mismatched fan speeds or underpowered alternatives

always ensure your control air is clean

The Lennox 23J28 Mounting Bracket is a critical OEM replacement part engineered specifically for direct-drive blower motors in high-performance HVAC systems

For contractors managing large-scale maintenance

Engineered for heavy-duty HVAC applications

Lochinvar & A.O. Smith 100208661 Flow Switch 321894-706 mismatched fan speeds or underpoweredThe Lochinvar & A. O. Smith 100208661 Flow Switch, also identified by part number 781621 or alias FS8 W, is a heavy duty liquid flow switch engineered for precise proof of flow detection in high efficiency commercial boiler systems and water heaters. Designed as a direct HVAC replacement part for the McDonnell & Miller FS8 W, this unit features a durable stainless steel #3 paddle configuration to ensure reliable contact closure once the system pump