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Lochinvar & A.O. Smith 100338900 ON/OFF Switch

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1  Review Add Your Review
Special Price $59.28 Regular Price $68.17
In stock
SKU
100338900
The Lochinvar & A.O. Smith 100338900 ON/OFF Switch is used to control an electrical component used to control the connection of electrical power to the HVAC systems. It is mounted on the control panel or the electrical housing, and in a switching arrangement of standard control voltage circuits, the switch closes electrical contacts or opens them. The position is adjusted to allow or stop the flow of current. It is a switching motion that allows the startup and shutdown of controlled equipment and allows proper continuity of circuits, facilitating safe operation and dependable power management in the heating system.
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HVAC Controls & Electrical, Switches,
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Product Questions (2)
Customer Questions
What maintenance is required for the Lochinvar & A.O. Smith 100338900 Switch?

Periodically inspect the switch for signs of wear, corrosion, or loose connections to ensure accurate operation. Keep the switch clean and free from dust or moisture buildup. Verify proper electrical contact and secure mounting. Always turn off power before handling to prevent electrical hazards.

What are common issues with the Lochinvar & A.O. Smith 100338900 Switch?

  • Intermittent electrical connection.
  • Loose or damaged terminals.
  • Physical wear causing sticking or resistance.
  • Electrical arcing or sparking during use.

Installation Steps

Step 1: Turn off all electrical power to the unit and verify no voltage is present for safety.

Step 2: Remove access panel to reach the existing switch assembly location.

Step 3: Disconnect wiring from the old switch, noting terminal positions carefully.

Step 4: Install the new switch securely into the mounting position and reconnect wires to matching terminals.

Step 5: Restore power and test switch operation to confirm proper unit start and stop control.