Since 2000, Mainstream Electric, Heating, Cooling & Plumbing has provided expert thermostat replacement in Spokane, offering smart upgrades and precise repairs backed by 25 years of trusted, neighborly service.
If your thermostat isn’t responding, cycling properly, or keeping the right temperature, it’s not just frustrating — it could be costing you in comfort and energy bills. At Mainstream, we specialize in thermostat repair and replacement services that restore control and efficiency to your home’s climate systems. Whether it’s a simple sensor fix or a full upgrade to a smart thermostat, our licensed HVAC professionals get the job done quickly and correctly.
We’re available 24-hours for emergency repairs, and for homeowners who prefer a proactive approach, our Care Club offers year-round tune-ups, priority scheduling, and discounted service. It’s just one more way Mainstream delivers lasting comfort — with the kind of personalized service only a neighbor can offer.
Welcome to Mainstream Home Services – your one-stop solution for all your electrical, heating, cooling, and plumbing needs. Here’s why you should trust us with your home services:
We respect your time and prioritize efficient communication. We ensure minimal wait times for our technicians, allowing you to spend more time enjoying your home. Expect a call before our technician arrives, giving you the flexibility to plan your day accordingly.
No surprises, no hidden costs. Our upfront pricing provides competitive quotes tailored to your specific service requirements. You'll receive a detailed breakdown of the work involved, ensuring transparency and total peace of mind.
Our friendly, skilled technicians are experts in electrical, heating, cooling, and plumbing services. With state-of-the-art tools and expertise, we guarantee precise, code-compliant work. Your home will be left spotless, reflecting our commitment to cleanliness and professionalism.
We proudly service the following cities and neighborhoods in Spokane & Northern Idaho:
Not seeing your area? Give us a call at 509-237-6483
Explore our comprehensive indoor air quality services designed to address every aspect of your home’s atmosphere. Click the links below for more details on our specialized offerings:
Absolutely. Whether you’re looking for a basic replacement or a smart thermostat with advanced features, Mainstream’s licensed HVAC pros will recommend the best option based on your system, lifestyle, and budget.
Most thermostat installations take less than an hour. Mainstream’s team ensures a safe, accurate setup and will walk you through how to use your new thermostat before we leave.
Yes! Mainstream installs all major thermostat brands and can upgrade your system to a digital or smart model—even if your current setup is outdated. We’ll make sure it’s compatible with your HVAC system.
Older homes may have outdated wiring or non-standard configurations, but Mainstream’s technicians are experienced in troubleshooting and adapting solutions to ensure safe, reliable thermostat upgrades in any home.
Upgrading to a smart or programmable thermostat gives you better control over indoor temperatures, lowers energy bills, and allows remote adjustments from your phone. Mainstream makes installation easy—helping you get the most from your HVAC system year-round.
If your home never seems to feel quite right—too hot, too cold, or constantly fluctuating—the problem may not be your furnace or air conditioner. In many cases, your thermostat is the true culprit. At Mainstream Electric, Heating, Cooling & Plumbing, we specialize in thermostat replacement, installation, and repair services that help homeowners across Spokane and Northern Idaho take control of their comfort with precision.
Whether you’re dealing with an unresponsive unit, inaccurate readings, or simply ready to upgrade to a smart thermostat, our licensed HVAC professionals are here to help—quickly, honestly, and with the care you’d expect from a neighbor.
Your thermostat is the brain behind your HVAC system. It tells your furnace when to fire up, your AC when to cool down, and your home when it’s time to rest. When it malfunctions, even high-end systems can fall short.
Common thermostat issues include:
Inconsistent or incorrect temperature readings
Constant cycling or failure to turn on
Unresponsive touch screens or faulty buttons
Unexpected energy spikes
Outdated models with limited programming options
If you’re noticing these signs—or your thermostat is over 10 years old—it might be time for a thermostat replacement.
At Mainstream, we’re not just here to fix problems—we’re here to future-proof your comfort. That’s why we offer expert installation of smart thermostats, including models that integrate seamlessly with voice assistants, mobile apps, and learning algorithms. These thermostats don’t just control temperature—they adapt to your schedule, help you save energy, and can even provide insights on system performance.
Looking for a thermostat that works with your new heat pump or zoned HVAC system? We’ll match the right technology to your setup, install it with precision, and walk you through how to use it with confidence.
Not every thermostat issue requires a full replacement. If your unit still has life left in it, we’ll get to the root of the problem and repair it quickly—whether it’s a wiring issue, a loose connection, a blown fuse, or a malfunctioning sensor.
We also offer heating system diagnostics and cooling system tune-ups, because sometimes the problem lies deeper within your system. When you call Mainstream, you get thorough troubleshooting and clear explanations—not guesswork or upsells.
Like any part of your HVAC system, thermostats benefit from regular checkups—especially in homes with pets, dust, or electrical fluctuations. During seasonal maintenance visits, our HVAC techs test thermostat accuracy, clean internal components, check wiring, and calibrate temperature settings to ensure everything is running at its best.
Want a simple way to stay on top of this? Our Care Club includes thermostat inspections as part of regular tune-ups. Club members also get priority service, discounts on repairs, and the peace of mind that their home is always in expert hands.
A failed thermostat during a summer heatwave or winter cold snap can make your home unbearable. That’s why Mainstream offers 24/7 emergency HVAC repair across Spokane, Coeur d’Alene, Post Falls, and surrounding areas. Whether your system is locked up or running nonstop, we’ll arrive quickly, diagnose the issue, and get your comfort back on track—day or night.
We may be known for thermostat replacements, but we’re proud to be your one-stop shop for total home comfort solutions. Our team also offers:
Heat pump services for year-round efficiency
Electrical services to support smart home upgrades
Indoor air quality improvements like humidifiers, air purifiers, and filters
Whether you’re replacing an outdated thermostat or tackling a whole-home HVAC upgrade, Mainstream brings the knowledge, care, and community spirit you deserve.
At Mainstream, we treat every home like it’s our own—and that starts with listening. We’ll take the time to understand your needs, recommend the right thermostat solution, and get it installed or repaired with precision. From energy savings to year-round comfort, the right thermostat makes all the difference.
Schedule your thermostat replacement today and see why Spokane homeowners have trusted Mainstream since 2000.
Ready to elevate your home’s comfort? Discover a variety of services beyond heating repairs that cater to your every need. Explore the full range by clicking the links below:
Mainstream is Spokane’s #1 plumbing, electrical, heating, and air conditioning home repair specialists.
Call today to schedule your service!
