![Lennox 78W57 Pressure Switch, .27 in. WC — New England Supply House spec card [NESH-SPEC-CARD-V2]](http://newenglandsupplyhouse.com/cdn/shop/files/nesh-78w57-card.png?v=1794090022&width=1946)
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Lennox 78W57 Pressure Switch, .27 in. WC
Lennox 78W57 Pressure Switch, .27 in. WC
Regular price
$311.36 USD
Regular price
Sale price
$311.36 USD
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Low stock: 4 left
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SKU:78W57
View full details![Lennox 78W57 Pressure Switch, .27 in. WC — New England Supply House spec card [NESH-SPEC-CARD-V2]](http://newenglandsupplyhouse.com/cdn/shop/files/nesh-78w57-card.png?v=1794090022&width=1445)
![Lennox 78W57 Pressure Switch, .27 in. WC specifications — New England Supply House [NESH-SPECTABLE-V1]](http://newenglandsupplyhouse.com/cdn/shop/files/nesh-78w57-specs.png?v=1794090023&width=1445)
The Lennox 78W57 is an SPST pressure switch rated at .27 in. WC. It monitors draft pressure in the furnace venting system, confirming the inducer is operating correctly before allowing ignition. It is a genuine Lennox replacement part. Confirm this part number against your equipment's parts list before ordering.
Specifications
| Part Number | 78W57 |
|---|---|
| Brand | Lennox |
| Type | Pressure Switch |
| Pressure Rating | .27 in. WC |
| Switch Type | SPST |