Girard GSWH-2 error code E3
ECO (Emergency Cut Off / high-limit) thermostat opened — outlet water temperature exceeded 140°F (60°C) either before ignition or during normal operation. ECO will self-reset after cooling.
What to check, and in what order, is in the app. The flow Girard GSWH-2: unit shuts off while running (E3 mid-cycle) walks this code step by step with the pass/fail measurements, wiring schematics and procedures that go with it, and it works offline in the bay.
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- Girard_GSWH-2_Service_Manual.txt
Related codes
- E0Water outlet temperature probe (thermistor) failure — open or short…
- E1Ignition failure or flame-out during ignition trial — board made 2…
- E2Flame sensing interrupted during normal operation (buzzer sounds).…
- E4Water inlet temperature probe (thermistor) failure — open or short…
- E5Blower motor failure — no motor signal detected by the control board…
- E6Over-temperature — outlet thermistor measured water temperature above…
- E7Linear (modulating) gas valve failure — controller detects open…
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