Pro Select thermostats offer reliable temperature control, stemming from the Greek prefix ‘pro,’ signifying advanced functionality. These devices cater to both professional and everyday users.
What is a Pro Select Thermostat?
Pro Select thermostats represent a range of heating and cooling control systems designed for residential and light commercial applications. Rooted in the meaning of ‘pro’ – signifying professional-grade or beforehand – these thermostats aim for efficient and precise temperature management. They are often “dual power” units, functioning with either 24V AC power or AA alkaline batteries.
These thermostats can operate in both automatic and manual modes, adapting to user preferences. They are compatible with various heating and cooling systems, offering features like scheduling and temperature overrides. The ‘pro’ designation suggests a focus on reliability and user-friendly operation.
Key Features and Benefits
Pro Select thermostats boast several key advantages; Dual power operation – utilizing both 24V AC and batteries – ensures consistent functionality even during power outages. Programmable schedules allow for customized temperature settings based on daily routines, promoting energy savings. Features like automatic and manual modes provide flexible control.
Benefits include improved comfort, reduced energy consumption, and ease of use. The thermostats support both heating and cooling systems, offering comprehensive climate control. Their design prioritizes reliability and straightforward operation, making them suitable for a wide range of users.
Understanding Your Pro Select Thermostat Model
Pro Select offers diverse thermostat models, like the PSTSP21AWH. Identifying your specific model number is crucial for accessing the correct manual and support resources.
Identifying Your Specific Model Number
Locating your Pro Select thermostat’s model number is the first step towards accessing tailored support and documentation. This unique identifier ensures you download the correct installation instructions and user manual. Typically, the model number is found on a sticker located either on the back of the thermostat unit itself, or on the mounting plate behind the faceplate.
Common Pro Select models include the PSTSP21AWH and PSTSL21P52. Carefully examine these areas, noting any alphanumeric codes. Having this number readily available streamlines troubleshooting and ensures compatibility when seeking assistance or replacement parts. Refer to the Pro Select website if you encounter difficulties.
Thermostat Components Overview
A Pro Select thermostat generally comprises several key components. These include the faceplate, which houses the display and buttons for user interaction. Beneath this lies the mounting plate, securely attached to the wall. Internal wiring terminals connect to your HVAC system’s wires, facilitating heating and cooling control.
Many Pro Select models are ‘dual power’ thermostats, accommodating both 24V AC power and AA alkaline batteries. The display shows the current temperature and setpoint, while buttons allow for adjustments. Understanding these components is crucial for installation, operation, and basic maintenance.

Initial Setup and Installation
Proper installation ensures optimal performance. Carefully review the provided instructions, prioritizing safety precautions before disconnecting your old thermostat and wiring the Pro Select unit.
Safety Precautions Before Installation
Prioritize safety during installation! Always disconnect power to your heating and cooling system at the breaker box before beginning any wiring. Failure to do so could result in electrical shock or damage to equipment. Verify the system is off using a non-contact voltage tester.
If you are uncomfortable working with electrical wiring, consult a qualified HVAC technician. Incorrect wiring can lead to system malfunction or create a fire hazard. Carefully label existing wires before disconnecting them to ensure proper reconnection.
The Pro Select thermostat operates on 24V AC or batteries; understand your model’s power source. Always follow local electrical codes and regulations during installation.
Removing Your Old Thermostat
Begin by turning off power to your HVAC system at the breaker. Carefully remove the cover of your existing thermostat, often by gently prying it off or releasing clips. Before disconnecting any wires, take a clear photograph of the wiring configuration – this is crucial for reference!
Label each wire with its corresponding terminal designation (e.g., R, W, G, Y). Loosen the screws holding the wires in place and gently disconnect them.
Remove the old thermostat baseplate from the wall. Ensure the wall surface is clean and smooth for mounting the new Pro Select thermostat.
Wiring the Pro Select Thermostat
Refer to the photograph taken during old thermostat removal and the Pro Select wiring diagram. Connect each labeled wire to the corresponding terminal on the new thermostat baseplate. Ensure wires are securely fastened – loose connections can cause malfunctions.
The Pro Select thermostat is a dual power unit, accepting either 24V AC or two AA alkaline batteries. If using batteries, insert them now, observing correct polarity.
Double-check all connections before mounting the thermostat baseplate to the wall.
Understanding Wire Colors and Terminals
Common wire colors include Red (24V power), White (heat), Yellow (cooling), Green (fan), and Blue (common). However, color coding isn’t universal – always verify with your old thermostat’s wiring. Terminals are labeled accordingly (R, W, Y, G, C).
The ‘C’ wire provides 24V common power; it’s crucial for consistent operation, especially with smart thermostats. If you lack a ‘C’ wire, consult a professional for assistance. Incorrect wiring can damage your HVAC system.
24V AC Power vs. Battery Operation
Pro Select thermostats are often dual power, meaning they can operate on 24V AC power from your HVAC system or two AA alkaline batteries. 24V AC provides consistent power and is the preferred method. Battery operation serves as a backup during power outages or when a ‘C’ wire isn’t available.
Using batteries exclusively may shorten their lifespan. The thermostat automatically switches to battery power if it loses connection to the 24V AC source, ensuring continued temperature regulation.

Basic Operation: Setting the Temperature
Pro Select thermostats allow manual temperature adjustments using intuitive buttons and a clear display, providing straightforward control over your home’s heating and cooling.
Manual Temperature Adjustment
Pro Select thermostats prioritize user-friendly temperature control. To manually adjust, locate the “Up” and “Down” buttons on the thermostat’s faceplate. Pressing “Up” increases the set temperature, while “Down” decreases it. The current setpoint is prominently displayed on the screen.
Each press typically adjusts the temperature by one degree Fahrenheit (or Celsius, depending on your settings). Observe the display to confirm your desired temperature is reached. The system will then work to achieve and maintain this manually selected temperature, overriding any programmed schedule until a new setpoint is chosen or the schedule resumes.
Using the Display and Buttons
Pro Select thermostats feature an intuitive interface. The display clearly shows the current room temperature, the set temperature, and the operating mode (Heat, Cool, Auto, Off). Buttons are typically labeled with universal icons – up/down arrows for temperature adjustment, a ‘Mode’ button to cycle through operating modes, and a ‘Fan’ button for fan control.
Pressing ‘Mode’ allows selection between heating, cooling, automatic switching, or complete system shutdown. The ‘Fan’ button toggles between ‘Auto’ (fan runs only during heating/cooling) and ‘On’ (fan runs continuously). Familiarize yourself with these controls for optimal operation and comfort.

Programming Your Pro Select Thermostat
Pro Select thermostats allow customized schedules for energy savings and comfort. Program different settings for weekdays versus weekends, creating tailored temperature profiles.
Setting Up a Schedule
Pro Select thermostats simplify temperature management through programmable schedules. Access the scheduling function via the thermostat’s interface, typically involving buttons or a digital display. Define specific time periods throughout the day – such as ‘Wake,’ ‘Leave,’ ‘Return,’ and ‘Sleep’ – and assign desired temperatures to each. The thermostat automatically adjusts based on this programmed timeline, optimizing comfort and reducing energy consumption. Remember to consider your daily routines when establishing these settings. You can often create multiple schedules for different days of the week, accommodating varying lifestyles.
Creating Different Programs for Weekdays and Weekends
Pro Select thermostats allow distinct programming for weekdays versus weekends, recognizing differing schedules. Within the scheduling menu, locate options to create separate programs – often labeled ‘Weekday’ and ‘Weekend.’ Customize temperature settings for each time period (Wake, Leave, Return, Sleep) independently within each program. This ensures optimal comfort and energy savings, aligning with typical lifestyle variations. For example, weekend programs might feature later ‘Wake’ times and different ‘Return’ temperatures. Save each program to activate the tailored heating and cooling schedule for those specific days.
Temporary Holds and Overrides
Pro Select thermostats feature ‘Hold’ and ‘Override’ functions for immediate temperature adjustments. A ‘Hold’ maintains a set temperature indefinitely, bypassing the programmed schedule until manually canceled. ‘Override’ temporarily adjusts the temperature for a specified duration, after which the thermostat reverts to its scheduled program. Access these options via the thermostat’s buttons or, if applicable, through the connected app. These features are ideal for unexpected schedule changes or short-term comfort needs, providing convenient control without permanently altering your established programming.

Advanced Features and Settings
Pro Select thermostats boast customizable options like fan control (Auto/On), filter change reminders, and adjustable backlight settings for personalized comfort and efficient operation.
Fan Control Options (Auto, On)
Pro Select thermostats provide two primary fan control settings: “Auto” and “On.” Selecting “Auto” mode ensures the fan operates only during heating or cooling cycles, optimizing energy efficiency and maintaining consistent temperatures. This prevents continuous airflow when the system isn’t actively heating or cooling. Conversely, the “On” mode keeps the fan running constantly, regardless of temperature.
This continuous airflow can improve air circulation throughout your home, potentially enhancing comfort and aiding in even temperature distribution. However, it will consume more energy. The user manual details how to toggle between these modes using the thermostat’s interface, allowing you to tailor operation to your specific needs and preferences.
Filter Change Reminders
Pro Select thermostats often include a helpful filter change reminder feature, crucial for maintaining HVAC system efficiency and air quality. This function prompts you to replace your air filter at regular intervals, preventing dust and debris buildup. The user manual explains how to activate and customize this reminder.
Typically, you can set the reminder based on a time period (e.g., every 30, 60, or 90 days) or operating hours. Ignoring filter changes can lead to reduced airflow, increased energy consumption, and potential system damage. Regularly replacing the filter ensures optimal performance and prolongs the life of your heating and cooling equipment.
Backlight Settings and Display Customization
Pro Select thermostats frequently offer adjustable backlight settings for enhanced visibility in low-light conditions. The user manual details how to control the backlight’s brightness or set it to automatically activate with button presses. Some models allow complete customization of the display, including options for screen timeout duration.
These features improve usability and conserve energy. You might be able to choose between different display modes or adjust the contrast. Refer to your specific model’s manual for detailed instructions on accessing and modifying these settings to personalize your thermostat experience and optimize readability.

Troubleshooting Common Issues
Pro Select thermostats may experience issues like failing to power on or inaccurate readings; the user manual provides solutions for these frequent problems.
Thermostat Not Turning On
If your Pro Select thermostat fails to power on, first verify the power source. As a dual-power model, it operates on 24V AC or two AA alkaline batteries. Check the circuit breaker if using AC power, ensuring it hasn’t tripped. If battery-powered, replace the batteries with fresh ones, confirming correct polarity.
Inspect the wiring connections, ensuring they are secure and haven’t loosened. A loose wire can interrupt power flow. Consult the installation instructions manual for proper wiring diagrams. If the issue persists after these checks, consult a qualified HVAC technician for further assistance, as it could indicate a more complex problem within the thermostat or heating/cooling system.
Incorrect Temperature Readings
If your Pro Select thermostat displays inaccurate temperatures, several factors could be at play. Ensure the thermostat isn’t directly exposed to sunlight, drafts, or heat-generating appliances, as these can skew readings. Verify the thermostat is calibrated correctly; some models allow for temperature offset adjustments within the settings menu.
Check for obstructions blocking airflow around the thermostat. A dirty air filter in your HVAC system can also contribute to inaccurate readings. If the problem continues, compare the thermostat’s reading with a reliable thermometer placed nearby. If a significant discrepancy exists, professional calibration or replacement may be necessary.
Connectivity Problems (if applicable)
If your Pro Select thermostat features Wi-Fi connectivity and you’re experiencing issues, first confirm your home network is functioning correctly. Ensure the thermostat is within range of your router and that the Wi-Fi password entered is accurate. Restart both the thermostat and your router as a preliminary troubleshooting step.
Check for firmware updates available through the Pro Select app or website, as these often address connectivity bugs. If problems persist, consult the Pro Select support resources or FAQ section for specific guidance related to your model. A factory reset might be necessary as a last resort.

Downloading the Pro Select Thermostat Manual
Accessing the Pro Select manual is easy! Free PDF versions are readily available online through the Pro Select website for various models like PSTSP21AWH.
Finding the PDF Manual Online
Locating your Pro Select thermostat’s PDF manual is a straightforward process. Begin by performing a web search using the specific model number – for example, “ProSelect PSTSP21AWH manual PDF.” Numerous websites archive these documents, offering direct download links. The official Pro Select website is also a primary resource; navigate to their support or downloads section.
Alternatively, utilize online document repositories. These platforms often host manuals for a wide range of appliances, including Pro Select thermostats. Ensure the downloaded manual corresponds precisely to your model to guarantee accurate installation and operational guidance. Always verify the source’s reliability before downloading.
Important Information Contained in the Manual
The Pro Select thermostat manual provides crucial details for safe and effective operation. Expect comprehensive wiring diagrams, essential for correct installation, differentiating between 24V AC power and battery operation. It details setting schedules, creating programs for weekdays/weekends, and utilizing temporary holds.
Furthermore, the manual explains fan control options (Auto, On), filter change reminders, and display customization. Troubleshooting sections address common issues like power failures or incorrect readings. Understanding dual power operation and terminology is also covered, ensuring optimal performance and longevity of your thermostat.

Battery Replacement and Maintenance
Pro Select thermostats utilize AA alkaline batteries for backup or primary power; regular checks and timely replacements ensure consistent, reliable temperature regulation and functionality.
Recommended Battery Type
Pro Select thermostats are designed for optimal performance with standard AA alkaline batteries. While other battery types might function, using alkaline ensures the longest lifespan and most consistent power delivery to the thermostat’s internal components. Avoid rechargeable batteries initially, as their voltage can sometimes differ, potentially causing inaccurate readings or operational issues.
Specifically, non-heavy-duty alkaline batteries are generally recommended. Always replace both batteries simultaneously, even if only one appears depleted, to prevent potential imbalances and ensure continued reliable operation. Using the correct battery type safeguards the thermostat’s functionality and prolongs its overall lifespan.
Extending Battery Life
To maximize the longevity of your Pro Select thermostat’s batteries, consider a few simple strategies. Avoid frequent temperature adjustments, as each change consumes power. Utilize the scheduling features to maintain a consistent temperature profile, minimizing unnecessary heating or cooling cycles. If your model offers a backlight, reduce its brightness or set it to automatically turn off after a short period of inactivity.
Furthermore, ensure the thermostat isn’t exposed to extreme temperatures or direct sunlight, which can degrade battery performance. Regularly check for and eliminate any drafts near the thermostat, reducing the workload on the system and conserving power.
Pro Select Thermostat Compatibility
Pro Select thermostats are designed for standard 24 Volt AC heating and cooling systems, or operate with two AA alkaline batteries for versatile installation;
Compatible Heating and Cooling Systems
Pro Select thermostats demonstrate broad compatibility, functioning seamlessly with conventional forced air systems, heat pumps, and radiant heating. They support single-stage, multi-stage, and heat pump configurations, offering flexibility for diverse home setups. Crucially, these thermostats require a 24VAC common (C) wire for optimal performance with most systems. However, dual-power operation allows functionality with just batteries, bypassing the C-wire requirement in certain installations. Compatibility extends to gas, oil, and electric furnaces, ensuring widespread applicability. Always verify voltage requirements before installation to avoid system damage.
Voltage Requirements
Pro Select thermostats are primarily designed for 24 Volt AC (VAC) systems, a standard in most residential heating and cooling setups. This low voltage ensures safe and efficient operation. However, a key feature is ‘dual power’ operation, allowing the thermostat to also run on two AA alkaline batteries as a backup or primary power source. While 24VAC is typical, confirming your existing system’s voltage is crucial before installation. Incorrect voltage can cause malfunction or damage. Do not connect a Pro Select thermostat to a higher voltage source, such as 120VAC or 240VAC.

Understanding Pro Select Terminology
“Pro” in Pro Select originates from Greek, meaning “before” or “forward,” indicating advanced features, while “dual power” signifies battery or 24VAC operation.
“Pro” Prefix Meaning in Context
The prefix “pro” within the Pro Select brand name carries significant etymological weight, originating from the Greek language. Historically, “pro” signified “before,” “forward,” or “in front of,” evolving to denote support or advocacy – as seen in terms like “pro-choice” or “pro-American.”
In the context of Pro Select thermostats, “pro” suggests a level of sophistication and capability beyond standard models. It implies features geared towards professional installers and users who demand reliable, advanced control. Furthermore, it can also allude to a primitive or early form, hinting at foundational quality.
Dual Power Operation Explained
Pro Select thermostats boast a versatile “dual power” operation, a key feature for uninterrupted heating and cooling. This means the thermostat can function using either 24 Volts AC power – the standard for most HVAC systems – or two AA alkaline batteries.
This redundancy ensures continued operation even during power outages, providing peace of mind. The thermostat intelligently switches between power sources. When AC power is restored, it automatically reverts, conserving battery life. This design offers both convenience and reliability, making Pro Select a robust choice.

Resources and Support
Pro Select provides comprehensive support through its official website, offering downloadable manuals, FAQs, and direct contact options for assistance with your thermostat.
Pro Select Website and Contact Information
Pro Select, while seemingly focused through distributors like Pro Office, doesn’t maintain a prominently displayed, dedicated consumer-facing website as of late 2024. Information is often accessed through retailer sites or documentation portals. Direct contact information is similarly dispersed.
However, support can frequently be obtained through the retailer where the thermostat was purchased. Searching for “ProSelect thermostat support” will yield relevant contact details for distributors. For general inquiries related to the ‘pro’ prefix meaning, exploring etymological resources can be helpful. Remember to have your model number ready when seeking assistance.
Frequently Asked Questions (FAQ)
Q: What does “pro” mean in Pro Select? A: It originates from the Greek prefix meaning “before” or “forward,” indicating advanced features.
Q: Does Pro Select offer smart thermostat options? A: Currently, information suggests a focus on traditional, programmable thermostats, not fully integrated smart home systems.
Q: Where can I find a Pro Select thermostat manual? A: Search online for your specific model number (e.g., PSTSP21AWH) to locate downloadable PDF manuals. Retailer websites are also good resources.
Q: What power source does it use? A: Pro Select thermostats utilize dual power – 24V AC or two AA alkaline batteries.







































































