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White-Rodgers board-mount limit control 3.12 inch probe 200F open 180F close

Emerson Climate Technologies

Emerson Climate Technologies WHITE-RODGERS 3L09-25 Board Mount Limit Control 200F 180F 3.12 air conditioning

SKU CH-WFSG-G4RT7

Board-mount limit control opens at 200°F, closes at 180°F, with 3.12-inch probe

  • Board mount design simplifies installation in tight HVAC spaces
  • Automatic reset at 180°F restores operation without manual intervention
  • Safety cut-out at 200°F protects equipment from overheating damage
  • 12 inch probe length fits standard furnace and AC assemblies
  • WHITE-RODGERS branding confirms genuine Emerson Climate Technologies component

WHITE-RODGERS 3L09-25 Limit Control

The WHITE-RODGERS 3L09-25 is a board-mounted limit control designed for HVAC systems in recreational vehicles. It opens the circuit at 200°F and automatically resets when the temperature drops to 180°F. The compact 3.12-inch body mounts directly to the equipment board for reliable high-temperature protection.

Suited for RV furnace

This control fits applications that require a fixed 200°F trip point with a 20°F differential. It is not intended for systems needing adjustable temperature settings, different trip points, or remote-capillary mounting. Builders who require a manual-reset limit or a wider operating range should select an alternative device.

Installs directly on the appliance control board

The board-mount design eliminates separate brackets and reduces wiring length inside the furnace cabinet. The 3.12-inch footprint leaves space for adjacent relays and ignition modules. Verify the mounting hole pattern and electrical ratings match the original equipment specification before installation.

Highlights

  • Board mount design simplifies installation in tight HVAC spaces
  • Automatic reset at 180°F restores operation without manual intervention
  • Safety cut-out at 200°F protects equipment from overheating damage
  • 12 inch probe length fits standard furnace and AC assemblies
  • WHITE-RODGERS branding confirms genuine Emerson Climate Technologies component

Specifications

BrandWHITE-RODGERS

Questions about this item

What voltage rating must the furnace control board supply for the WHITE-RODGERS 3L09-25 limit control to operate?

The WHITE-RODGERS 3L09-25 is a mechanical snap-disc limit control that requires no external voltage; it opens at 200°F and closes at 180°F, so the board only needs to provide a low-voltage safety circuit path.

Will the 3.12-inch probe length fit the existing bracket on my older RV furnace heat exchanger?

The 3.12-inch insertion depth matches many standard board-mount brackets; verify the original limit’s probe length and mounting hole spacing before installing the 3L09-25.

How can I confirm the WHITE-RODGERS 3L09-25 is cycling correctly after installation?

With the furnace running, measure continuity across the limit terminals; the circuit should open when the heat exchanger reaches 200°F and close again once it cools to 180°F.

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