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Carrier HH19ZA140 Auto Limit Switch L140F-40F

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5 5 1
1  Review Add Your Review
Special Price $32.90 Regular Price $36.58
In stock
SKU
HH19ZA140
The Carrier HH19ZA140 Auto Limit Switch L140F-40F provides overheating protection to the operation of furnaces and air handlers, and thermal control. It is a temperature-sensitive component that measures the amount of heat inside the system and is typically fitted in the HVAC Systems to ensure the equipment operates within acceptable operating temperatures and does not get damaged. Includes the opening of the electrical circuit by the switch when the temperature is than normal and closing the circuit automatically when the conditions are normal. This involves the convenience of an automatic reset of the system.
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HVAC Controls & Electrical, Safety & Limit Devices
Manufacturer:
https://www.partshnc.com/media/catalog/product/h/h/hh19za140.jpg
Manufacturer Name: Carrier
Product Number: HH19ZA140
OEM Part Number: HH19ZA140
Product Description: L140-40F Auto Limit Switch
Weight:0.07lbs/31.75g

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Product Questions (2)
Customer Questions
What maintenance is required for the Carrier HH19ZA140 Auto Limit Switch?

Inspect contacts and wiring for damage or looseness. Clean dust and debris to ensure accurate tripping and accurate operation. Isolate power before servicing to prevent electrical hazards and ensure safety.

What are common issues with the Carrier HH19ZA140 Auto Limit Switch?

  • Contact wear causing intermittent switching failures.
  • Loose or damaged wiring leading to false signals.
  • Dust or debris buildup affecting switch sensitivity.
  • Misalignment preventing proper activation of the limit operation.
  • Corrosion on terminals causing unstable or inconsistent operation.

Installation Steps

Step 1: Turn off power to HVAC system at breaker for safety.

Step 2: Remove access panel carefully using proper tool.

Step 3: Locate old limit switch inside furnace housing or blower area.

Step 4: Disconnect wiring noting terminal positions before removal.

Step 5: Remove and replace switch in same position securely aligned.

Step 6: Reconnect wires securely and tighten all connections firmly.

Step 7: Restore power and test operation for safe function check.