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These OEM pressure switches — 312926-252 (High Pressure Switch) and 312926-258 (Low Pressure Switch) — are the factory-specified replacements for the Carrier CH14NA06000GBAAA air handler and comfort system. Pressure switches prove that the inducer motor is generating adequate draft before allowing ignition to proceed. When either switch fails or sticks open, the control board cannot confirm safe venting conditions and the system locks out before the burners ever fire — leaving you with no heat and often a blinking fault code indicating a pressure switch fault.
Compatibility: Designed specifically for the Carrier CH14NA06000GBAAA system. Always verify your existing switch's W.C. rating and hose port configuration against the data label on your unit before ordering. Both the high and low pressure switch variants are available — select the correct part number (312926-252 or 312926-258) matching your failed component. Not sure which one you need? Our HVAC parts specialists can confirm fitment before you order — contact us today and get your system back online fast.