HVAC Maintenance in the Madison Area
Need reliable HVAC maintenance now? We service furnaces, AC, and whole‑home systems to keep comfort steady and bills low. Serving the Madison Area, including Madison, Sun Prairie, and Middleton. Family‑owned since 1949 and a Carrier Distinguished Dealer, we’re also a Nest Elite Pro. Our techs do the work in‑house and we’re available 24/7. Rated 4.9 from 1,693 reviews. Schedule your spring AC tune up or fall furnace check. Call or book online for a convenient visit.
Each image is a real worksite photo, reflecting the quality and dedication in every project.
Special Offers & Promotions
Join Harker Heating & Cooling's FREE Goldstar Program to save on annual heating and cooling tune-ups and receive 24/7 priority service.
- free membership
- priority service
- discounts on tune-ups
Join Our Goldstar Planned Service Program — FREE Goldstar Program: save money on annual heating and cooling tune-ups; enjoy 24/7 priority service.
- 24/7 priority service
- savings on annual tune-ups
$15 Off with any Add-On maintenance
- non-stackable
Free Goldstar Program membership offering savings on annual tune-ups and 24/7 priority service.
- 24/7 priority service
Why Choose Us
What Our Customers Say
"Fall and Spring inspections and tune ups gives me peace of mind."
"Annual maintenance completed efficiently. He made sure I had no questions."
"Very professional with clear explanations and no upsell."
Answers to Common Questions
View All FAQsWhat Is Included in a Typical AC Tune Up Service?
A typical AC tune-up from Harker Heating & Cooling is a full Clean & Check that covers system controls, airflow, refrigerant health, electrical performance, drainage, and a complete cooling run test. Most issues we find start with restricted airflow or dirty outdoor coils, so we clean, test, and balance the system to restore efficiency and prevent breakdowns. Technicians regularly perform these checks across the Madison area, including homes in Maple Bluff. For urgent failures, 24/7 emergency service is available.
During an AC Clean & Check, your technician will:
- Check thermostat and air filter
- Test all safety controls
- Inspect compressor and contactor
- Check for refrigerant leaks and verify charge
- Wash the outdoor condenser coil
- Inspect blower assembly and measure component amps
- Tighten electrical connections
- Clear the condensate drain
- Lubricate motors and bearings where applicable
- Measure evaporator temperature and run a complete cooling cycle
Change or wash your air filter every 1–3 months to reduce strain and keep your AC reliable.
Updated: 2026-03-25
Need help in Maple Bluff, WI? Call (608) 313-5510 or book online.
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Where We Work
What areas do you serve for hvac maintenance?
We provide HVAC maintenance across the Madison Area, including Madison, Sun Prairie, and Middleton. See the full city list below to confirm coverage.