Thermostat and Smart Controls in Greater Madison Area
Upgrade your home comfort with expert thermostat and smart control service. We install and set up leading smart thermostats, integrate apps, and solve wiring issues the right way. Serving the Greater Madison Area, including Madison, Sun Prairie, and Fitchburg. Family owned since 1949 with a 4.9 rating from 1,887 reviews and Nest Elite Pro technicians. Call to schedule or request a quick estimate today.
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View all offersWith programmable comfort controls, customize your home environment while saving up to 20% on your utility bills.
- A state-of-the-art thermostat that not only monitors your home’s temperature but also allows you to precisely control your temperature settings.
- More than just a humidistat, the Carrier Edge Control offers you the ability to manage the humidity of your home, creating a healthier and more comfortable living environment.
- This advanced zoning system provides flexibility by allowing you to maintain different temperatures in different areas of your home allowing you to customize your comfort.
Why Choose Us
Nest Elite Pro experts
Trained to install and support Nest Learning Thermostat
Proven local since 1949
Family owned with Midwestern values and community trust
Top manufacturer partner
Carrier Distinguished Dealer recognition
Priority, reliable service
Goldstar program with 24/7 priority support and discounts
Highly rated team
4.9 rating from 1,887 reviews
What Our Customers Say
professionalism
“He made sure our Nest thermostat was working correctly before leaving.”
speed
“Fast response and quick replacement of my thermostat - thanks Roy!”
quality
“Helping me get the app for the new thermostat set up on my iPhone.”
Your smart thermostat usually fails to join Wi‑Fi due to network settings, weak signal, or low thermostat power. Harker can install, commission, and troubleshoot Nest, Carrier, Honeywell, and Aprilaire controls in Madison and Sun Prairie.
Quick checks:
- Reboot the thermostat and router.
- Verify the correct Wi‑Fi name and password.
- Connect to a 2.4 GHz network if the device requires it.
- Improve signal by moving the router or reducing interference.
- Confirm the C‑wire/power is stable; reconnect and retry network setup.
- Reset network settings on the thermostat and re-add it in the app.
Updated: 2025-11-04 00:00:00
Need help in Madison, WI? Call (608) 255-6902 or book online.
Professional thermostat rewiring costs depend on your system and wiring condition. A Harker technician confirms pricing after an on-site evaluation. Costs change if we add a C-wire for a smart thermostat. Integration with zoning or humidity controls can add time. We service Nest, Aprilaire, Honeywell, and Carrier controls. Installation and commissioning are done in-house. 24/7 service is available in Madison and Sun Prairie.
Updated: 2025-12-09
Need help in Madison, WI? Call (608) 255-6902 or book online.
Start with these quick checks. Most smart thermostat issues resolve without a service call. If problems persist, Harker’s 24/7 technicians service all brands and can reprogram, repair, or replace your control. We’re a Nest Pro and support systems in Madison and Sun Prairie.
Quick checks:
- Confirm HVAC power and reset any tripped breakers.
- Replace thermostat batteries or verify C‑wire power.
- Confirm Wi‑Fi is working and the app shows the device online.
- Set the correct mode, temperature, and schedule.
- Review humidity/zoning if using Carrier Infinity or Edge.
- Restart the thermostat and router.
Updated: 2025-12-18 00:00:00
Need help in Madison, WI? Call (608) 255-6902 or book online.
"He made sure our Nest thermostat was working correctly before leaving." — Claire D.
You can replace a simple like-for-like low-voltage thermostat yourself. For smart upgrades, zoning, heat pumps, or humidity/IAQ add-ons, use a pro to avoid wiring and programming issues. We provide full in-house installation, commissioning, and training, or design/assistance if you prefer to self-install. We’re a Nest Elite Pro and support Honeywell, Carrier, and Aprilaire controls for homes in Madison and Sun Prairie.
- Shut off HVAC power at the breaker.
- Photograph and label each wire.
- Confirm system type and C-wire needs.
- Avoid line-voltage thermostats.
Updated: 2025-11-25 00:00:00
Need help in Brooklyn, WI? Call (608) 255-6902 or book online.
Still have questions?
Have questions or need service? Contact our team today to discuss your needs, request a quote, or schedule an appointment.
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