Aprilaire #4740 Relay for 700A / 700M Humidifiers.

  • Fits Aprilaire models 700, 700A & 700M manufactured starting in 2008.
  • Models made before 2008 use part 4238.
  • Fan Relay that powers up the circulator fan.
Retail: $19.23
Price: $13.99
Availability: In Stock
Usually ships In 1-2 Business Days
You Save: $5.24 (27.2%)
    Points to Purchase:1399

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    Number of questions: 0