626602 Nordyne 90–110 °F Auto-Reset Limit Switch
626602 Nordyne 90–110 °F Auto-Reset Limit Switch
Product Overview
The 626602 Nordyne Auto-Reset Limit Switch is a direct-fit OEM safety control for residential gas furnaces and air handlers. Factory-preset to open at 90 °F and automatically reset at 110 °F, it provides reliable protection against low-limit conditions (such as blocked airflow) without requiring manual intervention.
Key features:
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Auto-reset design for uninterrupted operation
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Precision bi-metal sensing element for consistent actuation
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Compact phenolic housing with snap-in mounting
Technical Specifications
| Specification | Detail |
|---|---|
| Cut-out temperature | 90 °F (± 5 °F) |
| Reset temperature | 110 °F (± 5 °F) |
| Differential | 20 °F nominal |
| Contact configuration | SPST normally closed |
| Electrical rating | 5 A @ 250 VAC (resistive) |
| Terminals | 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″ (approx.) |
| Weight | 0.05 lb (23 g) |
Cross-Reference Part Numbers
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Nordyne 626602
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Neuco 626602
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Coleman 626602
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OEM legacy: L90-20AUTO, L90-110F auto reset
Compatibility
Compatible with a wide range of single-stage residential furnaces and air handlers that require a 90 °F low-limit auto-reset switch, including:
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Nordyne & Coleman N5/N6 series
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Goodman & Amana legacy furnaces
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York & Westinghouse standard models
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Bryant & Payne residential units
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American Standard Basic Heat & Pro-Line lines
Technician Notes
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Always disconnect power and verify zero voltage before servicing.
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Locate and remove the original low-limit switch; note its clip or bracket orientation.
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Install the 626602 in the identical plenum or duct location to ensure accurate temperature sensing.
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Confirm terminal seating and torque spade connections per spec to avoid arcing.
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After installation, restore power and allow normal cycling; the switch should stay closed under proper airflow and open only if the plenum temperature falls to 90 °F.
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Carry a spare 626602 and mounting clip for rapid field replacement.
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Consider bundling with airflow filters and blower wheel inspections to prevent recurring low-limit trips.