Lennox 27K79 Primary Limit Switch F Auto Reset Boiler Safety Controls & Aquastats - 175

The Lennox 27K79 is a genuine OEM primary limit control switch designed for reliable temperature monitoring and safety protection in Lennox gas furnaces and HVAC systems. This critical safety component automatically shuts off the unit when temperatures reach excessive levels to prevent damage and protect the system.

Key Specifications:

• Cut-out temperature: 175°F, Cut-in temperature: 145°F
• Automatic reset, normally closed circuit
• Single pole, single throw (SPST) configuration
• 3-inch insertion length
• Operating voltage: 24 volts

Compatibility:

Replaces legacy Lennox part number 27K7901 and is compatible with multiple Lennox furnace models including LF24-30A, LF24-45A, LF24-60A, LF24-75A series, CGHA30AE, CGHA45AE, CGHA60AE series, and TUA045SNAF, TUA060SNAF, TUA075SNAF models.

This genuine Lennox OEM part ensures proper fit, reliable operation, and maintains your system's published efficiency ratings and safety certifications for both residential and commercial heating applications.