Girard Products GSWH-2 Technical Manual page 19

If an E7 fault code appears then the board is not sensing the linear valve. If this occurs, then you will need to check the
connection of the white and red wires on the 8 wire plug as well as the connections behind the firewall. The resistance of the
coil of the linear valve can be measured at the white and red wires of 8 wire connector when it is unplugged. The resistance
is approximately 85 ohms.
E7: Linear valve failure:
The Controller Module detects an open circuit in the Linear Valve control circuit before ignition or during normal operation indicating a
faulty Valve.
Removal and Replacement of Gas Valve
1. Turn off the power switch or pull the fuse to turn OFF power to the water heater.
2. Remove the power switch by pressing down on the top tab and up on the bottom tab.
3. Pull the switch out and pull the wires through the opening.
4. Then remove the 15 mm nut from the fuse holder.
Do not attempt to
repair gas valves.
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Vent