121275 Heater Safety Blocked Vent Limit Switch L275F Compatible with Reznor Gas Unit & Waste Oil Heaters
Product details
| Management number | 211070108 | Release Date | 2026/04/04 | List Price | $12.80 | Model Number | 211070108 | ||
|---|---|---|---|---|---|---|---|---|---|
| Category | |||||||||
The 121275 is a versatile normally closed safety thermostat designed exclusively for 2 Reznor heater types: gas unit heaters and waste oil heaters. It serves as a critical overheat protector—remaining closed during normal operation, triggering at 275F to shut off power when vents or flues are blocked, and requiring manual reset after cooling to prevent unsafe restarts. For Reznor Gas Unit Heaters (F-series): Fits models F75, F100, F125, F165, F200, F250, F300, F400 — ideal for warehouses, workshops, and industrial spaces relying on forced-air heating. For Reznor Waste Oil Heaters: Compatible with RA 140/235/350/500, RAD 140/235/350/500, and Venturion 225/325 — perfect for facilities recycling waste oil for cost-effective heating. It integrates seamlessly into both heater safety circuits, no extra modifications needed. For safety: Always disconnect power before setup and wear insulated gloves. Double-check your heater’s type and model to ensure a proper fit. Package includes: 1 x 121275 Heater Safety Switch (NC, 275F Manual Reset).
- Manual Reset Overheat Protection：Normally closed design trips at 275°F to shut off power during vent blockage；requires manual reset after cooling for safe dual-scene operation
- Gas Unit Heater Fit：Compatible with Reznor F-series (F75/F100-F400) to guard against blocked vent overheating
- Waste Oil Heater Compatibility：Compatible with RA/RAD 140-500 & Venturion 225/325 for flue blockage safety control
- Critical Safety Instructions：Disconnect heater power before installation; wear insulated gloves to avoid hazards
- Confirm Model Details：Verify your Reznor heater type (gas unit/waste oil) & exact model prior to purchase
| Color | Black |
|---|---|
| Model | 121275 |
| Terminal | Spade |
| Brand Name | HAINEAO |
| Unit Count | 1.0 Count |
| Switch Type | IGBT |
| Circuit Type | 1-way |
| Contact Type | Normally Closed |
| Manufacturer | HAINEAO |
| Material Type | Metal |
| Mounting Type | Surface Mount |
| Connector Type | Clamp |
| Current Rating | 16 Amps |
| Operation Mode | ON-OFF-ON |
| Item Dimensions | 2 x 1.5 x 0.72 inches |
| Number of Items | 1 |
| Contact Material | Brass |
| Operating Voltage | 120 Volts |
| Specification Met | RoHS |
| Included Components | 121275 Heater Safety Blocked Vent Limit Switch |
| Number of Positions | 2 |
| Upper Temperature Rating | 275 Degrees Fahrenheit |
| International Protection Rating | IP00 |
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