![Lennox 10M66 Limit Switch, 220°F — New England Supply House spec card [NESH-SPEC-CARD-V2]](http://newenglandsupplyhouse.com/cdn/shop/files/nesh-10m66-card.png?v=1794100798&width=1946)
![Lennox 10M66 Limit Switch, 220°F specifications — New England Supply House [NESH-SPECTABLE-V1]](http://newenglandsupplyhouse.com/cdn/shop/files/nesh-10m66-specs.png?v=1794100798&width=1946)
Lennox 10M66 Limit Switch, 220°F
Lennox 10M66 Limit Switch, 220°F
Regular price
$13.62 USD
Regular price
Sale price
$13.62 USD
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Low stock: 1 left
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SKU:10M66
View full details![Lennox 10M66 Limit Switch, 220°F — New England Supply House spec card [NESH-SPEC-CARD-V2]](http://newenglandsupplyhouse.com/cdn/shop/files/nesh-10m66-card.png?v=1794100798&width=1445)
![Lennox 10M66 Limit Switch, 220°F specifications — New England Supply House [NESH-SPECTABLE-V1]](http://newenglandsupplyhouse.com/cdn/shop/files/nesh-10m66-specs.png?v=1794100798&width=1445)
The Lennox 10M66 is a limit switch that monitors furnace plenum temperature, opening at 220°F with a 40°F differential to shut off the burner and protect the heat exchanger from overheating, then resetting as the unit cools. This is a genuine Lennox replacement part.
Confirm this part number matches your equipment's parts list before ordering.
Specifications
| Part Number | 10M66 |
|---|---|
| Brand | Lennox |
| Type | Limit Switch |
| Opens At | 220°F |
| Differential | 40°F |