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Johnson Controls P20DA-31 Air Conditioning Pressure Control
using this OEM Carrier motor ensures the correct RPM and amperage draw
meaning it will re-close the circuit once the water temperature drops below the fixed or adjustable differential
Always cross-reference your compressor's model and serial number against the HVAC part specifications to ensure a match
Carrier HH18HA420 Limit Switch 320735-701 Johnson Controls P20DA-31 Air ConditioningThe Carrier HH18HA420 Auto Limit Switch is a critical HVAC safety device designed to monitor internal furnace temperatures and protect the heat exchanger from thermal stress. This OEM Carrier replacement part operates with a fixed 90 120F temperature range, ensuring the burner cycles off if the unit exceeds safe operating parameters. As a precision calibrated 90 120 degree limit switch, it features an automatic reset function that restores continuity