Upgrading your thermostat is one of the easiest ways to improve comfort, increase efficiency, and gain more control over your heating and cooling system.
Cronus Service provides professional thermostat installation, replacement, and smart thermostat upgrades — with same-day installation in most cases.
We install and recommend leading thermostat brands, including Amazon Smart Thermostat, ecobee, Google Nest, and Honeywell.

What We Offer and Deliver
Professional installation of smart, programmable, or advanced thermostats
Wiring inspection and compatibility check with existing HVAC equipment
Wi-Fi setup, app configuration, and smart home integration
Calibration of temperature sensors and system communication
Removal and safe disposal of old thermostat
Final testing in both heating and cooling modes
Top Thermostat Brands
Below are the most common and reliable thermostat brands used in Sacramento homes. Each brand works well with furnaces, heat pumps, mini splits, zoning systems, and high-efficiency HVAC equipment.
Pros:
• Most affordable smart thermostat option
• Clean, simple interface
• Excellent Alexa integration
• Works well for standard heating/cooling systems
• Ideal for rental homes or starter smart systems
Cons:
− Limited advanced features
− No room sensors
− Requires Alexa account for full functionality
Pros:
• Industry-leading room sensors for accurate temperature control
• Best thermostat for complex HVAC systems (heat pumps, multi-stage, zoning)
• Works with Apple HomeKit, Alexa, Google, SmartThings
• Excellent scheduling, automation, and energy-tracking features
Cons:
− Requires stable Wi-Fi
− Slight learning curve for new users
Pros:
• Sleek design, modern interface
• Learns your habits and adjusts automatically
• Easy mobile app setup
• Great for Google Home-based smart homes
Cons:
− Not ideal for complicated zoning
− Some systems require C-wire adapter
Pros:
• Extremely reliable and durable hardware
• Excellent compatibility with older HVAC systems
• Many model options: programmable, digital, and smart
• Perfect for rental properties or simple retrofit upgrades
Cons:
− Smart features are basic compared to ecobee/Nest
− Interface varies depending on model
(For customers who want simple, dependable, no-app thermostats)
Pros:
• Very affordable and extremely reliable
• Simple to use — no Wi-Fi, no apps, no learning algorithms
• Excellent for rental properties, ADUs, or customers who prefer basic controls
• Works with nearly all standard HVAC systems
Cons:
− No smart features or remote access
− No advanced scheduling
− Not ideal for zoning or multi-stage systems
(For communicating HVAC systems: high-end, modulating, or variable-speed equipment)
Pros:
• Required for Daikin FIT, Daikin VRV/VRF, Lennox SLP99V, Lennox SL28XCV, and other communicating systems
• Provides full control of modulation, staging, and system logic
• Maximizes efficiency and comfort on variable-speed equipment
• Advanced diagnostics — helps identify problems early
• Ensures compatibility with communicating furnaces and heat pumps
Cons:
− Not interchangeable with generic thermostats
− More expensive than standard models
− Must be installed and configured professionally
− Not compatible with all traditional furnaces/AC units
Consultation
Send us a quick request — we’ll get back to you within 15 minutes.
You’ll receive a detailed cost estimate
We’ll help you choose the right equipment
We’ll answer all your questions
(!) No pressure. No hidden conditions. Just clear, professional service.
Stages
Browse by category and find the service you need:
Stage 1
We evaluate your furnace, heat pump, mini split, or zoning system to ensure proper thermostat compatibility.
Book request
Stage 2
We disconnect and remove your old thermostat, securing all wiring.

Stage 3
We mount the new thermostat, connect control wiring, and verify HVAC communication.

Stage 4
We set up mobile app access, scheduling, voice control, and automation features.

Stage 5
We test heating, cooling, and fan modes, then show you how to use your thermostat features.

Tip
If you’re facing one or more of the following issues, installing or upgrading your thermostat may be the most cost-effective solution.
.jpg)
A modern thermostat improves accuracy and zone control.

Upgrading adds efficiency and smart features.

Faulty sensors or wiring cause rapid cycling.

Smart thermostats reduce wasted heating and cooling.

Pro Tip:
Upgrading to a modern thermostat protects your HVAC system, reduces wear, and improves comfort. A smart thermostat also identifies problems early through runtime monitoring and alerts.
Thermostat Service Description
Sacramento’s climate varies throughout the year, making thermostat accuracy essential. Smart thermostats automatically adjust temperature based on schedules, weather, and occupancy patterns. They also integrate with smartphones, home assistants, and zoning systems to improve comfort and reduce energy waste.
A modern thermostat helps:
• Improve indoor comfort
• Reduce heating & cooling costs
• Extend equipment lifespan
• Provide alerts & diagnostics
• Support multi-zone heating/cooling
• HVAC system turns on/off repeatedly
• Thermostat shows incorrect temperatures
• Slow heating/cooling response
• Blank screens or unresponsive buttons
• Your home still uses an old analog or basic digital thermostat
• Temperature differences across rooms
These problems often signal sensor failure or wiring issues.
• No power or blank display
• Wi-Fi connectivity issues
• Thermostat not communicating with furnace or heat pump
• Incorrect or missing C-wire
• Inaccurate temperature readings
• Short cycling or rapid cycling
• Broken buttons or touchscreen failures
• Smart thermostat compatibility issues
Smart thermostats automatically adjust to Sacramento’s warm afternoons and cool evenings. They reduce gas and electricity usage while maintaining stable comfort. Upgrading is especially beneficial if you use:
• Heat pumps
• Multi-stage HVAC systems
• Zoned heating/cooling
• Ductless mini splits
• VRF/VRV systems
Choose repair when:
• A wire is loose
• Sensor replacement resolves the issue
• The thermostat is fairly new
Choose upgrade when:
• Thermostat is outdated or inaccurate
• You want remote access and scheduling
• HVAC system has been modernized
• Buttons/display no longer work
• You want to reduce energy usage
We ensure correct wiring, voltage, and control pairing with your HVAC system. We also calibrate sensors and optimize thermostat settings. Most installations are completed the same day in most cases.
We ensure compatibility with furnaces, heat pumps, multi-stage systems, VRF/VRV, ductless systems, and zoning configurations.
Whether you want full smart automation or improved temperature accuracy, Cronus Service installs thermostats that improve comfort, efficiency, and HVAC performance.
Serving Sacramento, Roseville, Rocklin, Lincoln, Granite Bay, Folsom, El Dorado Hills, Elk Grove, and nearby areas.
Consultation
Send us a quick request — we’ll get back to you within 15 minutes.
You’ll receive a detailed cost estimate
We’ll help you choose the right equipment
We’ll answer all your questions
(!) No pressure. No hidden conditions. Just clear, professional service.
Top rated
Certified and recognized as a leader in quality and reliability.







Gallery
Real installations. Real homes. Real results
.jpg)

.jpg)


.jpg)

.jpg)
Reviews


FAQ
It depends on your HVAC system and preference. Amazon is great for budget-friendly smart control, ecobee is the best for zoning and heat pumps, Nest is excellent for Google Home users, and Honeywell is a reliable traditional choice. We evaluate your system and recommend the best option based on compatibility, features, and performance.
Yes — in most cases. Standard installations take 30–60 minutes. More complex systems may require additional wiring, especially if a C-wire is needed, but we stock adapters and wiring tools to complete most jobs on the spot.
Not all. Heat pumps, multi-stage HVAC systems, and zoning setups require compatible thermostats with specific wiring configurations. We check your equipment before installation to ensure the thermostat communicates properly and prevents system damage.
This may be caused by a sensor failure, incorrect placement (near windows or vents), internal dust buildup, or outdated calibration. Smart thermostats often solve these issues with better sensors and learning algorithms.
Yes. Short cycling, poor temperature control, and unnecessary strain often come from faulty thermostats. Replacing an outdated thermostat can restore normal system operation and reduce energy waste.
Absolutely. Smart thermostats reduce energy consumption, improve comfort, extend HVAC lifespan, and provide alerts for problems. They pay for themselves through energy savings and convenience.
Contact US
Licensed, insured, and fully certified
We work with equipment from all major brands
In-house team — no subcontractors, no middlemen
Transparent estimates and fixed pricing before work begins
Keeping the best prices in the area, apply rebates
Ongoing service, repairs, and support after installation
Consultation
Send us a quick request — we’ll get back to you within 15 minutes.
You’ll receive a detailed cost estimate
We’ll help you choose the right equipment
We’ll answer all your questions
(!) No pressure. No hidden conditions. Just clear, professional service.
Our manager will contact you to advise you and answer all your questions.