Vintage 24 volt relay transformer.

• Sears/GE 24 volt transformer 40 VA
• Part# 429211 or 4A420
• Provides automatic control of blower speeds in central air conditioning systems or furance
• Provides interlock for humidifiers and/or air cleaners on air conditioners systems
• Mounts on a 4x4 junction box

Sears/GE 24 volt transformer 40 VAUSA