Description
The Mars 39225 Adjustable Limit Switch is a dependable safety and control component engineered for use in furnaces and other HVAC heating systems. With an adjustable operating range spanning 175°F to 215°F, this limit switch provides precise high-temperature protection, automatically interrupting the circuit when temperatures exceed safe thresholds and helping prevent equipment damage or unsafe operating conditions.
Designed for straightforward installation and long-lasting performance, the Mars 39225 is a trusted replacement or upgrade option for residential and light commercial heating applications. Its adjustable setpoint gives technicians the flexibility to fine-tune the switch to the specific requirements of the system, reducing nuisance trips while maintaining critical safety margins.
Key Features
- Adjustable temperature range: 175°F to 215°F
- Provides high-limit protection for furnaces and heating equipment
- Adjustable setpoint for system-specific calibration
- Designed for reliable, long-term performance in demanding HVAC environments
- Suitable for residential and light commercial heating applications
- Direct replacement for compatible Mars limit switch applications
Applications
- Gas and electric forced-air furnaces
- Heating systems requiring high-limit temperature protection
- Replacement of worn or failed OEM limit switches







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