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Small rectangular HVAC limit switch, metal body, two terminals, auto reset opens at 300°F

Value Brand

Value Brand HVAC Control Auto Reset Opens 300°F

SKU CH-FFGP-H1327

An automatic-reset HVAC limit switch that opens at 300 °F and resets at 260 °F, rated for 120–240 V circuits

  • Auto reset restores operation without manual intervention
  • Opens at 300 °F to protect against overheating
  • SPST switch action opens on temperature rise
  • Operates across 120 to 240 V for flexible wiring
  • 40 °F differential prevents rapid cycling

Snap Disc Limit Control

The Zoro Select snap disc control is a single-pole single-throw limit switch that opens on temperature rise and resets automatically. It operates within a 260 to 300 degrees Fahrenheit range with a 40-degree differential. The unit handles 120 to 240 volts and suits HVAC systems needing a fixed high-limit safety cutoff.

Suited for fixed high-limit safety

This control fits applications where a non-adjustable open-on-rise action at 300 degrees Fahrenheit protects equipment from overheating. It is not for systems requiring a close-on-rise function, a manual reset, an adjustable set point or a different temperature range. Buyers needing a lower opening temperature or a different switch action should look at other models.

Capacity and headroom

The switch carries up to 25 amps at 120 volts and 10 amps at 240 volts, giving 480 VA pilot duty capacity. It comfortably handles standard HVAC control circuits within the 260 to 300 degrees Fahrenheit window. The fixed 40-degree differential means the contacts will not re-close until temperature falls to approximately 260 degrees Fahrenheit.

Highlights

  • Auto reset restores operation without manual intervention
  • Opens at 300 °F to protect against overheating
  • SPST switch action opens on temperature rise
  • Operates across 120 to 240 V for flexible wiring
  • 40 °F differential prevents rapid cycling

Specifications

BrandZORO SELECT

Questions about this item

What voltage supply do I need for the 120 to 240 volt range on this control?

The snap-disc limit switch operates on any AC supply between 120 and 240 volts, so a standard household or light-commercial circuit in that range will power it.

Will the 40-degree differential cause short-cycling with a furnace that has a 25-degree rise?

The control opens at 300 °F and automatically resets at 260 °F, a 40-degree spread; a system with only a 25-degree rise will not reach the reset point, so the limit will stay open until the heat exchanger cools further.

How can I verify the switch opened at 300 °F after installation?

Use a contact thermometer on the mounting surface; when it reads 300 °F the circuit should open, and a multimeter across the SPST terminals will show infinite resistance at that moment.

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