Reznor 195265 DSI Control Board

Thermostatic expansion valves are an integral part of your refrigeration unit. They are responsible for ensuring the right dosage of refrigerant is entering the cooling coil to ensure maximum efficiency in the air conditioning of the system.    These special expansion valves come with a temperature sensor that is mounted at the end of the evaporator coil. They incorporate signals from this sensor to maintain the required temperature of the HVAC system. The thermostatic expansion valve works like a precision device that can regulate the measurements of the liquid refrigerant that flows into the evaporator of your system. This regulation in the flow of the refrigerant is essential to prevent the reverse flow of the refrigerant into the compressor of your system.    Through this mechanism, the thermostatic expansion valve successfully separates the high and low pressure sides of the refrigeration/air conditioning system. The liquid refrigerant enters the expansion ...

The control board should be kept clean, dry, and free from dust accumulation inside the heater cabinet. Inspect all wiring connections periodically for tightness and signs of overheating or corrosion. Confirm stable grounding and consistent incoming voltage to reduce ignition and control faults.

• Failure to initiate ignition sequence.
• Random lockouts or system resets.
• No spark or weak ignition signal output.
• Burnt relay or damaged board components.
• Loose wiring connections interrupting control signals.
• Fault codes triggered by voltage fluctuations or grounding issues.