Allanson Transformers 421-BT636 Transformer 30067439-890 A flashing red light indicates

A flashing red light indicates the anti-short cycle timer is active

allowing it to substitute for older 370V versions while offering superior thermal stability in high-ambient environments

installing this furnace blower fan wheel restores factory-spec performance and prevents premature blower motor failure caused by unbalanced centrifugal loads

Accurate 3-15 PSI Correlation: Specifically calibrated to translate standard pneumatic signals into readable temperature data for rapid diagnostics

Built for the Field: Features clearly labeled C

Allanson Transformers 421-BT636 Transformer 30067439-890 A flashing red light indicatesThe Allanson 421 BT636 is a heavy duty universal ignition transformer designed for reliable spark ignition in industrial and residential oil burners. Engineered with a 120Vac supply voltage and a 10,000Vac secondary voltage at 23mA, this unit ensures a consistent high voltage arc for efficient combustion. Featuring a mid point ground configuration, it provides stable electrical performance and reduced electromagnetic interference. As a direct