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Small rectangular HVAC limit control, silver metal body with two terminals, opens at 200°F

Value Brand

Value Brand HVAC Control Auto Reset Opens 200°F

SKU CH-Z11Z-1EH5X

Snap-disc limit control with automatic reset that opens at 200 °F for 120–240 V HVAC circuits

  • Auto-reset prevents manual intervention after overheat
  • Opens at 200 °F to protect HVAC components
  • 160–200 °F range covers common system limits
  • 40 °F differential avoids short-cycling
  • Rated for 120–240 V AC circuits

Snap-disc limit switch for HVAC safety

This snap-disc limit control opens automatically when the temperature reaches 200 °F and resets itself once the system cools. It operates as a single-pole single-throw switch with a 40-degree differential between opening and closing points. The device is rated for 120 to 240 V circuits and suits HVAC equipment that requires a fixed high-temperature cutout.

Installers needing an automatic-reset high-limit

Technicians servicing furnaces, air handlers or other HVAC units that specify a 160 to 200 °F operating range will find this control a direct replacement. It is not suitable for systems that demand a manual-reset safety lockout, a different temperature set-point or a switching action that closes on temperature rise.

Verify voltage, temperature range and mounting

Confirm the existing circuit operates within the 120 to 240 V rating and that the equipment requires a limit that opens at 200 °F with a 40-degree differential. Check that the 1 1/4 in height and 3/4 in width and depth match the available mounting space and that the SPST switch action matches the control logic of the appliance.

Highlights

  • Auto-reset prevents manual intervention after overheat
  • Opens at 200 °F to protect HVAC components
  • 160–200 °F range covers common system limits
  • 40 °F differential avoids short-cycling
  • Rated for 120–240 V AC circuits

Specifications

BrandZORO SELECT

Questions about this item

What voltage supply does the 120 to 240 V auto-reset limit switch require to operate?

The control operates on any AC supply between 120 and 240 volts, so a standard mains circuit in that range is all that is needed.

Will the 40-degree differential of this snap-disc control work with a legacy thermostat that expects a tighter 15-degree swing?

The switch opens at 200 °F and resets at 160 °F, giving a fixed 40-degree differential that cannot be adjusted to match a 15-degree requirement.

How can I verify the SPST limit switch is opening at 200 °F and resetting at 160 °F after installation?

Heat the sensor until the circuit opens at 200 °F, then let it cool; the contacts should close again automatically once the temperature falls back to 160 °F.

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