PRO-1 T855SH Universal Programmable Thermostat – Up to 5 Heat / 3 Cool, Auto Changeover

PRO-1 T855SH Universal Programmable Thermostat – Residential & Light Commercial HVAC Control

Take complete control of your HVAC system with the PRO-1 T855SH Universal Programmable Thermostat. Designed for both residential and light commercial applications, this thermostat supports up to 5 Heat / 3 Cool stages for heat pumps and 2 Heat / 2 Cool for conventional systems, making it one of the most versatile options available. Featuring auto changeover, an intuitive programming menu, and a large 8 sq. inch backlit display, the T855SH offers convenience, flexibility, and precision temperature control.

Key Features & Benefits:

✅ Universal Compatibility – Works with heat pumps (5H/3C) and conventional HVAC systems (2H/2C).
✅ Programmable or Non-Programmable Modes – Choose 7-day, 5/1/1, or non-programmable settings based on your needs.
✅ Auto Changeover – Automatically switches between heating and cooling for year-round comfort.
✅ Large 8 Sq. Inch Display – Blue backlit LCD screen for easy readability in any lighting conditions.
✅ Intuitive Programming Icons – Wake, leave, return, and sleep icons simplify scheduling.
✅ Glow-in-the-Dark Light Button – Easily adjust settings at night.
✅ Programmable Fan Control – Customize fan settings for optimal airflow and energy efficiency.
✅ Room Temperature Calibration Adjustment – Fine-tune temperature accuracy for precise comfort.
✅ Heating & Cooling Cycle Rate Adjustments – Set separate cycle rates for heating and cooling, including 2nd-stage adjustments.
✅ Keypad Lockout & Setpoint Limits – Prevent unauthorized temperature adjustments.
✅ 5-Minute Compressor Delay Protection – Protects your HVAC system from short cycling (selectable on/off).
✅ Filter Change Indicator – Set reminders for air filter changes (selectable on/off).
✅ Easy Installation – Features color-coded terminal blocks, a universal sub-base, and wall/junction box mounting for quick setup.
✅ Electric or Gas Configurable – Compatible with both electric and gas heating systems.
✅ Battery or Hardwire Power – Operates on batteries or a 24V power source.
✅ 5-Year Warranty – Backed by a 5-year manufacturer warranty for peace of mind.

Specifications:

• Brand: PRO-1
• Model: T855SH
• System Compatibility: Universal (Residential & Light Commercial)
• Heat/Cool Stages: 5 Heat / 3 Cool (Heat Pump), 2 Heat / 2 Cool (Conventional)
• Thermostat Type: Programmable (7-Day, 5/1/1) or Non-Programmable
• Power Options: Battery or Hardwire (24V)
• Display: 8 sq. inch blue backlight
• Mounting: Wall or Junction Box
• Thermostat Mobility: Stationary
• Warranty: 5 Years

Why Choose the PRO-1 T855SH?

The PRO-1 T855SH Universal Thermostat is ideal for homeowners, property managers, and businesses looking for a high-quality, feature-rich thermostat that offers maximum control over heating and cooling systems. Whether you're using a high-stage heat pump or a conventional system, this thermostat delivers energy efficiency, ease of use, and advanced programming options.

Need Help? Contact Us!

If you have any questions about the PRO-1 T855SH Universal Programmable Thermostat, please call us to speak with a customer service representative. They will be happy to help!

As always, purchase your MRCOOL parts and equipment from the USA’s most trusted MRCOOL dealer, MRCOOL DIY Direct.