Bryant Furnace Code 32.1
WarningShown as: 3 short flashes, 2 long flashes
Open main pressure switch (LPS) - the main low-heat pressure switch is open when it should be closed.
Manual wording: “32 1 Open Main pressure switch (LPS)”
Documented for: 912SE
Likely causes, most common first
- Restricted vent or blocked intake/exhaust termination
- Plugged condensate drain
- Disconnected or obstructed pressure tubing
- Defective inducer motor
- Defective pressure switch
- Excessive wind
What you can safely check yourself
- Check outdoor intake and exhaust pipes for snow, ice, leaves, or a nest
- Check the condensate drain line and trap for a clog
- Replace a dirty filter
When to call a technician
If venting and drain are clear, the inducer or pressure switch needs testing by a technician.
A Bryant furnace throwing this code repeatedly has a reason — clearing the code without fixing the cause just hides it.
Source
- Installation, Start-up, Operating and Service and Maintenance Instructions - 912SE (Bryant Heating & Cooling Systems, 912SE Legacy Line 92% single-stage condensing gas furnace) · checked 2026-08-25