How To Set ProSelect Thermostat: A Simple Step-by-Step Manual

Did you know your ProSelect thermostat can maintain temperature accuracy within 1°F (0.5°C) while offering a control range from 45° to 90°F? That’s the kind of precision you need for year-round comfort.

Whether you’re at home or away, this smart device offers convenient 5-2 day programming that lets you set different temperatures for weekdays and weekends. Additionally, its large blue backlit display ensures clear visibility in any lighting condition, while the non-volatile memory keeps your settings safe even during power outages.

We understand that setting up a new thermostat can seem challenging at first. That’s why we’ve created this comprehensive guide to help you master your ProSelect thermostat’s features and optimize your home’s comfort. Let’s walk through the setup process together!

Understanding Your ProSelect Thermostat Display

The ProSelect thermostat features a large 2-square-inch display with a cool white backlight, making settings easily visible in any lighting condition. The screen shows essential information through several basic elements that help monitor and control your home’s temperature effectively.

Basic Display Elements and What They Mean

The main display shows the current room temperature and your desired set point temperature. When you adjust settings, the word “SET” appears on screen, indicating you’re in adjustment mode. The display includes status indicators that show your system’s current state:

• HEAT – Appears when in heating mode, flashes during operation
• COOL – Shows when cooling is selected, flashes while running
• AUX – Displays when auxiliary heating activates (on PSTS21NP models)

Different Operating Modes Explained

The thermostat operates within a temperature range of 32°F to 99°F (0°C to 37°C). Specifically, the system maintains precise comfort control with an accuracy of ±1°F. Furthermore, the device includes a compressor protection feature that automatically provides a 5-minute delay after shutting off, preventing potential system damage.

Important Buttons and Their Functions

The control panel includes essential buttons for temperature adjustment and system management. Notably, the device offers dual-power functionality, operating either through hardwiring or battery power. The system includes adjustable temperature limits, allowing you to set custom ranges for both heating and cooling operations.

A unique feature of this thermostat is its three-stage low battery indicator system:

• Stage 1: Solid indicator (0-30 days remaining)
• Stage 2: Flashes every 2 seconds (31-60 days remaining)
• Stage 3: Flashes every second (61-90 days remaining)

The non-volatile memory ensures your settings remain intact even during power outages. Additionally, the thermostat includes a filter check monitor and adjustable temperature differential settings for enhanced control over your comfort preferences.

Setting Basic Temperature Controls

Mastering basic temperature controls on your ProSelect thermostat starts with understanding its precise temperature range of 45° to 90°F (7° to 32°C). The system maintains accuracy within ±1°F (±0.5°C), ensuring consistent comfort throughout your space.

How to Adjust Current Temperature

Follow these steps to modify your desired temperature:

1. Press and hold the up or down arrow button
2. Watch for the “SET” indicator to appear on screen
3. Release the button to see current set point
4. Press again to adjust to desired temperature
5. Wait 15 seconds for display to return to normal

Using the Hold Button Feature

The hold button serves as a temperature lock mechanism, maintaining your chosen temperature regardless of programmed schedules. Once activated, this setting remains until manually changed. For extended periods away, such as vacations, the hold function prevents automatic temperature changes.

The system offers two hold options:

• Temporary hold: Maintains temperature for 4 hours
• Extended hold: Keeps settings until manually released

To cancel a hold setting, simply press the “Run” button, consequently returning to your regular programming schedule.

Switching Between Heat and Cool Modes

The ProSelect thermostat maintains separate temperature settings for heating and cooling. In fact, this feature allows precise control as seasons change. For optimal performance, set your desired temperature at least 3 degrees higher or lower than the current room temperature when switching modes.

The system includes an automatic protection feature that creates a 5-minute delay after turning off cooling. Therefore, this prevents potential damage from short cycling. As a result, you might notice a brief waiting period when switching between heating and cooling modes.

For maximum efficiency, consider using the auto-changeover feature, which automatically switches between heating and cooling to maintain your desired temperature range. This eliminates the need for manual mode adjustments as temperatures fluctuate throughout the day.

Programming Schedule Settings

The ProSelect thermostat comes with energy-efficient pre-programmed settings for both weekdays and weekends, making temperature management simple and automatic.

Setting Weekday Temperature Schedule

The weekday programming covers Monday through Friday with four distinct time periods: Morning, Day, Evening, and Night. To program weekday settings:

1. Switch to HEAT mode
2. Press PROG to enter programming mode
3. Adjust the MORN set point (display shows M, TU, W, TH, F)
4. Set desired temperature and time
5. Continue with DAY, EVE, and NIGHT settings

Subsequently, these settings automatically maintain efficient energy usage during normal heating and cooling operations.

Weekend Programming Options

Weekend programming primarily focuses on Saturday and Sunday schedules. Essentially, the system displays SA and SU indicators when adjusting weekend settings. The flexibility allows you to set different temperatures for:

• Morning wake-up time
• Daytime settings
• Evening comfort levels
• Nighttime temperatures

Moreover, each time period can be customized to match your weekend routine while maintaining energy efficiency.

Overriding Programmed Settings

The ProSelect thermostat offers two convenient ways to override your regular program schedule. The first option is a temporary override that lasts for 4 hours or until the next scheduled set point.

For longer periods, the Extended Hold (Vacation) Mode provides more flexibility. To activate this feature:

1. Press the HOLD button to bypass the program schedule
2. The system maintains your selected temperature either permanently or for 24 hours
3. Press HOLD again to return to normal programming

Accordingly, you can modify the Extended Hold duration by pressing the RETURN button for 4 seconds in normal mode. The display shows ‘HOLD LG’ for indefinite hold, and you can use the up/down buttons to switch between indefinite (LG) and 24-hour (SH) hold periods.

The non-volatile memory ensures your programmed settings remain intact even during power interruptions. This feature, combined with the Filter Check Monitor and Adaptive Recovery Mode, helps maintain optimal performance while following your preferred temperature schedule.

Advanced Features Configuration

Fine-tuning your ProSelect thermostat’s advanced features unlocks optimal performance and enhanced comfort control. Let’s explore these sophisticated settings that make your system more efficient.

Temperature Differential Settings

The temperature differential determines how precisely your system maintains your desired temperature. Initially, the first stage differential comes preset to 0.5°F, though you can modify this setting through these steps:

1. Press and hold RETURN for 4 seconds
2. Look for “SET D1 x˚” on display
3. Use arrow buttons to select 0.5°, 1°, or 2°F
4. Press RETURN to confirm

For dual-stage systems, the second stage differential starts at 2°F. Upon completion of first stage settings, press RETURN again to adjust the second stage differential between 2° and 5°F.

Fan Operation Modes

The fan system primarily operates in two distinct modes. The Auto setting runs the fan exclusively when heating or cooling is active. Alternatively, the On mode keeps the fan running continuously, particularly useful for consistent air circulation.

System Maintenance Reminders

The ProSelect includes a sophisticated Filter Check Monitor that helps maintain system efficiency. The monitor displays maintenance reminders by flashing “FILT” on screen. To configure this feature:

The default setting begins at 0 days (disabled). You can customize the reminder interval to:

• 30 days
• 60 days
• 90 days
• 120 days
• 180 days

The system includes an automatic compressor protection mechanism that prevents potential damage from short cycling. This feature enforces a 5-minute delay after shutting off the cooling system. The protection extends to both cooling operations and heat pump systems.

The thermostat’s non-volatile memory preserves all these advanced settings even during power interruptions. If needed, you can reset all configurations to factory defaults using the RESET button, though this should only be done when absolutely necessary.

For optimal performance, the differential settings typically need adjustment only during initial installation. These advanced configurations work together to create a balanced, efficient, and comfortable environment while protecting your HVAC system from unnecessary wear.

Common Issues and Solutions

Encountering issues with your ProSelect thermostat? Let’s explore common problems and their solutions to keep your system running smoothly.

Why Thermostat Keeps Changing Temperature

Primarily, temperature fluctuations occur due to programming discrepancies or system protection features. Before assuming there’s a malfunction, check these common causes:

1. Safety Switch Activation: The thermostat includes a protection feature that triggers when detecting excess moisture or high temperatures
2. Programming Schedule: Your thermostat might be following a pre-set schedule that changes temperatures at specific times
3. System Configuration: Verify the thermostat is properly configured for your specific heating and cooling equipment

The ProSelect maintains temperature accuracy within ±1°F (±0.5°C). Nevertheless, if your system continues to change temperatures unexpectedly, check the temperature differential settings, which can be adjusted between 0.5°F and 2°F for optimal performance.

Display Problems Troubleshooting

Upon encountering display issues, start with these basic checks:

Blank Display:

• Check power supply: The thermostat requires either 24 Volts AC power or two AA alkaline batteries
• Examine circuit breaker: Reset if tripped
• Inspect safety switches: Look for triggered protection mechanisms
• Clean wiring connections: Remove dust accumulation with a soft brush

Error Codes:

• HI: Indicates temperature above 99°F (37°C)
• LO: Shows temperature below 40°F (4°C)
• NO AUX SET: Appears when conventional system switch is in EM HEAT position

Battery Replacement Guide

The ProSelect features a sophisticated three-stage battery monitoring system:

Stage Indicators:

• Stage 1: Solid indicator (0-30 days remaining)
• Stage 2: Flashes every 2 seconds (31-60 days)
• Stage 3: Flashes every second (61-90 days)

For proper battery replacement:

1. Open the front cover to locate battery compartment
2. Remove existing AA alkaline batteries
3. Insert new batteries, matching positive (+) ends with positive terminals
4. Close compartment securely
5. Wait for display to normalize

Important Notes: Replace batteries annually, even without low battery indicators. The non-volatile memory retains your settings during battery changes. Despite battery power, the system can operate on 24 Volt AC power with a maximum load of 1 amp per terminal.

Before calling a professional, verify basic system functions. Occasionally, simple issues like dirty air filters or incorrect mode settings cause apparent malfunctions. However, if problems persist after trying these solutions, contact a qualified HVAC technician, particularly for issues involving electrical components or system configuration.

Conclusion

Understanding your ProSelect thermostat unlocks a world of comfort and efficiency for your home. Through precise temperature control and smart programming features, this device stands ready to maintain your ideal indoor climate year-round.

Basic operation proves straightforward once you master the essential controls and programming options. Advanced features like temperature differential settings and maintenance reminders help protect your HVAC system while ensuring optimal performance.

Remember that most display issues and temperature fluctuations have simple solutions. Regular battery checks, proper programming, and basic maintenance will keep your thermostat running smoothly. Should problems arise, follow the troubleshooting steps before calling professional help.

Your ProSelect thermostat serves as a reliable partner in creating comfortable living spaces while managing energy use effectively. Start with basic settings, gradually explore advanced features, and soon you’ll enjoy complete control over your home’s climate.