Reznor 195573 Control Borad

Ensure your terminal-to-terminal communication remains flawless with this genuine Reznor 195573 Direct Spark Ignition (DSI) board. Engineered specifically as a central HVAC control board for gas-fired unit heaters and air handlers, this component acts as the primary microprocessor "brain," managing critical ignition sequencing and safety lockdowns. This specific iteration includes an integrated cooling relay, providing specialized logic for units equipped with air conditioning or specialized ventilation cycles. The board is designed for high-demand industrial environments, managing the ignition timing, flame rectification, and power distribution to the inducer and blower motors. For technicians troubleshooting erratic unit behavior, this OEM board serves as a drop-in Reznor replacement part to resolve issues stemming from relay failure, diagnostic error codes, or inconsistent spark. Its rugged construction supports the intense thermal cycling typical of commercial Rooftop Units (RTUs) and indirect-fired models, ensuring that high-limit safety thermostats and gas valves receive precise voltage signals every cycle.

• Precise Ignition Sequencing: On-board DSI logic eliminates standing pilots, managing the 3nd-stage spark and flame sensing for reliable start-ups.
• Integrated Cooling Control: Built-in cooling relay board logic streamlines the wiring for dual-stage heating and cooling configurations.
• Safety Logic: Constantly monitors high limit sensors and rollout switches, initiating safe lockout protocols if airflow or combustion parameters are exceeded.
• OEM Compatibility: Designed for seamless integration with existing Reznor wiring harnesses, including models SC, RPV, and various indirect-fired air handlers.

What does the 3-flash LED code indicate on this board?
Typically, a three-flash sequence on a Reznor DSI board indicates that the high-limit or rollout switch is open, often due to restricted airflow or an overheated heat exchanger.

Can the 195573 replace older ignition controllers?
Yes, this board replaces several legacy part numbers and is often found in kits designed to upgrade obsolete mechanical modulation or older ignition modules.

Why is my unit clicking but not sparking?
If the board relays click but no spark occurs at the electrode, verify the 24 VAC supply and check the ignition cable for ground faults before assuming the circuit board is defective.

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.