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Marley Engineered Products 4520-0011-001 53.5" Auto Reset Cut-Off Limit Switch 325°F

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1  Review Add Your Review
Special Price $81.42 Regular Price $93.63
In stock
SKU
4520-0011-001
The Marley Engineered Products 4520-0011-001 53.5" Cut Off Auto Limit Switch intended for use in HVAC system, such as electric heaters, unit heaters and fan forced heaters. This switch is a safety system that cuts power off automatically if the temperature reaches 325°F to prevent overheating and possible damage. It has an extended length for versatile installation which provides efficient thermal regulation. The main benefits of system longevity, enhanced safety and increased operational reliability are associated with key factors. The auto limit switch of this kind is ideal to maintain optimal parameters like temperature and safeguard from overheating.
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HVAC Controls, HVAC Limit Switch
Manufacturer:
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Specifications

  • Type: Auto Limit
  • Function: Cut-Off
  • Length: 53.5"
  • Temperature: 325°F
Manufacturer Name: Marley Engineered Products
Product Number: 4520-0011-001
OEM Part Number: 4520-0011-001
Product Description: 325F Co Auto Limit Swt 53.5"
Weight:0.1lbs/45.36g

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Product Questions (2)
Customer Questions
What maintenance is required for the Marley Engineered Products 4520-0011-001 Cut-Off Limit Switch?

Periodically inspect the switch for dust buildup and ensure terminals are tight. Clean gently and check reset mechanism for smooth operation. Proper maintenance ensures accurate temperature cutoff and system safety in heating equipment.

What are common issues with the Marley Engineered Products 4520-0011-001 Cut-Off Limit Switch?

  • False tripping at high ambient temperatures.
  • Sticking or failure to auto reset due to worn contacts.
  • Intermittent heating shutdown caused by loose electrical connections.
  • Inaccurate cutoff response from sensor degradation.

Installation Steps

Step 1: Shut off electrical supply and confirm zero power at the equipment before starting.

Step 2: Allow the unit to cool completely to avoid heat exposure.

Step 3: Open access panel and carefully disconnect wiring from the existing switch.

Step 4: Remove the old switch and place the new switch in the same mounting position.

Step 5: Secure the switch firmly and reconnect wiring exactly as before.

Step 6: Restore power and check automatic reset operation during test cycle.