Description
Carrier HH19ZA155 Limit Switch Overview
The Carrier HH19ZA155 is an OEM replacement limit switch engineered to protect furnaces and heating systems from dangerous overheating conditions. With a precise open setpoint of 155°F and a close setpoint of 115°F, this switch automatically interrupts the burner circuit when supply air temperatures exceed safe operating thresholds — then resets automatically once temperatures return to normal.
Key Features
- Opens (trips) at 155°F to shut down burner on high-temperature fault
- Closes (resets) at 115°F once safe operating temperature is restored
- Direct OEM replacement for compatible Carrier furnace models
- Provides reliable overheat protection to safeguard heat exchangers and system components
- Designed for straightforward drop-in installation with no modifications required
Application
The HH19ZA155 limit switch is a critical safety component used in Carrier gas furnaces and air handlers. It monitors supply air or heat exchanger temperatures and interrupts the burner gas valve circuit if temperatures rise beyond the rated open setpoint, preventing heat exchanger damage, nuisance shutdowns, and potential fire hazards. Always verify compatibility with your specific Carrier model before installation.
Specifications
- SKU: HH19ZA155
- Brand: Carrier
- Open Setpoint: 155°F
- Close Setpoint: 115°F
- Type: Auto-reset Limit Switch
- Application: Furnace / Heating System Overheat Protection
Reviews
There are no reviews yet.