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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.

How it compares

Measured against everything we stock in Heating & Cooling Controllers, at today’s prices. Recalculated every night.

Price $3.99
Cheaper than about 96% of the 1,762 comparable items (median $45.99).

Specifications

Product
Brand nameZORO 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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