Description
The Lochinvar & A.O. Smith 100208391 is an OEM replacement air pressure switch engineered to maintain safe and efficient operation in compatible Lochinvar and A.O. Smith heating equipment. Air pressure switches play a critical role in the combustion safety circuit — verifying that the draft inducer or combustion air blower is operating at the correct pressure differential before allowing the ignition sequence to proceed. This helps protect the heat exchanger, prevent unsafe combustion conditions, and ensure the appliance meets manufacturer performance standards.
Key Features
- OEM replacement part for compatible Lochinvar and A.O. Smith heating equipment
- Monitors combustion air pressure to confirm proper draft inducer operation
- Prevents ignition sequence from initiating under unsafe pressure conditions
- Designed for direct, drop-in replacement — no modifications required
- Helps maintain equipment efficiency, safety, and warranty compliance
Application
- Compatible with select Lochinvar and A.O. Smith boilers and water heaters
- Part of the combustion safety control circuit
- Recommended for use by qualified HVAC/R and plumbing technicians
Why Choose OEM Parts?
Using genuine OEM replacement components like the 100208391 ensures your equipment operates as designed, preserves manufacturer warranties, and reduces the risk of callbacks or premature failures. Always verify compatibility with your specific model before installation.
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