Rheem 47-100543-03 Low Pressure Limit Switch

Product Description

The RHEEM 47-100543-03 is an OEM low pressure limit switch with auto reset, designed for use in Rheem HVAC equipment. A low pressure limit switch monitors system pressure and interrupts the control circuit when pressure drops below a safe operating threshold. The auto reset function allows the switch to restore normal operation automatically once pressure returns to an acceptable level, without requiring manual intervention. This part is installed by licensed HVAC technicians as part of routine service or component replacement on Rheem heating and cooling systems.

This switch is suited for residential and light commercial HVAC applications where pressure monitoring is a critical safety and operational function. It is an OEM-specified component, meaning it is manufactured to the original design standards for the equipment it serves. Technicians replacing a failed or out-of-spec pressure limit switch will find this part a direct fit for compatible Rheem systems.

Key Features

• OEM replacement part sourced directly from Rheem
• Auto reset function restores operation without manual reset after pressure normalizes
• Monitors low pressure conditions to protect system components from damage
• Built to original manufacturer specifications for reliable fitment and performance

Compatibility

Designed as an OEM-style replacement low pressure limit switch for compatible Rheem HVAC equipment. Refer to your equipment service manual or the Rheem parts lookup tool to confirm fitment for your specific model.

Installation Notes

Installation should be performed by a licensed HVAC technician. Before servicing, shut off all electrical power to the unit at the disconnect and follow any applicable refrigerant handling requirements per EPA Section 608 regulations. Do not bypass or jumper a pressure limit switch as a diagnostic shortcut during servicing. Verify system pressures are within normal operating range before returning the equipment to service.