Payne PG95ESA Error Code 32: LPS Pressure Switch Did Not Close or Reopened

What Does Code 32 Mean?

Status code 32 (three short flashes followed by two long flashes) means the collector box low pressure switch — the LPS — did not close when expected, or closed and then reopened. On the PG95ESA's condensing design, the collector box gathers combustion products and condensate after the secondary heat exchanger, and this switch confirms proper pressure there. If the LPS stays open for 15 minutes, the furnace locks out.

Payne directs you to code 31 for troubleshooting because the two switches share the same failure modes: a blocked or restricted vent pipe, restricted condensate drainage or a plugged collector box, a defective inducer motor not creating enough draft, and cracked or disconnected pressure switch tubing. The distinction is which switch is reporting the problem — the LPS on the collector box for code 32, versus the inducer housing switch (HPS) for code 31.

Because the LPS watches the collector box specifically, a condensate restriction that lets water back up in the collector box is a classic cause of code 32 on this furnace. Like code 31, this is a "did not close" draft-proving fault (the opposite of code 23, a switch that did not open), and diagnosing the venting, condensate, and inducer is professional work.

What You'll Notice

• The amber LED flashes three short flashes followed by two long flashes (code 32)
• The inducer runs but the burners never light, since collector box pressure isn't proven
• If the switch stays open the furnace locks out after about 15 minutes and stops trying
• You may see standing water, a slow or clogged condensate drain, or a blocked vent near the furnace
• The fault can appear alongside or alternate with code 31 when a shared venting or drainage problem exists

Common Causes

How This Is Diagnosed

A technician follows the same path as code 31 but focused on the collector box circuit. They check the vent and intake for blockages and the condensate drain and collector box for restriction, since water backing up in the collector box is a frequent reason the LPS won't close. The pressure switch tubing to the collector box is inspected for cracks, kinks, or disconnection.

If venting and drainage are clear, they confirm the inducer is producing adequate draft and that the LPS responds correctly to that pressure. These checks involve the vent system, condensate drainage, inducer, and the low pressure switch, so the diagnosis is done by a qualified technician. A homeowner should go no further than clearing an obviously blocked outdoor vent terminal, and only if it is safely reachable.

When to Call a Professional

This code involves components that are not homeowner-serviceable, so have a licensed HVAC technician diagnose and repair it. Keep in mind:

• The inducer runs but the furnace won't light and shows code 32
• The furnace locks out after about 15 minutes of the LPS staying open
• There are signs of a restricted condensate drain, a full collector box, or a blocked vent
• Diagnosis would require measuring draft or testing the inducer motor and the low pressure switch

✓ Verified against manufacturer service manual — March 2026