Fault codes / Girard GSWH-2 / E6
Girard GSWH-2 code E6
What it means: Outlet water over 140 F for 3 seconds.
What to check
Hot water is entering the heater (bypass valve passing, recirculation), or the outlet thermistor reads wrong, or the flow is very low.
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 E7 Linear gas valve open circuit
- Girard GSWH-2 code E8 Air pressure switch fault
- 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.