Rheem-Ruud 47-100436-02 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 ...

Regularly inspect the control board for dust, corrosion, or loose connections and clean it using dry compressed air. Ensure all wiring is secure and free from damage. Proper maintenance prevents electrical faults and ensures accurate system operation. Always disconnect power before handling to avoid electrical hazards.

• Failure to initiate system startup or shutdown cycles.
• Intermittent or no response from connected components.
• Burnt or damaged circuit traces causing malfunction.