
MARS 39225 Limit Switch
The MARS 39225 Adjustable Limit Switch is a high-performance open-on-rise thermal safety control designed for precise temperature regulation in HVAC systems, furnaces, and industrial heating applications. Built for the rigors of field service, this adjustable limit switch offers a flexible setpoint range of 175°F to 215°F, allowing technicians to dial in the exact thermal parameters required for specific equipment. It features a robust SPST switch mechanism compatible with 120V and 240V circuits and includes a 40°F fixed differential for reliable cycling. The MARS 39225 is engineered with a standard 2-hole oval mounting flange and 1/4-inch quick-connect terminals to streamline replacements during maintenance calls. This versatile component serves as a direct cross-reference for common parts like the Gem AT013 and White-Rodgers 3L05-2, significantly reducing the need to carry specialized inventory. Professional-grade construction ensures durability in demanding environments, protecting critical components from overheating while maintaining system equilibrium.
Key Benefits- Broad Temperature Range: Field-adjustable between 175°F and 215°F to meet diverse furnace and boiler safety requirements.
- Universal Compatibility: Replaces multiple fixed-temperature limits, allowing contractors to consolidate truck stock.
- Precise Response: The open-on-rise action provides a positive safety cut-out the moment thermal thresholds are exceeded.
- Professional Grade: Features heavy-duty 1/4" terminals and a durable steel housing for long-term electrical reliability.
- Easy Installation: The integral oval flange design ensures a secure fit in standard mounting holes for rapid field replacement.
What is the differential for the MARS 39225?
This switch operates with a 40°F differential, ensuring the system resets appropriately once the temperature drops below the setpoint.
What parts can the MARS 39225 replace?
It is a highly compatible replacement for several industry standards, including the Gem AT013 and White-Rodgers 3L05-2 series.
How do I adjust the temperature setting?
The unit features a built-in indicator dial that allows you to manually select the desired cut-out temperature between 175°F and 215°F.
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.
MARS 39225 Limit Switch
The MARS 39225 Adjustable Limit Switch is a high-performance open-on-rise thermal safety control designed for precise temperature regulation in HVAC systems, furnaces, and industrial heating applications. Built for the rigors of field service, this adjustable limit switch offers a flexible setpoint range of 175°F to 215°F, allowing technicians to dial in the exact thermal parameters required for specific equipment. It features a robust SPST switch mechanism compatible with 120V and 240V circuits and includes a 40°F fixed differential for reliable cycling. The MARS 39225 is engineered with a standard 2-hole oval mounting flange and 1/4-inch quick-connect terminals to streamline replacements during maintenance calls. This versatile component serves as a direct cross-reference for common parts like the Gem AT013 and White-Rodgers 3L05-2, significantly reducing the need to carry specialized inventory. Professional-grade construction ensures durability in demanding environments, protecting critical components from overheating while maintaining system equilibrium.
Key Benefits- Broad Temperature Range: Field-adjustable between 175°F and 215°F to meet diverse furnace and boiler safety requirements.
- Universal Compatibility: Replaces multiple fixed-temperature limits, allowing contractors to consolidate truck stock.
- Precise Response: The open-on-rise action provides a positive safety cut-out the moment thermal thresholds are exceeded.
- Professional Grade: Features heavy-duty 1/4" terminals and a durable steel housing for long-term electrical reliability.
- Easy Installation: The integral oval flange design ensures a secure fit in standard mounting holes for rapid field replacement.
What is the differential for the MARS 39225?
This switch operates with a 40°F differential, ensuring the system resets appropriately once the temperature drops below the setpoint.
What parts can the MARS 39225 replace?
It is a highly compatible replacement for several industry standards, including the Gem AT013 and White-Rodgers 3L05-2 series.
How do I adjust the temperature setting?
The unit features a built-in indicator dial that allows you to manually select the desired cut-out temperature between 175°F and 215°F.
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
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Shipping & Returns
Description
The MARS 39225 Adjustable Limit Switch is a high-performance open-on-rise thermal safety control designed for precise temperature regulation in HVAC systems, furnaces, and industrial heating applications. Built for the rigors of field service, this adjustable limit switch offers a flexible setpoint range of 175°F to 215°F, allowing technicians to dial in the exact thermal parameters required for specific equipment. It features a robust SPST switch mechanism compatible with 120V and 240V circuits and includes a 40°F fixed differential for reliable cycling. The MARS 39225 is engineered with a standard 2-hole oval mounting flange and 1/4-inch quick-connect terminals to streamline replacements during maintenance calls. This versatile component serves as a direct cross-reference for common parts like the Gem AT013 and White-Rodgers 3L05-2, significantly reducing the need to carry specialized inventory. Professional-grade construction ensures durability in demanding environments, protecting critical components from overheating while maintaining system equilibrium.
Key Benefits- Broad Temperature Range: Field-adjustable between 175°F and 215°F to meet diverse furnace and boiler safety requirements.
- Universal Compatibility: Replaces multiple fixed-temperature limits, allowing contractors to consolidate truck stock.
- Precise Response: The open-on-rise action provides a positive safety cut-out the moment thermal thresholds are exceeded.
- Professional Grade: Features heavy-duty 1/4" terminals and a durable steel housing for long-term electrical reliability.
- Easy Installation: The integral oval flange design ensures a secure fit in standard mounting holes for rapid field replacement.
What is the differential for the MARS 39225?
This switch operates with a 40°F differential, ensuring the system resets appropriately once the temperature drops below the setpoint.
What parts can the MARS 39225 replace?
It is a highly compatible replacement for several industry standards, including the Gem AT013 and White-Rodgers 3L05-2 series.
How do I adjust the temperature setting?
The unit features a built-in indicator dial that allows you to manually select the desired cut-out temperature between 175°F and 215°F.
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.












