Description
The Carrier HH18HA194 is a manual reset limit switch engineered to protect furnaces and heating systems from dangerous overheating conditions. Designed as a genuine Carrier OEM replacement component, this limit switch monitors supply air or heat exchanger temperatures and opens the circuit when temperatures exceed the safe operating threshold — helping prevent equipment damage and ensuring safe system operation.
Key Features
- Genuine Carrier OEM replacement limit switch
- Operating temperature range: 140°F to 180°F
- Manual reset design requires deliberate technician intervention before the system can restart — helping identify and address the root cause of overheating
- Provides critical overheat protection for furnaces and air handling equipment
- Direct OEM replacement for compatible Carrier heating systems
Why Manual Reset?
Unlike automatic reset limit switches, a manual reset switch will not allow the system to restart on its own after a high-temperature trip. This safety feature ensures a qualified technician inspects and resolves the underlying cause — such as a dirty filter, blocked airflow, or a failing blower — before the system is returned to service.
Application
- Carrier residential and light commercial furnaces
- Replacement of failed or tripped OEM limit switches
- Preventive maintenance and service upgrades
Specifications
- SKU: HH18HA194
- Brand: Carrier
- Type: Limit Switch
- Reset Type: Manual Reset
- Temperature Range: 140°F – 180°F
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