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York LX series - User Manual

York LX series
56 pages
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Owners Manual
Owners Manual
Digital Thermostat
LX Series
Digital Thermostat
LX Series
RESIDENTIAL
S1-THSU21P1
S1-THSU32P7
S1-THSU32HP7
Model
BACKLIT DISPLAY
and
and
Installation Instructions
Installation Instructions

Other manuals for York LX series

Questions and Answers

  • I
    Ian OsbornJul 26, 2025
    What to do if my York Thermostat air conditioning does not turn on?
    • U
      ugoodwinJul 26, 2025
      If your York thermostat isn't turning on the air conditioning, it might be because the cooling setpoint is set too high. Try lowering the cooling setpoint or lowering the cooling set-point limit.
  • M
    Margaret KaneAug 3, 2025
    Why is the display blank on my York Thermostat?
    • C
      Cindy AllenAug 3, 2025
      If your York thermostat display is blank, it indicates a lack of proper power. Ensure that the power to the furnace is on and that you have 24vac between R & C.
  • C
    cindy30Aug 9, 2025
    What to do if both heat and cool come on when calling for cooling with my York Thermostat?
    • S
      Sara GarrisonAug 10, 2025
      If your York thermostat is calling for cooling, but both the heat and cool are activated, it means the thermostat equipment jumper is configured for “HP” while your HVAC unit is a Gas/Electric. To resolve this, set the equipment jumper for “Gas”.
  • S
    Samuel MartinAug 17, 2025
    What to do if my York Thermostat heating does not turn on?
    • D
      Darren RodriguezAug 17, 2025
      If your York thermostat isn't turning on the heating, it might be because the heating setpoint is set too low. Try raising the heating setpoint or raise the heating set- point limit.

Summary

Quick Start

Setting Temperature and Basic Operation

Guides on selecting desired temperatures, using the fan, and viewing sensor data.

Installation Instructions

Remove & Replace the Old Thermostat

Step-by-step guide for removing the old thermostat and preparing for new installation.

Wire Connections

Explains terminal designations and their functions for connecting the thermostat.

Thermostat Backplate and Jumpers

Identifies backplate terminals and explains the function of thermostat jumpers.

Sample Wiring Diagrams

Provides wiring diagrams for conventional, heat pump, and dual fuel systems.

Installation Instructions: Test Operation

Technician Setup

Advanced Setup Table

Troubleshooting

York LX series Specifications

General IconGeneral
RefrigerantR-410A
SeriesLX
Cooling Capacity1.5 to 5 tons
Warranty10-year limited warranty
Sound LevelAs low as 72 dBA (depending on model)

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