Daikin-McQuay 1370905S Auto Limit Switch 260-290°F 3.25" Insertion

The Daikin-McQuay 1370905S is a genuine OEM auto-reset high-limit safety switch engineered for use in condensing gas furnaces and other compatible HVAC heating equipment. With a temperature operating range of 260°F to 290°F (L290-30F) and a 3.25-inch insertion length, this limit switch monitors heat exchanger temperatures and automatically cuts power to the burner circuit if unsafe temperature thresholds are exceeded, protecting the unit from overheating damage.

Key Features:

• Auto-reset limit switch — restores operation automatically once temperatures return to safe levels
• Temperature range: 260°F open / 290°F close (L290-30F rating)
• Insertion length: 3.25 inches
• Size: 36T01 (M4)
• Rated 20 amps at 120/240VAC
• Maximum switching capacity: 1 HP
• Positive snap-action mechanism for precise, reliable switching
• UL and CSA approved for safety compliance
• Compatible with GCC090B40A, GCC090B40B, GCC090B50A, GCC090B50B condensing gas furnaces and other Daikin/McQuay, Goodman, and Amana HVAC systems using this part number

This is a direct OEM replacement limit switch. Proper installation ensures safe, efficient furnace operation by preventing heat exchanger overheating. Always disconnect power before servicing HVAC equipment.