providing a reliable automatic changeover when the media temperature shifts between heating and cooling cycles

Can I use this for the 70-21859-06

2" WC for high fire and approximately 1

This unit features thermal protection to prevent winding failure during heavy-cycle operation in demanding hydronic heating environments

The internal mesh strainer provides essential debris protection

Fenwal 35-703920-009 Board R-410A providing a reliable automatic changeoverAs a technician, you know that intermittent ignition failures are usually traced back to a failing control module. The Fenwal 35 703920 009 Ignition Control Board is a specialized 120V DSI (Direct Spark Ignition) module engineered for precision timing and flame monitoring in residential and commercial atmospheres. This Fenwal 35 70 series control utilizes a microprocessor to provide constant self diagnostics and safe start checks, ensuring the gas