrical disconnect box to exterior wall, and ran gray PVC conduit for electrical connections. Routed refrigerant line sets with insulation between outdoor and indoor units. System was pressure tested, evacuated, and charged to manufacturer specifications. All electrical connections completed per code requirements, unit tested and confirmed operational with proper airflow and cycling.
Completed comprehensive furnace and air conditioning tune-up with emphasis on gas safety inspection. Performed combustion analysis using Testo 310 II analyzer, which confirmed safe operating parameters with CO readings at 7.5 ppm and oxygen levels at 88.9%. Thoroughly inspected all accessible HVAC components, ductwork, and gas connections with no gas leaks detected throughout the system.
Performed annual tune-up on HVAC system, including pressure and temperature diagnostics using manifold gauge set to verify refrigerant charge and system performance. Observed heavy condensation on suction line with deteriorated insulation at connection point, indicating potential insulation replacement needed to prevent efficiency loss and moisture damage.
Completed preventive maintenance cooling visit on residential air conditioning system as part of prepaid membership agreement. Performed standard system inspection and diagnostics using manifold gauge set to check refrigerant pressures and verify proper operation of condenser unit. All components inspected and system operating within normal parameters.
Conducted comprehensive estimate for complete HVAC system replacement including aging furnace and air conditioning unit located in basement mechanical room. Both units currently operational but have exceeded recommended service life and require replacement to ensure continued reliability and efficiency. Documented existing equipment configuration including outdoor condensing unit, refrigerant lines, ductwork connections, and basement furnace installation with supporting photography for proposal development.
Completed inspection for sprinkler system meter installation requiring new water meter and approximately 5 feet of supply piping. Assessed existing plumbing configuration including water pressure regulator assembly with mixed piping materials (PVC, copper, and PEX), and evaluated ceiling cavity access point where copper supply lines with shut-off valve are located above insulation and structural framing. Documented current system conditions and photographed installation areas to provide accurate estimate for meter replacement and piping extension work.
Conducted on-site assessment of existing gas furnace located in basement for replacement estimate and evaluated home for new air conditioning system installation. Documented current equipment configuration, ductwork routing, and available space for new HVAC components, noting that existing furnace is currently operational.
Conducted comprehensive duct cleaning estimate for residential HVAC system. Evaluated existing ductwork configuration and assessed feasibility of adding supplemental vent to improve heat distribution to basement area, documenting current system layout including furnace, plenum assembly, and air filtration components.
Completed installation of mini split air conditioning system in all-electric residential property. Installed indoor air handler unit, outdoor condenser, refrigerant line set, condensate drain, and electrical connections to existing panel with new dedicated circuit breaker for system operation. System tested and confirmed operational upon completion.
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