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White Rodgers 3L02-200 snap disc limit control thermostat, manual reset, 200°F 93°C cut-out

Emerson Climate Technologies

Emerson Climate Technologies Snap Disc Limit Control Manual Reset 200°F (93°C) Thermostat

SKU CH-96F1-42RZ4

A high-limit safety thermostat accessory that opens on temperature rise at 200°F (93°C) and requires manual reset

  • TypeThermostat Accessories
  • Manual reset prevents automatic restart after over-temperature
  • Opens on temperature rise to cut power at 200°F
  • 93°C cut-out protects equipment from dangerous overheating
  • Designed for high-limit safety control in HVAC systems
  • White Rodgers 3L02-200 snap-disc mechanism ensures reliable operation

High-limit safety thermostat

The Emerson Climate Technologies Snap Disc Limit Control is a manual-reset thermostat accessory built for high-limit safety regulation. It opens on temperature rise at a cut-out of 200 °F (93 °C) and requires a manual reset before the circuit can close again. This device is intended for HVAC technicians and maintenance personnel who need a reliable over-temperature safeguard in heating equipment.

Suits fixed high-limit points

The control suits installations where a single, non-adjustable trip temperature of 200 °F is specified by the equipment manufacturer. It is not for applications that require an automatic reset, an adjustable set-point or a lower cut-out temperature. Buyers needing multiple trip points or a self-resetting limit should look at a different control strategy.

Simple two-wire mounting

Installation consists of wiring the two terminals into the safety circuit and securing the snap-disc body to the designated mounting surface on the appliance. The most common error is forgetting to press the manual reset button after the first over-temperature event, which leaves the circuit open. Verify the reset action during commissioning to avoid a no-heat call.

Highlights

  • Manual reset prevents automatic restart after over-temperature
  • Opens on temperature rise to cut power at 200°F
  • 93°C cut-out protects equipment from dangerous overheating
  • Designed for high-limit safety control in HVAC systems
  • White Rodgers 3L02-200 snap-disc mechanism ensures reliable operation

Specifications

BrandEmerson
TypeThermostat Accessories

Questions about this item

What voltage circuit must my HVAC system use for this 200°F limit control to operate safely?

The snap-disc limit control is a passive mechanical switch; it simply opens or closes the control circuit you connect it to, so the system voltage must match the coil or load you are switching — verify that rating on your equipment nameplate before wiring.

Will this manual-reset thermostat work alongside an existing auto-reset high-limit switch in the same furnace?

Yes — it can be wired in series with an auto-reset switch to provide a second, manual-reset safety layer; both must be rated for the same control voltage and the combined cut-out temperatures must satisfy the appliance manufacturer’s safety chain.

How can I confirm the control has actually tripped at 200°F after installation?

After the appliance reaches the cut-out temperature, the disc opens the circuit and the reset button pops out; press the button firmly — if it stays depressed and the appliance restarts, the control functioned correctly at 200°F (93°C).

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