The Hired Hand 3591-1851 Hot Surface Ignition (HSI) Control Module is the primary control board used across the full line of Hired Hand Super Saver XL box heaters. This module manages the complete ignition sequence, from powering the hot surface igniter to regulating flame safety and automatic shutoff functions.
Designed with a built-in diagnostic light, it helps simplify troubleshooting by indicating ignition or safety faults, making maintenance much easier in the field.
This replacement control module fits all major Super Saver XL heater models, including:
SS-40-XL
SS-75-XL
SS-120-XL
SS-175-XL
SS-200-XL
SS-225-XL
If your heater won’t ignite, shuts down mid-cycle, or shows fault indicators, replacing the control board is often the fix. The 3591-1851 module restores proper ignition and safety control, keeping your heater running reliably in tough agricultural environments.
