Description
Product Summary
The Allanson 421-557 is an ignition transformer from Allanson, described by the manufacturer as: ignition transformer Arco/American standard. It replaces 421-353A 421-393 421-216 312-26ABE23.
An ignition transformer or solid-state igniter creates the high-voltage spark that lights an oil or gas burner. Replace it if the spark is weak or missing with the electrodes correctly gapped, or if the case is cracked or burnt.
Before you order, match 421-557 to the part number on the part you are replacing or in your equipment's repair parts list, and confirm the voltage, size and connections match your equipment. If you are not sure which part your equipment needs, call us at 1.888.509.3391 with the model and serial number and we will confirm it for you.
Key Features
- Genuine Allanson part: Manufacturer part number 421-557, factory new.
- Cross-reference: Replaces 421-353A 421-393 421-216 312-26ABE23.
- Part type: Ignition Transformer.
- Ready to ship: In stock with live quantities shown on this page.
Frequently Asked Questions
Is this a genuine Allanson part?
Yes. This is the Allanson 421-557, a factory-new ignition transformer from Allanson.
How do I make sure it fits my equipment?
Compare 421-557 with the part number printed on the part you are replacing or listed in your equipment's repair parts list, and confirm the voltage and connections match. If you are not sure, call us at 1.888.509.3391 with your model and serial number and we will confirm it.
What part numbers does the 421-557 replace?
The Allanson 421-557 replaces 421-353A 421-393 421-216 312-26ABE23.
Can a solid-state igniter replace an iron-core transformer?
In most cases, yes. Choose one listed for your burner model so it mounts and connects correctly.
Should a professional install this part?
Yes. Gas, electrical, hydronic and combustion components should be installed by a qualified technician who can test the system afterward and follow the codes that apply where you live.
