Payne PG96VTA Error Code 23: Pressure Switch Did Not Open
What Does Code 23 Mean?
Status code 23 on the Payne PG96VTA indicates the pressure switch did not open as expected during the furnace operating sequence. The pressure switch monitors the negative pressure generated by the inducer motor and should open (break contact) at a specific point in the heating cycle to confirm the inducer is operating within safe parameters.
The service documentation identifies two causes: obstructed pressure switch tubing and a pressure switch stuck in the closed position. Obstructed tubing prevents the pressure change from reaching the switch diaphragm — the switch remains closed even though operating pressure has changed, because it cannot sense the change. A stuck-closed switch has a mechanical failure where the diaphragm or contact mechanism does not release even when pressure conditions allow it to.
Diagnosis involves visually inspecting the rubber tubing connecting the pressure switch to the inducer housing for kinks, clogs, or disconnection, and then testing the pressure switch with a manometer or by substitution. The PG96VTA is a two-stage furnace, so there are separate high-heat and low-heat pressure switches — a technician will need to determine which switch is affected.
Common Causes
| Cause | Likelihood | DIY? |
|---|---|---|
| Obstructed pressure tubing | Most common | ✗ Call a pro → |
| Pressure switch stuck in the closed position | Common | ✗ Call a pro → |
When to Call a Professional
Contact a licensed HVAC technician if:
- Contact a technician to inspect the pressure switch and tubing — the furnace will not complete a heating cycle with this fault active
- If the pressure switch is found faulty, it must be replaced with the correct OEM-specified component for the PG96VTA
✓ Verified against manufacturer service manual — March 2026