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Supco SLP5090 Low Pressure Switch 50 Open PSI (CUT-OUT) 90 Close PSI (CUT-IN)

Special Price $20.66 Regular Price $26.86
In stock
SKU
SLP5090
The Supco SLP5090 Low-Pressure Switch is used to check and regulate the pressure in refrigeration and HVAC systems. It shuts off at 50 PSI to prevent the system from operating at low pressures and opens at 90 PSI to start normal operation. It is normally mounted on the low-pressure side of compressors or refrigeration circuits to prevent damage to compressors and evaporators due to a lack of pressure or flow of refrigerant. This switch is a vital, secure and control component that is used to maintain system performance, operational stability and equipment in residential, commercial, and industrial HVAC systems.
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Manufacturer Name: Supco
Product Number: SLP5090
OEM Part Number: SLP5090
Product Description: 50#Co 90#Ci Low Press Switch
Weight:0.14lbs/63.5g

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Customer Questions
What maintenance is required for the Supco SLP5090 Pressure Switch?

Regularly inspect the pressure switch for secure wiring connections and signs of wear or corrosion. Verify proper pressure settings and ensure the sensing line is free from blockages. Keeping the unit clean and dry helps maintain accurate operation and prevents electrical issues.

What are common issues with the Supco SLP5090 Pressure Switch?

  • Electrical contact failure or intermittent switching.
  • Blocked or leaking pressure sensing line.
  • Failure to open or close under low-pressure conditions.
  • Wiring connection faults causing inconsistent operation.

Installation Steps

Step 1: Disconnect electrical power and recover refrigerant pressure if required before servicing.

Step 2: Remove existing switch and label wiring connections for correct reconnection.

Step 3: Mount new switch on designated port and secure fittings firmly without overtightening.

Step 4: Reconnect wiring exactly as marked and check tight electrical contacts.

Step 5: Restore system power, check cut-in/cut-out operation, and confirm proper pressure response.