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 Whether your current system is outdated or struggling, we’re here to help.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 in October 2026.
The most recent job was on October 23, 2026.
Thielmann Heating, Cooling & Plumbing has completed 209 jobs in Slinger, WI in the last 12 months.
Job Locations and Reviews
Performed a furnace tune-up, inspecting the inducer blower assembly, wiring harness connections, gas valve, gas piping, and pressure switches, with all components found secure and free of visible rust, cracks, or frost. Verified electrical operation using a digital clamp meter and checked condensate and vent PVC piping and the surrounding air handler for proper condition. Unit operating normally at completion.
Performed a tune-up on the HVAC system, including a static pressure check with a digital manometer, which measured 1.69 inWC. Inspected the condensate drain piping, refrigerant line set, and plenum connections, and found no visible leaks, rust, ice, or damage. Verified system documentation and warranty paperwork were on file at the equipment.
Installed a Bradford White gas-fired storage water heater with new copper supply piping, brass shutoff valves, and a thermal expansion tank, and connected the metal flue vent to the existing chimney path. Gas supply and burner assembly were connected and verified, with the unit operating normally and no leaks or visible damage observed.
Performed a prepaid seasonal furnace tune-up as part of a recurring heating maintenance membership, inspecting the furnace, associated ductwork, and condensate drain piping in the unfinished basement. Verified the PVC drain lines and galvanized supply ducting were properly supported and free of visible damage, and confirmed the system was operating safely and ready for the heating season.
Installed a new Lennox gas furnace on a raised concrete pad in the basement, connecting the PVC intake/exhaust venting to the plenum and ductwork and tying into the existing black iron gas supply with a shutoff valve. Completed the electrical connections and condensate drain routing under permit, with a licensed electrician involved, then affixed the required rating and warning labels and posted contractor and maintenance information at the unit.
Inspected a leaking 50-gallon atmospheric-vent gas water heater and found moisture and staining at the base of the tank, indicating internal tank failure. Evaluated the existing installation, including the flue venting, gas control and burner assembly, and supply piping, and assessed the surrounding area for replacement. Prepared a replacement estimate for a new 50-gallon gas water heater.
Responded to a service call for a leaking condensate pump on a gas-fired Lennox furnace with an attached Space-Gard air cleaner. Inspected the Little Giant condensate pump and associated discharge tubing and hose connections, identified the pump as the source of the leak, and quoted replacement of the unit. The furnace, PVC venting, and ductwork were inspected and found intact, with no visible rust, frost, or damage.
Performed an on-site evaluation for furnace replacement, inspecting the existing upright gas furnace and air handler with galvanized plenum, PVC venting, gas piping, and adjacent water heater, with no visible rust, frost, or damage noted. Documented equipment data plates and installation conditions, including the closet access and clearances, to support replacement scope and equipment sizing.
Responded to a no-heat call on a 10+ year old gas furnace and removed the front access panel to inspect the burner assembly, gas manifold, gas valve, and draft inducer. Found surface rust on the gas manifold piping and burner compartment, along with soot and heat discoloration around the burner tubes and debris buildup in the cabinet, indicating combustion and corrosion concerns that need further attention to ensure safe, reliable operation.
Responded to a no-heat call on a 10+ year old Lennox gas furnace with red and green diagnostic LEDs flashing. Inspection found the integrated furnace control board heavily scorched and burned around the relay and capacitor area, with dust and grime buildup throughout the control compartment. Significant corrosion was also present in the cabinet base pan, with rust staining running onto the floor, indicating prior moisture or condensate leakage; the board failure and corrosion were documented with photos for the customer's review and further recommendations.
Performed an on-site evaluation for replacement of the original 1987 heating system, with the homeowner interested in upgrading to a heat pump or the best-suited option for the home. Inspected the existing flex duct and galvanized plenum connections, noting worn, foil-taped ductwork and a cut ceiling access opening, and verified the existing 30-amp double-pole breaker serving the equipment to assess electrical capacity for the new system. Findings will be used to recommend an appropriately sized, energy-efficient heat pump replacement and any necessary duct and electrical modifications.
Performed scheduled seasonal heating maintenance on the gas-fired furnace under the recurring membership agreement. Removed the lower access panel and inspected the inducer motor and housing, flue and vent piping connections, gas valve, control board, and wiring harness. No visible corrosion, frost, or component damage was observed, and the unit was left in good condition.
Connected the dishwasher to the water supply and drain, replaced the aging under-sink angle stop valves showing corrosion and mineral buildup with new chrome quarter-turn shutoff valves, and installed a new kitchen faucet with braided stainless steel supply lines. Tested all connections under pressure, verified proper valve operation, and confirmed there were no leaks.
Performed an on-site evaluation for replacement of the basement furnace, which had been shut down due to a failed heat exchanger. Inspected the installation area, including the nearby floor drain and the electrical service panel, to verify clearances and confirm available circuits for the new equipment. Confirmed the attic furnace (2017) is operating without issues and does not require replacement, and documented findings to support the replacement estimate for the basement unit.
Performed tune-ups on two furnaces, including inspection of the heat exchanger and blower assembly with a borescope camera, which revealed light debris and residue buildup on the blower wheel and heat exchanger surfaces. Cleaned and tested both units for proper operation, and installed a new thermostat.
Completed boiler repair work involving replacement of copper piping and fittings on the heating system. Installed new 3/4" couplings and connections using press tool to ensure proper sealing. Replaced brass pressure reducing valve and associated copper pipe sections showing oxidation and wear. Work included vertical pipe runs from boiler unit with proper insulation installation and integration with existing black insulated piping. All connections tested and verified for proper operation upon completion.
Responded to callback for utility sink installation correction. Upon arrival, assessed the mounting situation and determined that the original sink bolts were not properly secured. Reinstalled sink with bolts correctly anchored into the concrete floor using appropriate fasteners and adjustable leveling feet to ensure stable, level positioning of the utility sink unit.
Performed prepaid maintenance visit on residential HVAC system. Cleared and blew out condensate drain line for air conditioning unit, noting rust present in drain assembly. Opened furnace access panel to inspect internal components including blower motor, gas valve assembly, and electrical connections. Verified proper operation of heating system as part of recurring membership maintenance service.
Completed repipe of kitchen drain line using white PVC pipe with new P-trap configuration. Installed drain assembly with proper venting, connected supply lines, and verified all connections for leaks. All plumbing fixtures tested and functioning properly upon completion.
Completed preseason heating maintenance on 16-year-old Lennox furnace system. Performed comprehensive tune-up including inspection of gas valve assembly, burner components, heat exchanger, blower motor, and electrical connections. Verified proper operation of control board, tested system safety controls, and confirmed all mechanical and electrical components functioning within manufacturer specifications.
