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Navien Tankless Water Heaters 30002577A High Limit Switch

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Special Price $7.20 Regular Price $9.72
In stock
SKU
30002577A
The Navien Tankless Water Heaters 30002577A High Limit Switch is an essential safety device for your Navien Tankless Water Heaterstankless water heater. The cooling function of this part plays the role of a backup protection system against overheat of the electric motor. This switch regulates the water temperature inside the unit and turns off the power to the burner when the temperature goes high. This critical intervention protects your water heater against likely breakdown and ensures sustainable, safe use. It is a 1-way limit switch designed to provide a basic yet efficient solution.
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High-Limit Switches, HVAC Controls & Electrical
Manufacturer:
https://www.partshnc.com/media/catalog/product/3/0/30002577a.jpg

Specifications

  • Weight: 0.13lbs
  • Type: High Limit Switch
  • Switch Type: Limit Switch
  • Circuit Type: 1-way
Manufacturer Name: NAVIEN TANKLESS WATER HEATERS
Product Number: 30002577A
OEM Part Number: 30002577A
Product Description: High Limit Switch
Weight:0.13lbs/58.97g

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Product Questions (2)
Customer Questions
What maintenance is required for the NAVIEN 30002577A High Limit Switch?

Inspect the high limit switch periodically for proper electrical connections and signs of overheating or corrosion. Ensure the surrounding area is clean and free of dust buildup. Regular checks maintains safe temperature cutoff performance and prevent unexpected system shutdowns or overheating risks.

What are common issues with the NAVIEN 30002577A High Limit Switch?

  • False tripping due to temperature sensing faults or calibration drift.
  • Open or short circuit caused by wiring damage or loose terminals.
  • Overheating shutdowns triggered by defective switch response or poor contact.
  • Intermittent operation from corrosion or internal component failure.

Installation Steps

Step 1: Turn off power and gas supply to avoid shock or burns carefully.

Step 2: Remove access panel and locate existing high limit switch wiring.

Step 3: Disconnect wiring noting terminal positions, then remove faulty switch carefully.

Step 4: Install new switch, secure mounting and reconnect wiring to original terminals.

Step 5: Reassemble panel, restore power and test system for proper operation.