Allanson Transformers 421-659 Transformer Els PW 17895 Replacing a faulty 120-20 limit

Replacing a faulty 120-20 limit switch is essential for restoring proper HVAC system diagnostics and ensuring the blower motor cycles correctly

trip point prevents nuisance tripping while ensuring safe combustion

Key Benefits Direct Cross-Reference: Engineered as a drop-in replacement for AKS-6261

Noise Reduction: Effectively eliminates the "whooshing" or air whistling common in zoned ductwork when only the smallest zone is calling

Pressure switches are calibrated for specific inducer and heat exchanger combinations

Allanson Transformers 421-659 Transformer Els PW 17895 Replacing a faulty 120-20 limitThe Allanson 421 659 Ignition Transformer is a heavy duty power supply engineered specifically for Cleaver Brooks burners and industrial combustion systems. Designed for high demand thermal applications, this transformer operates on a 120Vac supply voltage and delivers a consistent 10,000Vac secondary voltage at 23mA. Its mid point ground configuration ensures optimal electrical stability and arc performance, reducing the risk of intermittent ignition