| Management number | 220393469 | Release Date | 2026/05/03 | List Price | $22.00 | Model Number | 220393469 | ||
|---|---|---|---|---|---|---|---|---|---|
| Category | |||||||||
This furnace limit switch is engineered to deliver reliable thermal protection and seamless integration into residential heating systems. Acting as a critical safety component, it monitors furnace temperature and automatically disconnects the burner when unsafe heat levels are detected, preventing equipment damage and mitigating fire risks. The switch’s precision calibration ensures consistent performance across varying operating conditions, restoring optimal safety to aging or faulty furnaces. Crafted for universal compatibility, it replaces worn-out switches in most gas, electric, or oil-based systems. The compact yet rugged construction utilizes heat-resistant alloys and ceramics to withstand temperatures exceeding standard operational limits, ensuring longevity even in high-stress environments. Installation is streamlined for DIY efficiency: disconnect the existing wiring, remove the mounting screws, align the new switch, and reconnect the terminals—typically completed within minutes. The hermetically sealed design prevents dust infiltration and moisture damage, reducing maintenance needs. Homeowners will appreciate its role in eliminating erratic shutdowns, uneven heating, or burner failure caused by degraded switches. For HVAC technicians, it offers a cost-effective solution to extend furnace lifespan without full system replacements. This component is indispensable for maintaining safe, efficient home heating—ideal for those prioritizing system reliability and proactive hazard prevention.HH12ZB174 HH12ZA174A HH12ZA210 HH12ZA210A HH12ZB170 HH12ZB175 P331-2203 HH12ZA221 HH12ZA221A 1NT23L-3649 P331-2205 1NT23L-3645 1NT23L-3648 P331-2206 P331-2204 1NT23L-3644 HH12ZA219 HH12ZA219AHH12ZA193 HH12ZA193A HH12ZA190 HH12ZA190A HH12ZA230 HH12ZA230AHH12ZB176 HH12ZB176A HH12ZB173
| Model | HH12ZA189 |
|---|---|
| Terminal | Blade |
| Brand Name | Generic |
| Part Number | HH12ZA189 |
| Switch Type | Bipolar Transistor |
| Circuit Type | 1-way |
| Contact Type | Normally Closed |
| Manufacturer | Generic |
| Material Type | Acrylonitrile Butadiene Styrene |
| Mounting Type | DIN Rail Mount |
| Connector Type | Clamp |
| Current Rating | 0.01 Amps |
| Operation Mode | OFF-NONE-ON |
| Item Dimensions | 0.01 x 0.01 x 0.01 inches |
| Number of Items | 1 |
| Contact Material | Aluminum |
| Operating Voltage | 0.01 Volts |
| Specification Met | ANSI C-73 |
| Included Components | HH12ZA189 Furnace Limit Switch |
| Number of Positions | 1 |
| Warranty Description | 30 days warranty |
| Lower Temperature Rating | 0.01 Degrees Celsius |
| Upper Temperature Rating | 0.01 Degrees Celsius |
| International Protection Rating | IP00 |
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