Description
The Carrier HH18HA192 is an OEM automatic-reset high-limit switch engineered to protect Carrier furnaces from dangerous overheating conditions. When supply-air temperatures exceed the upper threshold, the switch opens the control circuit and shuts down the burner — then automatically resets once temperatures return to a safe level, minimizing nuisance service calls while keeping the system protected.
Key Features
- Auto-reset operation — no manual intervention required after the overheat condition clears
- Trip/open temperature: 190°F
- Reset/close temperature: 140°F
- Differential: 50°F between trip and reset points
- Genuine Carrier OEM replacement part for reliable, drop-in fitment
- Protects heat exchanger and downstream components from thermal damage
- Direct replacement for compatible Carrier furnace models
Application
Designed as a direct OEM replacement limit switch for Carrier residential and light-commercial gas furnaces. Installs in the supply-air plenum or heat exchanger section to monitor discharge air temperature and interrupt the burner circuit upon an overheat event.
Specifications
- Part Number: HH18HA192
- Brand: Carrier
- Reset Type: Automatic (AUTO)
- Trip Temperature: 190°F
- Reset Temperature: 140°F
- Function: High-limit overheat protection
Reviews
There are no reviews yet.