York S1-THEH21P5S Thermostat
As a technician, you know that keeping a heat pump system running efficiently requires a robust interface. The York S1-THEH21P5S Thermostat is a high-performance 5-2 day programmable thermostat designed specifically for 2-stage heat / 1-stage cool heat pump applications. This unit features a backlit digital display that provides clear visibility in dark mechanical rooms or hallways, allowing for easy monitoring of the auxiliary heat indicator and service filter indicator.
The Source One S1-THEH21P5S offers the flexibility of being battery or system powered, ensuring your settings aren't lost during power fluctuations. With its dedicated emergency heat switch, contractors can provide homeowners with a reliable fallback during primary compressor issues. This York OEM replacement thermostat is built for the field, featuring straightforward terminal labeling for 4-wire or 5-wire configurations and compatibility with most residential split systems and package units utilizing O or B reversing valves.
Key Benefits:
- Optimized Staging: Supports 2H/1C heat pump configurations to maximize efficiency across various outdoor ambient temperatures.
- Maintenance Alerts: Integrated service filter indicator (adjustable from 0-1950 hours) ensures peak airflow and protects the blower motor.
- Dual Power Capability: Operates on 24V common wire or two AA alkaline batteries for versatile installation in older homes.
- Manual Override: Simple toggles for emergency heat and fan modes (On/Auto) provide immediate system control for diagnostic testing.
Common Questions:
Is this thermostat compatible with a 'C' wire?
Yes, while it can run on batteries, connecting the common wire (C) is recommended for permanent 24V system power and consistent backlighting.
Does this unit support emergency heat?
Absolutely. The physical Aux Heat switch allows for "Emergency" mode, which disables the compressor and forces the system to rely solely on auxiliary heat strips.
How do I reset the filter light?
Simply press and hold the "Reset Filter" button on the interface after the air filter has been replaced to clear the icon from the display.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $113.85
-65%$113.85
$39.85York S1-THEH21P5S Thermostat
As a technician, you know that keeping a heat pump system running efficiently requires a robust interface. The York S1-THEH21P5S Thermostat is a high-performance 5-2 day programmable thermostat designed specifically for 2-stage heat / 1-stage cool heat pump applications. This unit features a backlit digital display that provides clear visibility in dark mechanical rooms or hallways, allowing for easy monitoring of the auxiliary heat indicator and service filter indicator.
The Source One S1-THEH21P5S offers the flexibility of being battery or system powered, ensuring your settings aren't lost during power fluctuations. With its dedicated emergency heat switch, contractors can provide homeowners with a reliable fallback during primary compressor issues. This York OEM replacement thermostat is built for the field, featuring straightforward terminal labeling for 4-wire or 5-wire configurations and compatibility with most residential split systems and package units utilizing O or B reversing valves.
Key Benefits:
- Optimized Staging: Supports 2H/1C heat pump configurations to maximize efficiency across various outdoor ambient temperatures.
- Maintenance Alerts: Integrated service filter indicator (adjustable from 0-1950 hours) ensures peak airflow and protects the blower motor.
- Dual Power Capability: Operates on 24V common wire or two AA alkaline batteries for versatile installation in older homes.
- Manual Override: Simple toggles for emergency heat and fan modes (On/Auto) provide immediate system control for diagnostic testing.
Common Questions:
Is this thermostat compatible with a 'C' wire?
Yes, while it can run on batteries, connecting the common wire (C) is recommended for permanent 24V system power and consistent backlighting.
Does this unit support emergency heat?
Absolutely. The physical Aux Heat switch allows for "Emergency" mode, which disables the compressor and forces the system to rely solely on auxiliary heat strips.
How do I reset the filter light?
Simply press and hold the "Reset Filter" button on the interface after the air filter has been replaced to clear the icon from the display.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
As a technician, you know that keeping a heat pump system running efficiently requires a robust interface. The York S1-THEH21P5S Thermostat is a high-performance 5-2 day programmable thermostat designed specifically for 2-stage heat / 1-stage cool heat pump applications. This unit features a backlit digital display that provides clear visibility in dark mechanical rooms or hallways, allowing for easy monitoring of the auxiliary heat indicator and service filter indicator.
The Source One S1-THEH21P5S offers the flexibility of being battery or system powered, ensuring your settings aren't lost during power fluctuations. With its dedicated emergency heat switch, contractors can provide homeowners with a reliable fallback during primary compressor issues. This York OEM replacement thermostat is built for the field, featuring straightforward terminal labeling for 4-wire or 5-wire configurations and compatibility with most residential split systems and package units utilizing O or B reversing valves.
Key Benefits:
- Optimized Staging: Supports 2H/1C heat pump configurations to maximize efficiency across various outdoor ambient temperatures.
- Maintenance Alerts: Integrated service filter indicator (adjustable from 0-1950 hours) ensures peak airflow and protects the blower motor.
- Dual Power Capability: Operates on 24V common wire or two AA alkaline batteries for versatile installation in older homes.
- Manual Override: Simple toggles for emergency heat and fan modes (On/Auto) provide immediate system control for diagnostic testing.
Common Questions:
Is this thermostat compatible with a 'C' wire?
Yes, while it can run on batteries, connecting the common wire (C) is recommended for permanent 24V system power and consistent backlighting.
Does this unit support emergency heat?
Absolutely. The physical Aux Heat switch allows for "Emergency" mode, which disables the compressor and forces the system to rely solely on auxiliary heat strips.
How do I reset the filter light?
Simply press and hold the "Reset Filter" button on the interface after the air filter has been replaced to clear the icon from the display.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
