Codes that name it
Amana
- Amana furnace EE2:
Pressure switch hose blocked, pinched, or connected improperly
Amana and Goodman *CVC96 / *MVC96 two-stage furnace installation instructions (IOG-2015L) (opens in a new tab) ↗ - Amana furnace EE9:
Pressure switch hose blocked, pinched, or needing repair
Amana and Goodman *CVC96 / *MVC96 two-stage furnace installation instructions (IOG-2015L) (opens in a new tab) ↗
American Standard
- American Standard furnace E3.2:
The install steps say pressure-switch tubing must rise so condensed flue gas does not enter the switch
American Standard S9V2 installer's guide (18-CE01D1-1E-EN) (opens in a new tab) ↗ - American Standard furnace E3.4:
Technician: check the 2nd stage pressure switch, tubing and inducer. Tubing must rise so condensate does not enter the switch
American Standard S9V2 installer's guide (18-CE01D1-1E-EN) (opens in a new tab) ↗
Bryant
- Bryant furnace 23:
Obstructed pressure tubing
Bryant 80% variable-speed two-stage furnace troubleshooting guide (Catalog No. TG-GFB80-02) (opens in a new tab) ↗ - Bryant furnace 32:
Disconnected or obstructed pressure tubing
Bryant 80% variable-speed two-stage furnace troubleshooting guide (Catalog No. TG-GFB80-02) (opens in a new tab) ↗ - Bryant furnace 43:
Disconnected or obstructed pressure tubing
Bryant 80% variable-speed two-stage furnace troubleshooting guide (Catalog No. TG-GFB80-02) (opens in a new tab) ↗
Carrier
- Carrier furnace 23:
Obstructed pressure tubing
Carrier 59SC5 installation, start-up and operating instructions (opens in a new tab) ↗ - Carrier furnace 31:
Disconnected or obstructed pressure tubing
Carrier 59SC5 installation, start-up and operating instructions (opens in a new tab) ↗
Goodman
- Goodman furnace EE0:
Technician: check front cover pressure switch operation and drainage (hose, wiring, contacts)
Goodman GR9S96/GD9S96 installation and operating guide (IOG-2037B) (opens in a new tab) ↗ - Goodman furnace EE2:
Pressure switch hose blocked, pinched or connected improperly
Goodman GR9S96/GD9S96 installation and operating guide (IOG-2037B) (opens in a new tab) ↗
Rheem
- Rheem furnace 45:
Disconnected, blocked, split or cut pressure switch hoses
Rheem R96V installation instructions (92-24161-124-03) (opens in a new tab) ↗ - Rheem furnace 46:
Damaged pressure switch hoses
Rheem R96V installation instructions (92-24161-124-03) (opens in a new tab) ↗ - Rheem furnace 57:
Damaged pressure switch hoses
Rheem R96V installation instructions (92-24161-124-03) (opens in a new tab) ↗
Trane
- Trane furnace E3.2:
Obstructed pressure switch hose or flue piping, or incorrect vent size
Trane S9V2 Service Facts (S9V2-SF-2A-EN) (opens in a new tab) ↗ - Trane furnace E3.4:
Obstructed pressure switch hose or flue piping, or incorrect vent size
Trane S9V2 Service Facts (S9V2-SF-2A-EN) (opens in a new tab) ↗
York
- York furnace 3 red flashes:
Broken pressure switch hose
York TG9S installation manual (Johnson Controls 1083287-UIM-C-0715) (opens in a new tab) ↗
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Safety first
Unplug the furnace or switch it off at the breaker, and shut off the gas supply where relevant, before you open any panel. Capacitors can hold a charge after power is off. Gas, electrical-panel, refrigerant and carbon-monoxide work belongs to a licensed professional. Follow the manual for your model (safety terms).