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50+ Years
experience
Emergency
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Your Trusted HVAC Partner in Cashton, WI
Flock's Heating & Air Conditioning is a family-owned and operated business serving Wisconsin for over 55 years. Founded in 1960, we specialize in heating, ventilation, and air conditioning solutions for residential and commercial clients across west central Wisconsin. Our team of NATE-certified technicians delivers expert installation, repair, and maintenance services, including geothermal systems, central air conditioning, and high-efficiency heating. We prioritize customer satisfaction through personalized service, competitive pricing, and a commitment to treating clients as we would wish to be treated.

With a legacy of excellence, we partner with industry leaders like WaterFurnace International to provide cutting-edge technology. Our maintenance plans ensure year-round comfort, while 24-hour emergency services address urgent needs promptly. Recognized as ClimateMaster Wisconsin Geothermal Contractor of the Year, we combine technical expertise with community values. Our mission remains rooted in integrity, reliability, and delivering value to every customer we serve.
Services
Air Conditioning Repair Heating Repair Geothermal Systems Maintenance Plans Indoor Air Quality
Details
  • Year established: 1960
Highlights and features
  • We offer 55+ years of family-owned HVAC expertise in Wisconsin
  • Our team includes NATE-certified technicians for superior technical proficiency
  • We provide 24-hour emergency service for urgent HVAC needs
  • We partner with industry-leading brands like WaterFurnace International
  • Our maintenance plans include priority service and repair discounts
What people say
Prompt and expert solutions Professional and courteous technicians Excellent service 24-hour emergency response Knowledgeable and respectful staff
Services
Air Conditioning Repair
Our NATE-certified technicians provide prompt air conditioning repair services for residential and commercial systems. We diagnose and fix issues like refrigerant leaks, compressor failures, and electrical problems to restore cooling efficiency. With 24-hour emergency availability, we ensure minimal downtime during peak summer months.
Geothermal Systems
We specialize in geothermal heating and cooling systems that utilize ground-source energy for maximum efficiency. Our experts handle installation, maintenance, and repair of WaterFurnace systems, helping customers reduce energy costs while maintaining environmental sustainability through proven ground-loop technology.
Heating Repair
Our team addresses all heating system emergencies, from pilot light issues to complete furnace failures. We service oil, gas, and electric systems with same-day diagnostics and repairs. Annual maintenance plans help prevent winter breakdowns through comprehensive inspections and tune-ups.
Maintenance Plans
Our comprehensive maintenance agreements include bi-annual system inspections, filter replacements, and performance optimizations. Members receive priority scheduling during peak seasons, discounted repairs, and consistent service at standard rates even for after-hours emergencies.
Indoor Air Quality
We improve residential and commercial air quality through advanced filtration systems, humidifiers, and dehumidifiers. Our solutions address allergens, mold, and ventilation issues while maintaining HVAC system efficiency through regular cleaning and equipment upgrades.
People
Mark Flock
President
Third-generation HVAC expert with 30+ years experience. Leads Wisconsin Geothermal Association and oversees technical operations. Specializes in geothermal system design and energy-efficient solutions.
Tony Flock
Partner
Co-owner with expertise in commercial HVAC systems. Manages installations for new construction projects. Focuses on customer relations and business development across west central Wisconsin.
Bill Flock
Partner
Joined in 2002, specializes in residential system upgrades. Coordinates maintenance plans and ensures service quality standards. Handles technical training for new technicians.
Travis Downing
Service Technician
NATE-certified technician with 10+ years experience. Handles complex repairs and emergency calls. Known for thorough diagnostics and clear customer communication during service visits.
Doug Haugh
Installation Specialist
Expert in system installations with 15 years field experience. Specializes in ductless mini-split systems and geothermal loop configurations. Ensures precise equipment setup for optimal performance.
Questions
What HVAC services do you offer in west central Wisconsin?
We provide complete HVAC solutions including air conditioning repair, heating system maintenance, geothermal installations, indoor air quality improvements, and 24-hour emergency service across 20+ Wisconsin communities.
Do you offer emergency HVAC service?
Yes, we provide 24-hour emergency service for urgent heating and cooling needs. Our technicians respond promptly to critical system failures outside regular business hours.
What areas do you service?
We serve Cashton, Sparta, Tomah, La Crosse, Onalaska, West Salem, Viroqua, Bangor, Elroy, Oakdale, Stoddard, Warrens, and 10+ other communities in west central Wisconsin.
Do you offer financing options for HVAC upgrades?
Yes, we provide flexible financing solutions to help customers manage HVAC replacements or upgrades without upfront financial strain while maintaining home comfort.
What maintenance plans are available?
Our HVAC maintenance plans include bi-annual system inspections, filter replacements, and priority service scheduling. Members receive repair discounts and consistent pricing for after-hours service.
Are your technicians certified?
All service technicians are NATE-certified, ensuring technical proficiency across all HVAC systems. We maintain ongoing training for geothermal, ductless, and traditional heating/cooling technologies.