626508R Nordyne Auto-Reset Limit Switch L250-40 (210–250 °F)
626508R Nordyne Auto-Reset Limit Switch L250-40 (210–250 °F)
Product Overview
The 626508R Nordyne auto-reset limit switch safeguards residential gas furnaces and air handlers by interrupting the burner circuit if plenum temperatures exceed safe operating limits. Factory-set to open at 250 °F and automatically reset at 210 °F, it restores normal operation without manual intervention once temperatures fall back to the safe range.
Technical Specifications
| Specification | Detail |
|---|---|
| Cut-out temperature | 250 °F (± 5 °F) |
| Reset temperature | 210 °F (± 5 °F) |
| Differential | 40 °F nominal |
| Contact configuration | SPST normally closed |
| Electrical rating | 5 A @ 250 VAC (resistive) |
| Terminal type | ¼″ quick-connect spade |
| Housing material | High-temperature phenolic |
| Mounting style | Snap-in or screw retention |
| Dimensions (L × W × H) | 1.25″ × 1.25″ × 0.75″ |
| Weight | 0.05 lb (23 g) |
Cross-Reference Part Numbers
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Nordyne 626508R
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Neuco 626508R
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Coleman 626508R
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OEM equivalent L250-40 Auto-Reset
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Legacy designation L250-40F
Compatibility
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Nordyne/Coleman N5, N6, P5 and P6 furnaces
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Goodman and Amana legacy single-stage units
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York and Westinghouse standard-capacity furnaces
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Bryant and Payne basic heat models
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American Standard Basic Heat and Pro-Line series
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Any HVAC control panel requiring a 250 °F auto-reset limit switch
Technician Notes
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Always disconnect all power and verify zero voltage before servicing.
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Remove the original limit switch and note its mounting orientation and clip location.
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Install the 626508R in the identical position to maintain accurate temperature sensing.
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Ensure spade terminals are fully seated and torque screws to prevent arcing.
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After installation, restore power and observe a normal heat cycle—switch should open at 250 °F and reset at 210 °F.
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Carry a spare 626508R and standard quick-connect terminals for rapid field replacement.
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Bundle with furnace fan relays and rollout switches to create comprehensive safety-kit offerings.