Reznor 257010 Ignition Control

The Reznor 257010 Ignition Control is a critical DSI control board designed specifically for intermittent spark pilot systems requiring a 100% lockout safety sequence. Primarily utilized in Reznor F, FE, B, and BE series unit heaters, this UTEC 1003-514 module is the required replacement for units equipped with a vent damper. A key technical constraint to note: once this controller is interfaced with a vent damper via the wiring harness, the internal safety logic permanently configures the board for that application, and it will no longer function on units without a damper. This HVAC ignition module provides a robust 0.2 microamp minimum flame-proving signal to ensure stable operation and includes a 60-minute retry delay after a lockout event.

For technicians performing a retrofit, the 257010 serves as a direct replacement for obsolete part numbers 89488 and 89314. When upgrading from these older versions, the Rajah connector on the existing spark wire must be removed to seat the wire directly onto the control's spike connector to maintain a high-voltage path. This OEM Reznor part ensures the system adheres to factory-specified pre-purge and trial-for-ignition timings, maintaining the integrity of the combustion cycle in both natural gas and propane applications.

• Interlock Safety: Features a high-integrity 100% lockout mode, essential for propane configurations and systems with automated vent dampers.
• Technical Compatibility: Engineered as the standard replacement ignition controller for Reznor Model F and B series unit heaters with pilot codes 62, 63, 65, 66, and 84.
• Diagnostics: Compatible with standard LED flash code protocols for rapid troubleshooting of pressure switch, limit, or flame sensor faults.
• Robust Signal Board: Highly sensitive flame-sensing circuitry capable of operating with a minimal 0.2 microamp signal.

Can I use the 257010 on a unit without a vent damper?
Yes, provided the controller has never been previously connected to a vent damper. Once the board "sees" a damper, it locks into that mode and cannot be reset for non-damper units.

How do I clear the 'L' lockout code after a failed ignition?
The lockout code can be cleared by cycling the call for heat at the thermostat, which resets the internal 60-minute timer for an immediate retry.

Is the wiring polarity sensitive?
Yes, the 257010 is polarity sensitive. Ensure the hot and neutral line voltage connections are properly phased to avoid an internal control fault or failure to sense flame.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.