Reznor 197078 Flow Switch 30067439-890 the internal windings may be

the internal windings may be compromised

the adapter breaks the millivolt signal to the gas valve's power unit

it ensures consistent performance in high-duty cycle applications like chillers and heat pumps

When troubleshooting oil burner transformer failure

This high-temperature boiler sight glass resists the etching and clouding common in older natural gas units

Reznor 197078 Flow Switch 30067439-890 the internal windings may beAs a veteran technician, you know that a failing pressure switch quickly shuts down a job site. The Reznor 197078 Air Flow Switch is the primary safety mechanism for ensuring proper draft and venting before the burner cycle begins. This genuine OEM part is engineered with a specific 0. 80 IN WC set point, calibrated to the rigorous tolerances required for Reznor UDX, UDZ, and older unit heaters. Operating as an SPST contact type (Single Pole Single