Fault codes / Girard GSWH-2 / E8
Girard GSWH-2 code E8
What it means: Air pressure switch fault.
What to check
Check the hose for cracks or water, the small pickup tube for blockage, then suck gently on the hose and listen for the switch click. Blocked vent also trips it.
Learn the system
Practice it on a service call
Guided diagnosis
Other Girard GSWH-2 codes
- Girard GSWH-2 code E0 Outlet water thermistor open or shorted
- Girard GSWH-2 code E1 Ignition failed or flame lost at start
- Girard GSWH-2 code E2 Flame lost while running
- Girard GSWH-2 code E3 Eco (high-limit) switch is open
- Girard GSWH-2 code E4 Inlet water thermistor open or shorted
- Girard GSWH-2 code E5 Blower fault
- Girard GSWH-2 code E6 Outlet water over 140 F for 3 seconds
- Girard GSWH-2 code E7 Linear gas valve open circuit
- Girard GSWH-2 code E9 Flame sensed before ignition or a short
- Girard GSWH-2 code Fd Freeze protection is active
- Girard GSWH-2 code En Run timer ended
Full field guide: Girard GSWH-2 tankless water heater
Codes come from the maker manuals and public service sheets. Your model's own chart always wins, and LP and 120 volt work belongs to a qualified technician.