626612R Nordyne Limit Switch L165-30F
Product Overview
L165-30F Nordyne limit switch 626612R is an OEM high-limit safety control designed to protect gas furnaces and air handlers from overtemperature conditions. The SPST normally-closed contact opens when internal heat exchanger temperatures exceed 165 °F, interrupting power to burners or blowers. Once the unit cools below its reset point, the switch automatically recloses—ensuring reliable, repeat-cycle protection without manual intervention.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 626612R |
| Model | L165-30F |
| Function | Automatic-reset high-limit safety switch |
| Trip Temperature | 165 °F ± 5 °F |
| Reset Temperature | 135 °F ± 5 °F |
| Contact Configuration | SPST normally closed |
| Terminal Connections | Two 1/4″ male quick-connect spades |
| Mounting | Snap-in chassis-mount clip |
| Bulb Size | N/A (non-bulb style board-mount design) |
| Housing Material | High-temperature phenolic/thermoplastic |
| Operating Ambient Range | 32 °F to 175 °F |
Cross-Reference Part Numbers
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Nordyne OEM: 626612R
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Nordyne variation/SKU: 626561
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Nordyne (manufacturer): 626612
Compatibility
Fits Nordyne, Nordyne Miller, Intertherm, Coleman, Amana, and private-label furnaces or air handlers originally equipped with an L165-30F automatic-reset limit control. Always verify your furnace data-plate or service manual for the exact limit-switch designation before ordering.
Technician Notes
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De-energize the furnace at the service disconnect and shut off the gas supply before servicing.
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Remove the access panel to expose the existing high-limit switch on the heat exchanger or plenum.
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Photograph or label the two quick-connect terminals to preserve wiring orientation.
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Press the snap-in clip or depress mounting tabs to unlock and remove the old switch; pull off spade connectors.
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Align and snap the new 626612R into the bracket until it clicks firmly.
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Reconnect the spade leads to their original terminals, ensuring full engagement on each lug.
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Restore power and initiate a heat call; confirm blower or burner circuits de-energize at approximately 165 °F and re-energize near 135 °F.
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If nuisance trips occur, inspect airflow pathways for blockages, verify inducer and blower operation, and confirm thermostat and filter condition before retesting.