OEM Carrier Low Pressure Switch 312926-258 for Model CH16NA03000GBAAA

This OEM low pressure switch (part number 312926-258) is the factory-specified replacement for the Carrier CH16NA03000GBAAA air handler/furnace system. The pressure switch is a critical safety component that monitors negative pressure created by the inducer draft motor to confirm proper venting before allowing ignition to proceed. When this switch fails or sticks open, the control board cannot verify safe draft conditions and the system will lock out — resulting in no heat and often a blinking fault code indicating a pressure switch fault.

• Specs: Low pressure switch | OEM part number 312926-258 | Factory-calibrated W.C. (water column) rating | Normally open (NO) single-port design | Direct drop-in replacement with OEM wiring harness connector
• OEM vs Generic: This is a genuine OEM Carrier part, manufactured to exact factory W.C. pressure thresholds. Aftermarket pressure switches frequently carry wider tolerances that can cause nuisance lockouts or — more dangerously — fail to detect real venting problems, creating a safety hazard.
• Install difficulty: 3/5 — Requires disconnecting the wiring harness, removing the hose port connection, and mounting screws. Tools needed: flat-head and Phillips screwdrivers, needle-nose pliers, manometer (recommended to verify port pressure post-install). Always shut off power and gas before servicing.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Designed specifically for the Carrier CH16NA03000GBAAA. Always verify the OEM part number 312926-258 printed on your existing switch before ordering, as multiple pressure switch ratings may be used across similar model series. If you are unsure of fitment, our HVAC parts specialists are available to confirm compatibility before you order — no guesswork required.