Manufacturer Name: Honeywell Product Number: ET401A1 OEM Part Number: ET401A1 The Honeywell ET401A1 ignition transformer is an essential component of many gas-powered HVAC systems. It transforms an ordinary 110V input into a high-voltage spark, usually at 14,000 volts. The heating process is then started by lighting the gas burner with this spark. This transformer is found in boi... https://www.partshnc.com/ignitiontransformer110v-2