Licensed, Bonded & Insured · CA Lic. #1003161 Oceanside · Serving all of San Diego County

Thermostat Installation & Replacement

Your thermostat is the control center for your home’s comfort. Whether you want a simple, reliable model or the latest smart technology, Sterling Mechanical installs and replaces thermostats to help you save energy, improve comfort, and control your HVAC system with ease.

100% Satisfaction Guarantee
Licensed, Bonded & Insured
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25+ Years of Experience

Why Your Thermostat Matters

Thermostats control the comfort of your home as well as nearly half of your home’s energy use. A modern thermostat gives you control of both, and features like automatic setbacks can lower your bills without you thinking about it.

Thermostats We Install

Smart Thermostats

Wi-Fi models like the Sensi Pro let you adjust temperature and schedules from your phone. See our smart thermostat page for details.

Programmable Thermostats

Set it once and let it adjust temperatures around your daily routine.

Wireless Multi-Room Systems

Multi-story homes with a single system often have rooms that are too hot or too cold. Wireless remote sensors help balance comfort across the house.

PTAC Controls

Wired and wireless thermostats for PTAC units that move the sensing point away from the unit for a more accurate temperature reading.

Signs It’s Time for a New Thermostat

  • Rooms never seem to reach the set temperature
  • The system short-cycles or runs constantly
  • The display is blank, dim, or unresponsive
  • Your thermostat is more than 10 years old
  • You want to control your system from your phone

Our Installation Process

  • Compatibility Check — We confirm the thermostat works with your equipment and wiring.
  • Professional Installation — Installed, wired, and configured correctly the first time.
  • System Testing — We test heating, cooling, and fan operation before we leave.
  • Walkthrough — We show you how to use it and set up your schedule.

Upgrade Your Thermostat

Call Sterling Mechanical to schedule a thermostat installation or replacement. We’ll set it up, test it with your system, and show you how it works.

Real reviews

What San Diego homeowners say

Quality workmanship, honest pricing, and reliable service. From first-time installs to full system replacements, our customers know they’re in good hands.

“Saw their van in the neighborhood and called them. They turned out to be very professional. Had them replace an older AC unit, on time for everything, did a great job. Easy to deal with. Price was reasonable. Would recommend.”
Verified Yelp ReviewerSan Diego, CA
“Sterling installed central AC in my house. The install was done very quick and very clean. Jason is very friendly and gave us a great price for the job. Now I am enjoying ice cold clean air.”
Jennifer B.Yellow Pages review
“Jason and his team were great. Quick and efficient, kept the cost down as well. Highly recommended.”
Verified ReviewerBuildZoom review

See all our reviews on Yelp

Ready for comfort you can count on?

Free estimates, honest pricing, and 4-hour arrival windows. We’ll call to confirm.

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