Description
The Carrier HH18HA195 is an OEM replacement limit switch engineered to protect furnace heat exchangers and components from dangerous overtemperature conditions. Featuring a 195°F trip point and a manual reset mechanism, this limit switch provides a reliable last line of defense against furnace overheating — requiring a deliberate technician reset before the system can resume operation, ensuring the root cause of the fault is addressed before restart.
Key Features
- 195°F (90.6°C) trip temperature for precise high-limit protection
- Manual reset design requires intentional technician intervention before resuming operation
- OEM Carrier replacement part — direct-fit for compatible Carrier furnace models
- Helps prevent heat exchanger damage, component failure, and fire hazards caused by overheating
- Durable construction built to withstand the demands of residential and light commercial heating applications
How It Works
The limit switch continuously monitors the temperature inside the furnace plenum or heat exchanger area. If temperatures rise above the 195°F set point — due to restricted airflow, a dirty filter, blower failure, or other fault conditions — the switch opens the control circuit, shutting down the burner. Because this is a manual reset model, the switch must be physically reset on-site, prompting a full inspection before the system is returned to service.
Application
- Replacement limit switch for compatible Carrier furnaces
- Ideal for residential and light commercial forced-air heating systems
- Suitable for use by licensed HVAC technicians and qualified service professionals
Specifications
- Brand: Carrier
- Part Number: HH18HA195
- Trip Temperature: 195°F
- Reset Type: Manual Reset
- Application: Furnace High-Limit Protection
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