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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.

How it compares

Measured against everything we stock in Fans, Vents & Climate Control, at today’s prices. Recalculated every night.

Price $12.99
Cheaper than about 92% of the 328 comparable items (median $68.99).

Specifications

Product
Brand nameWHITE-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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