Rcd hh12zb200 Auto Limit Switch 160-200F

Product Description

The RCD hh12zb200 is an automatic reset high-limit switch rated for a 160 to 200 degrees F operating range. Limit switches in this class monitor supply-air or heat-exchanger temperatures and open the control circuit when a set threshold is exceeded, protecting the heat exchanger and burner assembly from thermal damage. When temperatures return to a safe level, this switch resets automatically without requiring manual intervention. It is sized for residential and light-commercial forced-air furnace applications and is typically installed by licensed HVAC technicians during routine service or component replacement.

This limit switch is suited for forced-air gas furnace systems where over-temperature protection is required in the supply-air plenum or on the heat exchanger. The auto-reset function makes it appropriate for installations where nuisance manual resets would interrupt normal system cycling. It is commonly found in upflow, downflow, and horizontal furnace configurations where operating temperatures fall within the 160 to 200 degrees F range.

Key Features

• Auto-reset design returns the switch to closed position once temperatures drop to a safe level
• Operating range of 160 to 200 degrees F covers common plenum and heat-exchanger limit applications
• High-limit function opens the control circuit on over-temperature, protecting the heat exchanger from damage
• Direct OEM-style replacement format for straightforward field swap-out

Compatibility

Designed as an OEM-style replacement high-limit switch for residential and light-commercial forced-air gas furnace systems requiring a 160 to 200 degrees F auto-reset limit control.

Installation Notes

Installation should be performed by a licensed HVAC technician. Shut off all power to the furnace at the disconnect and set the thermostat to the off position before removing the existing switch. Verify the replacement limit switch mounting style and spade terminal orientation match the original before energizing the system. Always confirm the furnace cycles normally through a full heating sequence after installation to validate proper limit operation.

Technical Specifications

• Temperature Range: 160 to 200 degrees F
• Reset Type: Automatic
• Switch Function: High-limit, normally closed

Standard Information

• Brand: RCD
• Manufacturer Part Number: hh12zb200