Westinghouse tankless and heat pump products use numeric fault codes displayed on the control panel. Storage tanks (WER electric, WGR gas) don\'t have digital displays — diagnostics are by symptom and multimeter.
Gas Tankless (WGRGH) codes
| Code | Meaning | Action |
|---|---|---|
| E01 | Ignition failure | Gas supply, igniter, flame sensor, gas pressure |
| E02 | Flame failure during operation | Vent obstruction, gas pressure drop, flame sensor |
| E05 | Outlet temperature sensor | NTC sensor test; replace |
| E10 | Vent / intake fault | Inspect vent termination; clear obstructions |
| E14 | Overheat / scale | Descale heat exchanger; check flow |
| E16 | High temperature limit | Cool-down; descale; verify sensors |
| E29 | Condensate drain blocked | Clear condensate trap and drain line |
| E79 | Combustion fan | Blower motor, capacitor, hall sensor |
Electric Tankless (WET) codes
| Code | Meaning | Action |
|---|---|---|
| E1 | No flow detected | Inlet filter clean; flow rate verify |
| E2 | Element / heating fault | Element resistance test; breaker check |
| E3 | Outlet sensor fault | NTC sensor test |
| E4 | Inlet sensor fault | NTC sensor test |
| E6 | High temperature lockout | Cool-down; verify flow; element test |
Heat Pump (WH HP) codes
| Code | Meaning | Action |
|---|---|---|
| HP-1 | Compressor fault | Verify ambient 45-95°F; tech support if persists |
| SE-1 | Tank sensor fault | NTC sensor test; replace |
| CO-1 | Condensate blocked | Clear drain trap |
| AM-1 | Ambient out of range | Verify 45-95°F; ducting kit if needed |
Storage tank diagnostics (no codes)
WER electric and WGR gas storage tanks don\'t have digital displays. Diagnose by symptom:
- No hot water (electric): breaker → ECO reset → thermostat → element
- No hot water (gas atmospheric): pilot → thermocouple → gas valve
- No hot water (Power Vent gas): 120V outlet → blower → vent → gas valve
How to read codes
- Display shows the active code when fault is current
- Press Menu or Info button to see fault history (last 10 events)
- Some codes auto-clear when condition resolves; others require manual reset
How to reset
- Tankless: press reset button on the control display, OR power-cycle the unit at the breaker
- Heat pump: press reset on the control panel; some faults require breaker cycle
- Don\'t repeatedly reset without diagnosing — recurring fault indicates persistent issue
Bottom line
Tankless and heat pump codes are diagnostic. Most resolve with simple actions (clean filter, descale, sensor replacement). Storage tanks use traditional symptom-based diagnostics. Westinghouse tech support (1-800-388-0006) is helpful for code interpretation.