Description
commercial building HVAC systems
atmospheric boilers
299-inch inside diameter is specifically toleranced for thermal bulb responsiveness
Port B is typically the normally closed port when the motor is de-energized
Universal Replacement: Direct 1:1 replacement for the Honeywell ST9103A1028 electronic fan timer
Lochinvar & A.O. Smith 100109721 Upper Probe 320735-701 commercial building HVAC systemsThe Lochinvar & A. O. Smith 100109721 Upper Probe is a critical OEM replacement part engineered for the inner control assembly of high efficiency commercial water heaters. As a high performance hot surface igniter, this 100109721 probe is essential for ensuring reliable ignition cycles and precise flame sensing in BTH Series units. Designed to meet exact factory specifications, it eliminates the common failure points associated with generic
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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