Set the routine yourself
A simple schedule
Choose when temperatures change using a schedule you understand.
PRO Electric plus HVAC · Northern Virginia
Programmable &
smart thermostat
installation.
Your home. Your routine.
Controls that fit both. We install, replace, and set up thermostats across Northern Virginia. Get the right match for your equipment, with one licensed team for HVAC and electrical work.
Fairfax · Loudoun · Arlington · Prince William · Falls Church
Virginia contractor license 2705181607
HVAC + electricalOne licensed team
Equipment firstCompatibility checked
Setup with youA routine you understand
Northern VirginiaFour counties + Falls Church
Thermostat installation in Northern Virginia
More control.
Less daily
fiddling.
We help Northern Virginia homeowners choose and install programmable and smart thermostats, replace existing controls, and troubleshoot thermostat problems. The work includes checking compatibility, wiring and power, configuration, and the settings you use every day.
Start with what you want to improve. A predictable schedule, phone access, or easier controls can each be a good reason to upgrade. A blank screen, no heat, or persistent comfort problem calls for an assessment of the cause.
Choose the features you will use
What matters most
at your house?
Explore three priorities for choosing a thermostat. These can overlap: a connected model can follow your schedule and still needs to match your equipment.
Access beyond the wall
Connected convenience
Adjust compatible equipment through an app and useful optional features.
Preserve the system’s abilities
Equipment comes first
Match the control to the heating, cooling, and accessories you already have.
Set the routine yourself
Your routine. Your settings.
A programmable thermostat follows the times and settings you choose. It can be a good fit when your week is predictable and you want straightforward control at the wall.
- Focus
- A repeatable weekly routine
- Its role
- Schedule changes without making each adjustment by hand.
What to check
A programmable label does not guarantee phone access. Check the exact model, schedule options, and equipment compatibility.
A useful question for the estimate: Can I easily change the schedule and use a temporary hold?
Bring the model. We’ll check the fit.
Brand is a starting point.Compatibility is the deciding point.
Already considering Nest, ecobee, Honeywell Home, Sensi, or another brand? Share the exact model. We’ll review the equipment, features, and installation before you commit.
Buying guidance: ENERGY STAR smart thermostats ↗ · Example manufacturer compatibility requirements ↗
The heat pump detail that matters
Plan the setback.
Plan the recovery.
On a heat pump, a large temperature increase after a heating setback can bring on electric backup heat. That can reduce or erase the savings you expected. The thermostat and its setup need to account for the equipment.
Review the whole heating sequence. We check the heat pump, backup source, supported stages, and control settings. A dual-fuel system also needs the right coordination between its heat pump and furnace.
Have a conventional furnace? A suitable schedule can reduce unnecessary heating, but the temperature changes and recovery still need to suit your home. There is no single schedule that is right for everyone.
AUX is information, not a diagnosis. Supplemental heat can be part of normal operation. Tell us if it is frequent or unexpected. Do not disable backup heat or change installer settings just to make the indicator disappear.
Learn more: Carrier on auxiliary heat and setbacks ↗ · DOE research on controls and equipment ↗
Tap your routine. Start the conversation.
Make the week
look like your week.
Mark when your household is home, away, or asleep. Add what you know about the equipment, then keep a planning note for the installation conversation.
Click any block to change it:
Not set → Home → Away → Asleep → Not set.
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Start with your routine, or load the clearly labeled example.
These are broad parts of your day, not exact times or temperature settings. Mark the household’s routine, including people who stay home. We’ll discuss the details with you.
Your thermostat conversation
Example routine: edit or confirm before sharing.
Start by identifying the system.
We can check the equipment and existing control before choosing a thermostat. You do not need to remove a cover or identify wiring.
Your week is blank. Mark any blocks that are useful to share.
Questions to bring
- Share the existing thermostat model if you know it.
- Tell us what you want to change about daily control.
- Confirm equipment compatibility before buying a replacement.
Compare simple scheduling and connected options after compatibility is confirmed.
Your choices stay on this page. This guide does not control your equipment, recommend temperatures, calculate savings, or book a visit. Reloading the page clears the planner.
From compatibility to everyday use
Installed correctly.
Set up with you.
We bring HVAC and electrical work into one scope. The proposal should identify the thermostat, any wiring or power work, configuration, setup, and applicable parts and labor coverage.
Not sure about the C wire? You don’t have to investigate it yourself. We can review existing power and wiring and discuss a suitable option for the selected model.
Confirm compatibility
Check the exact equipment, control voltage, stages, and supported accessories before selecting a replacement.
Plan the power
Assess existing wiring, a common wire when needed, and any manufacturer-approved power option.
Configure the system
Match heat-pump, furnace, dual-fuel, fan, and accessory settings to the actual installation.
Review the location
Consider drafts, sunlight, nearby heat, and representative room temperature when assessing placement.
Set up connected features
Review Wi-Fi, the owner’s account, app access, optional sensors, and what happens when connectivity is lost.
Test and explain
Check applicable heating, cooling, and controls, then walk through the schedule, hold, resume, and owner instructions.
Keep the wiring review with the installation.
Low-voltage, line-voltage, and proprietary controls are not interchangeable. Leave equipment and wiring covers closed. Share the model and symptoms you already know.
Power requirements: Manufacturer guidance on the common wire ↗
The best feature is knowing how to use it
Comfortable with
the controls.
We walk through the functions that matter to your household. You should know how to make a change and how to return to the routine you chose.
Schedule, hold, resume.
Review normal settings, temporary changes, and how to get back to the schedule. Exact options vary by model.
Your app. Your access.
Use the homeowner’s account and review supported access. Keep passwords private; do not send them through the estimate form.
Know what needs a call.
Discuss unexpected messages, lost connectivity, and equipment concerns. Keep the model and owner instructions easy to find.
Plan the full installed scope.
Veteran discount programFinancing is available on request. Ask about veteran and military discount eligibility and current terms.
One licensed team. A clear next step.
From the first question
to everyday comfort.
- 01
Tell us the goal.
Share what you have, what you want to change, and any thermostat model you are considering.
- 02
Confirm the fit.
We review compatibility, power, controls, and any related equipment concern.
- 03
Approve the scope.
Review the device, installation, additional work, setup, and applicable coverage before proceeding.
- 04
Get comfortable with it.
We review the everyday controls and schedule so you know how to use the finished installation.
Your Northern Virginia neighbors
Hear from our customers.
Reviews of PRO Electric plus HVAC from homeowners and businesses in our community.
Bring us your routine
Let’s make the
controls work for you.
Tell us what equipment you have and what you want to change. Start with a free thermostat installation estimate.
Request a thermostat estimate
Open the form in a new tab ↗Share your service address and project goal. A request does not confirm an appointment. If the current system is not working, describe that when arranging the visit.
For a new thermostat, choose Installation → AC → Thermostat. Keep your planning note for the conversation; if an additional-information field appears, you can paste it there.
The installation estimate is free. Diagnostic or repair visits may have separate charges. More ways to contact PRO.
Clear answers before you choose
Thermostat
questions,
answered.
Compatibility, heat pumps, wiring, everyday use, and what to expect from installation.
Ask PRO: 703-225-8222What does a programmable thermostat do?
It changes the temperature setting according to a schedule you choose. We can help set up that schedule around your routine and the heating and cooling equipment it controls.
What is the difference between a programmable and a smart thermostat?
A programmable thermostat follows a schedule. A smart thermostat adds connected features such as app access. Learning, occupancy sensing, room sensors, and voice control depend on the model; they are not included in every smart thermostat.
Will a new thermostat lower my energy bills?
It may help reduce unnecessary heating and cooling, but savings depend on your current settings, equipment, home, climate, and use. A new thermostat does not guarantee a lower bill or a specific payback period.
Can I use a programmable thermostat with a heat pump?
Yes, when the thermostat supports the exact heat pump and any backup heat. The setup matters as much as the schedule. Large heating setbacks can trigger electric backup during recovery, so discuss the equipment and recovery strategy before choosing settings.
Does AUX mean my thermostat is broken?
Not necessarily. AUX can indicate supplemental heat that the system needs during certain conditions. Frequent or unexpected AUX operation deserves an assessment. The display alone does not identify a fault or prove which kind of backup heat you have.
Do smart thermostats need a C wire?
Many need a common wire or another manufacturer-approved power arrangement. Requirements vary by model and system. We check power and wiring before installation; a missing C wire does not automatically rule out a smart thermostat.
Will any smart thermostat work with my HVAC system?
No. Compatibility depends on the exact thermostat and equipment, including voltage, stages, heat-pump or dual-fuel operation, zoning, and accessories. Some communicating and ductless systems need a dedicated control or approved interface.
Can I control my thermostat from my phone?
A compatible connected model can provide app control with the required network and account setup. We review those requirements and help explain access. Do not send account passwords through the estimate form.
What happens if my Wi-Fi goes out?
ENERGY STAR certified smart thermostats must retain basic thermostat operation without a connection to the service provider. Remote access and other connected features may be unavailable. Check the exact model’s offline behavior; an internet outage and an equipment power outage are different issues.
Will a new thermostat fix hot and cold rooms?
It may help with sensing or control, but it cannot correct every comfort problem. Airflow, ducts, insulation, equipment, or zoning may need attention. A remote room sensor is not the same as adding an independently controlled HVAC zone.
Can you connect a thermostat to a whole-house humidifier?
We can assess that option. The thermostat, humidifier, wiring, and controls must support the intended setup. Include the accessory model in the conversation so it is part of the installation scope.
Can you install a thermostat I already bought?
Share the exact model and your equipment details before the visit. We can review compatibility and discuss installation, any additional work, and the applicable parts and labor coverage.
Do you troubleshoot and replace existing thermostats?
Yes. We provide thermostat troubleshooting, replacement, wiring, setup, and configuration in Northern Virginia. A blank screen, lost connection, or no-heat complaint can also involve equipment or power, so we assess the cause before recommending a replacement.
How much does thermostat installation cost?
The scope depends on the thermostat, existing wiring and power, equipment compatibility, accessories, and setup work. Request a free installation estimate. Diagnostic or repair visits may have separate charges, which you can discuss when arranging service.
Where do you provide thermostat service?
We serve Fairfax, Loudoun, Arlington, and Prince William counties, including Falls Church. Share your address and project details to discuss availability. Call PRO Electric plus HVAC at 703-225-8222.
Your Northern Virginia team
Local service.
A setup made for your home.
We serve Fairfax, Loudoun, Arlington, and Prince William counties, including Falls Church. Share your address, equipment details, and project goal to discuss availability.
A thermostat that fits.
A routine that makes sense.
Let’s talk about your equipment and the way you live.