A Rheem PD425143 Pressure Switch Kit detects air pressure and opens or closes the circuit as needed, which is key to proper safety control in the heating and cooling assembly.
The pressure switch kit senses pressure conditions inside the furnace and confirms that the draft and venting system are operating within the required range before allowing the heating cycle to continue. Its calibrated -0.40" WC setting and purpose-built construction are important because they provide accurate safety verification and dependable response in a heating and cooling system.
The pressure switch kit might need replacement if the furnace can fail to start, shut down unexpectedly or show intermittent pressure-related safety lockouts during operation. Physical signs can include cracked housing, worn terminals or damaged tubing connections and environmental signs may include moisture exposure, dirt buildup or corrosion that could affect reliable performance.
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