Fault codes / Girard GSWH-2 / Fd
Girard GSWH-2 code Fd
What it means: Freeze protection is active.
What to check
The freeze thermostat turns on near 38 F and off near 58 F. Normal in cold weather. Drain the heater for storage.
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 E8 Air pressure switch fault
- Girard GSWH-2 code E9 Flame sensed before ignition or a short
- 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.