Rcd hh12zb160 Limit Switch 3 Inches L160-40F

Product Description

The RCD hh12zb160 is a high-limit safety switch designed to protect heating equipment from overtemperature conditions. When air temperature in the heat exchanger or plenum exceeds the rated threshold, the switch opens the control circuit to shut down the burner and prevent damage or hazard. At 3 inches in length and rated at L160-40F, this limit switch opens at 160 degrees F and resets at 120 degrees F, providing a 40-degree differential. It is installed by licensed HVAC technicians during routine service or equipment replacement in gas furnace and air handler applications.

The hh12zb160 is suited for residential gas furnace installations where OEM-style high-limit protection is required. The L160-40F rating makes it appropriate for systems with a factory-specified 160-degree F cutout. Technicians replacing a failed or out-of-spec limit switch in a forced-air heating system will find this a direct-fit option for compatible Carrier-type equipment. It is commonly installed in the supply air plenum or on the heat exchanger vestibule panel.

Key Features

• Opens at 160 degrees F with a 40-degree F reset differential (L160-40F)
• 3-inch form factor fits standard furnace vestibule panel cutouts
• Normally closed contact configuration for fail-safe burner shutoff
• OEM-style replacement for gas furnace high-limit circuit protection
• Provides overtemperature protection to prevent heat exchanger damage

Compatibility

Designed as an OEM-style replacement high-limit switch for residential gas furnace applications, compatible with Carrier parts and accessories equipment requiring an L160-40F rated limit switch.

Installation Notes

Installation should be performed by a qualified HVAC technician in accordance with applicable local codes and the equipment manufacturer's service manual. Disconnect all power to the furnace and shut off the gas supply before removing or installing any limit switch. Verify the replacement switch matches the cutout temperature and reset differential of the original before energizing the system. After installation, confirm proper operation by observing system startup and verifying the limit switch does not trip under normal airflow conditions.

Technical Specifications

• Cutout Temperature: 160 degrees F
• Reset Differential: 40 degrees F
• Length: 3 inches
• Rating: L160-40F

Standard Information

• Brand: RCD
• Manufacturer Part Number: hh12zb160