Trane THT2243 Thermostat

The Trane THT2243 Thermostat is a heavy-duty 240V SPST thermostat specifically engineered as a limit control and temperature regulator for commercial and residential condenser units. Operating as a single-pole, single-throw (SPST) switch, this component is designed for 105Op73Cl operation, meaning it triggers an open circuit at 105°F and restores the connection when temperatures drop to 73°F. Professional technicians rely on this OEM replacement part for high-voltage HVACR applications where precise thermal cutout is critical to equipment safety and cycle management. Its robust construction ensures reliable performance in demanding environments, specifically fitting several 2TWA series split system cooling condensers. Integrating this high-limit thermostat into your service routine ensures that system parameters remain within factory specifications, preventing compressor overheating or uncontrolled discharge temperatures. Whether you are performing a seasonal overhaul or a critical emergency repair, the Trane THT2243 provides the exact electrical switching required for 240-volt control circuits.

• Precise Thermal Calibration: Factory-set at 105°F open and 73°F close for accurate system protection.
• High-Voltage Compatibility: Rated for 240V applications, making it ideal for condenser and heat pump control loops.
• OEM Standards: Guaranteed to meet original equipment manufacturer specifications for fit and switching logic.
• Durable Construction: Built to withstand the vibration and temperature fluctuations common in outdoor condenser cabinets.
• Simplified Wiring: SPST configuration allows for straightforward integration into existing series circuits without complex modification.

What is the primary function of the 105Op73Cl specification?
This designates the operational set points. The thermostat will open the electrical circuit when the sensed temperature reaches 105°F (to prevent overheating) and will close (reset) once the temperature cools to 73°F.

Can the THT2243 be used in 120V circuits?
While the unit is rated for 240V, it is a mechanical switch. However, always verify that the amperage load and voltage phase match the specific wiring diagram of the unit you are servicing to ensure proper switching under load.

Is this a universal HVAC thermostat?
No, this is a specialized component used primarily as an internal limit control for specific Trane and American Standard condenser models. It is not a wall-mounted temperature control for cabin comfort.

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.