The Smart Thermostat Experts in the Central Valley

//Set It & Forget It…Upgrade Your Thermostat Today

Still watching the mercury rise on your old-school thermostat? It’s time to modernize your HVAC systems with smart thermostats that improve the energy-efficiency of your home heating and cooling.

We install the latest thermostat devices and technologies. Your home comfort systems connect to your smartphone and know what temperature you need to get comfortable before you even walk in the door.

Our Total Satisfaction Promise

Our Total Satisfaction Promise

We never consider our work a job well done until we have your stamp of approval! And we’ll always leave your home cleaner than we found it.

The Cencal Craftsmanship Guarantee

The Cencal Craftsmanship Guarantee

Enjoy peace of mind with a LIFETIME WARRANTY on selective parts and components. If anything goes wrong with your thermostat replacement in the first year, we’ll fix it—for free!

No-Surprise Pricing

No-Surprise Pricing

Our specialists are experts when it comes to quoting the job. You’ll be given a total price for a completed thermostat service before we start the job. There’s never a payment surprise when you choose Cencal.

Our Family, Your Neighbor

Our Family, Your Neighbor

Cencal Mechanical remains a family-owned and operated business with humble beginnings in Modesto, CA. We’re proud to have grown across the Central Valley, but our community values have never wavered.

In Modesto and throughout the Central Valley, our trucks are stocked and ready to help the communities we love. We’re the reliable hot water experts who care in California.

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//The Cencal Mechanical Legacy

Why do we continue to grow and help more homeowners across California? Because we’re obsessed with HVAC services and care about every customer.

Cencal Mechanical has installed thousands of furnaces, heat pumps, air conditioners, and thermostats. Our HVAC specialists are trained on all brands and manufacturers, so you can always call Cencal with confidence!

Open 7 Days a Week

Certified Technicians

Fully Stocked Trucks

//HVAC Thermostat FAQs

You can always contact our team with questions about thermostat upgrades, repairs, or replacements. Here are some questions our customers often ask!

Is a Smart Thermostat Worth It?

Replacing your old mechanical thermostat is like upgrading from a rotary dial to a smartphone. Sure, your rotary dial might still work but there’s so much more you can do with a smartphone!

Smart thermostats work on a learned behavior system. This means that your home’s heating system recognizes the times of the day and week when you’re most in-demand of heat. Smart thermostats can anticipate your arrival and many models can integrate with your smartphone for an even more precise experience.

Why does this matter? Because it saves you money by reducing the amount of wasted energy. Instead of your living space being heated constantly while you’re away, your home learns to manage heat cycles and only burns fuel when it’s beneficial.

Should I Turn the Heat Off When I’m Away?

It’s never a good idea to turn your home’s heating completely off. But lowering the temperature when you know you’ll be away is the right thing to do. Consider these 2 heating principles:

  • The warmer your home is relative to the outside temperature, the more heat your home will lose.
  • The colder your home is, the longer it will take to heat to a comfortable temperature.

If your living space is too cold, it can lead to pipes freezing and other complications. But dropping the temperature when you’re not at home is a simple way to improve your heating system’s efficiency. If you normally keep your home at 70 degrees, try dropping the temperature to about 58 degrees while you’re away.

One way to make this constant calibration easier? Install a smart thermostat! You can schedule your work routine or other times you’re away from home so that your heating system adjusts automatically.

How Do I Know My Thermostat is Broken?

Even those old full metal mechanical thermostats eventually break down. When your heating or cooling cuts out, sometimes it’s difficult to pinpoint the problem. But here are some signs that your thermostat might be the culprit for a heating system that’s not working:

  • Your thermostat is not turning on heating or cooling.
  • Your thermostat is showing the wrong temperature.
  • Your thermostat shows inconsistent temperatures.
  • Your thermostat is showing a blank or faint screen.
  • Your thermostat is causing short-cycling or excessively turning on and off.

Whether you have an old-school mercury thermostat, a newer digital unit, or an advanced smart system, our service specialists at Cencal can assess the issue and get your thermostat working right. Your thermostat is always a good place to start when your heating or cooling system isn’t working right.

Should I Have Multiple Thermostats?

Depending on the size and layout of your home, it can be beneficial to have more than one thermostat. Your basement, for instance, might be a part of your home that you don’t spend a lot of time in. You would be wasting energy to keep this area the same temperature as your bedroom.

One of the great benefits of installing smart thermostats is that they can communicate with each other and coordinate which parts of your home should be  the warmest based on your daily activity. In the winter for example, your bedroom would be warmer at night and your living room would be warmer during weekend days.

Our heating experts at Cencal will perform a detailed walkthrough of your home and help determine what type of thermostat layout will help you get the most out of your HVAC system.

//We’d Love to Hear From You!

Our team is at the ready 7 days a week. So don’t hesitate to reach us for inquiries about AC, home heating, or anything else HVAC related.

Fill out the form, and one of our specialists will be in touch soon to get you on your way to cool, comfortable living.

Cencal Mechanical Heating & Air Inc. Service Area

//Get In Touch with Cencal Mechanical Heating & Air Inc.

You can find our headquarters in Modesto, CA, just east of the Golden State Hwy at Woodland Ave.

1254 Lone Palm Ave
Modesto, CA 95351

(209) 720-4443


We specialize in delivering premium HVAC services to homeowners across the Central Valley.

When it comes to staying cool, keeping warm, and improving your indoor air quality, Cencal is your first call. Even if we didn’t install your thermostat, don’t hesitate to call us!

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//Become a Cencal Gold Member & Save

The Cencal Gold Membership gives you peace of mind knowing that your home is protected all year round. Members enjoy bi-annual maintenance on their home comfort HVAC systems.

Join the most comprehensive Membership coverage in the industry. Members are insured against unexpected, costly repairs, and your home will never be without a functioning air conditioning system.

Enjoy the Cencal Gold Member Benefits

  • FREE Bi-Annual HVAC Tune-Up
  • 10% Off Parts for All Service Calls
  • NEVER Pay Diagnostic Fees
  • NEVER Pay for Overtime Labor
  • Front-of-the-Line Service for All Repairs & Maintenance
Become a Member Today
Memberships with Cencal Mechanical Heating & Air Inc.

Cencal Mechanical is ready to help you get more out of your home heating with a smart thermostat installation.

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//What Our Customers Say About Cencal

“These guys are the best! Always professional and kind!! They are great at explaining what needs to be done if anything. We have had them coming to service our A/C and heater for 5 years! Would not go anywhere else! The ladies in the office are professional and kind as well!!”

Lillis H.

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