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) 315-3067 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 Whether your current system is outdated or struggling, we’re here to help.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) 315-3067 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
Slinger, WI at a glance
Thielmann Heating, Cooling & Plumbing has completed 20 jobs in Slinger, WI between June 2026 and September 2026.
The most recent job was on September 22, 2026.
Thielmann Heating, Cooling & Plumbing has completed 180 jobs in Slinger, WI in the last 12 months.
Job Locations and Reviews
Completed comprehensive tune-up service on Magic Pak combination heating and cooling unit. Performed system diagnostics using digital manometer to verify proper static pressure readings, inspected serpentine heat exchanger coils for cleanliness and integrity, and tested both heating and cooling modes to ensure optimal operation.
Conducted on-site evaluation of existing HVAC system for replacement estimates. Assessed basement-located furnace and air conditioning unit, noting AC system experiences annual refrigerant leaks due to age and deteriorating components. Prepared two separate replacement estimates for furnace and AC system, discussed available promotional options, and documented existing equipment specifications and installation requirements.
Responded to no heat call where heating mode activated cooling instead. Upon inspection, discovered thermostat wiring had been incorrectly connected, likely from previous service work. Corrected thermostat wire connections at air handler to proper terminals, verified heating and cooling operations cycled correctly, and confirmed system now functions as intended with heat call producing warm air.
Completed heating tune-up service on MagicPak HVAC unit. Replaced thermostat batteries, installed new air filter, and performed system inspection with multimeter testing to verify proper electrical operation and heating functionality.
Conducted furnace replacement estimate for basement-located HVAC system. Assessed existing gas furnace and ductwork configuration, documented current equipment specifications and installation layout, and provided recommendations for replacement unit sizing and installation requirements.
Completed furnace tune-up and system inspection on residential HVAC unit. Performed comprehensive maintenance including visual inspection of internal components, blower motor assembly, and electrical connections with furnace access panel opened for thorough examination. Verified proper operation of condensate drain system and PVC venting configuration, checked all mechanical components for wear and proper function, and confirmed system is operating within manufacturer specifications.
Conducted furnace replacement estimate in unfinished basement area with exposed joists and existing HVAC infrastructure. Evaluated current system configuration, assessed available utility connections including existing PVC venting and electrical conduit, and provided equipment replacement recommendations to homeowner and family representative.
Removed existing water softener system and permanently capped supply and discharge lines. Installed proper air gap for discharge line to meet plumbing code requirements. Replaced outdated hose bib with new frost-free sillcock to allow proper hose attachment for outdoor water access.
Completed scheduled cooling system maintenance visit as part of recurring membership agreement. Performed comprehensive air conditioning tune-up inspection with standard preventive maintenance procedures. During inspection, documented significant concerns including severe corrosion and deterioration on system components. Observed heavy rust damage on cylindrical duct fitting with visible perforation, as well as extensive corrosion with white mineral deposits on blue-gray painted metal ductwork surfaces. Also noted brownish discoloration on interior surfaces suggesting potential moisture intrusion or water damage. Captured photographic documentation of deteriorated conditions for customer records and recommended follow-up repairs to address corrosion issues before further system degradation occurs.
Installed a 50-gallon power vent water heater in basement mechanical room, including connection of blue expansion tank and copper piping integration with existing plumbing system. The unit was successfully installed with PEX supply lines and proper venting configuration, with all connections tested and operational upon completion.
Completed comprehensive tune-up maintenance on two furnace units, performing full system diagnostics and safety inspections. Verified proper equipment leveling, tested differential pressure readings showing 35°F temperature splits, and inspected refrigerant lines and connections for integrity. Customer provided filter for unit replacement as part of scheduled preventative maintenance service.
Conducted estimate for boiler replacement in basement utility area. Customer currently operates electric boiler system and requested conversion to propane-fired unit. Assessed existing hydronic heating distribution system with copper piping manifolds, evaluated electrical panel configuration, and confirmed walk-out basement access for equipment delivery and installation.
Responded to service call for Magicpak-179 unit with water leakage affecting the unit below. Performed inspection of both sides of the vertical stack HVAC system installed in confined utility space. Examined serpentine heat exchanger coils showing heat discoloration and inspected condensate drainage system including white PVC piping. Identified source of water intrusion and cleared condensate drain line blockage to resolve leakage issue. Verified proper drainage flow, checked air handler components, and confirmed system operation. Unit restored to normal function with no further water discharge into lower unit.
Responded to no heat call on 10+ year old vertical HVAC system. Upon arrival, diagnosed furnace ignition failure and completed necessary repairs to restore heating operation. System tested and verified operational before departure.
Responded to emergency water heater replacement request due to active water leak beneath existing unit. Assessed brown cylindrical water heater in basement utility area with visible water accumulation at base, confirmed immediate replacement necessary to prevent further water damage and restore hot water service. Documented existing installation including copper supply lines, black rubber connections, proximity to water softener system, and current venting configuration through exposed ceiling joists for replacement estimate and planning purposes.
Conducted on-site assessment for new gas line installation to supply fireplace. Evaluated attic space routing options, existing utility pathways, and structural considerations for proper gas piping placement. Documented attic access area showing exposed wooden framing, existing electrical conduits, and available routing corridors for safe gas line installation per code requirements.
Responded to service call for A/C unit with reported refrigerant leak. Upon arrival, performed temperature diagnostics on the system, measuring supply air temperature at 52.3°F and return air temperature at 67.8°F, confirming adequate temperature differential and proper cooling operation at time of inspection. Visually inspected refrigerant lines and connections at the air handler, noting copper piping with existing insulation. System operational at time of departure, customer advised to monitor for any further issues.
Completed installation of 40-gallon electric water heater in residential basement utility area. Installed new unit with proper plumbing connections using copper piping, brass fittings, and shut-off valves. Mounted blue expansion tank on wall and connected to system per code requirements. Configured all supply and discharge lines with appropriate flexible connectors at base of unit. Verified all electrical connections, tested system operation, and confirmed proper function of all components upon completion.
Responded to no cooling complaint on residential air conditioning system over 10 years old. Diagnosed failed compressor and presented repair options to customer. Customer approved compressor replacement, and unit was successfully repaired and returned to normal cooling operation.
Conducted comprehensive duct cleaning estimate for residential HVAC system featuring vertical air handler unit with flexible ductwork connections in basement utility area. Assessed accessible ductwork, air handler cabinet, and adjacent furnace system with copper piping to determine scope of cleaning services required for optimal system performance and indoor air quality improvement.
