Description
The Carrier HH12ZA211 is an OEM automatic-reset limit switch engineered to protect furnaces and air handlers from dangerous overheating conditions. When supply-air temperatures exceed the set 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.
Key Features
- Automatic reset operation — restores normal function once temperatures drop to a safe range, no manual intervention required
- 170–210°F operating temperature range for precise high-limit protection
- OEM Carrier replacement part — engineered to factory specifications for reliable, drop-in compatibility
- Opens the control circuit on high-temperature fault to shut down burner and prevent heat exchanger damage
- Compact, durable construction designed for long service life in residential and light-commercial furnace applications
Product Specifications
- Brand: Carrier
- Part Number / SKU: HH12ZA211
- Switch Type: Automatic Reset Limit Switch
- Temperature Range: 170–210°F
- Application: Furnace / Air Handler High-Limit Protection
Application
Designed as a direct OEM replacement for Carrier furnaces and air-handling equipment, the HH12ZA211 limit switch is a critical safety component that guards against overheating caused by restricted airflow, dirty filters, or blower failure. Always verify compatibility with your specific Carrier model before installation.
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