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Honeywell ET401A1 Ignition Transformer 110V

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Special Price $123.14 Regular Price $141.61
In stock
SKU
ET401A1
The Honeywell ET401A1-Ignition Transformer is durable part that is intended for use in oil-fired burners in residential and commercial HVAC system applications. It work by transforming 110V input to a high voltage output that is required to ignite fuel effectively. This transformer also provides fast and stable ignition, improving the system efficiency and reducing the time of failure. For durability and stable running, it is safe for combustion and will also enhance the equipment’s durability. It is suitable for furnaces and boilers to ensure that burners operate as required, ensure smooth and reliable startups of the heating systems.
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HVAC Controls, Transformers
Manufacturer:
https://www.partshnc.com/media/catalog/product/e/t/et401a1.jpg

Specifications

  • Type: Ignition
  • Voltage: 110V
Manufacturer Name: Honeywell
Product Number: ET401A1
OEM Part Number: ET401A1
Product Description: Ignitiontransformer110v
Weight:1.26lbs/571.53g

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Product Questions (2)
Customer Questions
What maintenance is required for the Honeywell ET401A1 Ignition Transformer?

Periodically check the transformer housing for heat damage, cracking, or moisture ingress that could affect high-voltage output stability. Ensure mounting remains secure to avoid vibration pressure during burner operation. Inspect primary and secondary wiring for tight, corrosion-free connections so ignition performance stays consistent under load conditions.

What are common issues with the Honeywell ET401A1 Ignition Transformer?

  • No spark output due to internal coil failure.
  • Weak ignition from degraded high-voltage output.
  • Intermittent burner ignition from loose terminals.
  • Insulation breakdown leading to short cycling faults.

Installation Steps

Step 1: Turn off power and gas supply, verify zero voltage before proceeding.

Step 2: Mount transformer securely on furnace panel using brackets.

Step 3: Connect primary leads to power source per wiring diagram.

Step 4: Attach high-voltage output leads to ignition electrode.

Step 5: Ground unit properly and secure all connections.

Step 6: Restore power and test ignition cycle carefully.