Whirlpool water heaters have several reset paths depending on type.
Electric — ECO reset
- Turn off breaker
- Remove upper access panel
- Locate red ECO button on upper thermostat
- Press firmly until click
- Replace panel, restore breaker
If ECO trips again immediately, underlying issue is active.
Gas — gas valve cycle
- Turn gas control knob to "Off"
- Wait 5 minutes
- Turn to "Pilot" (standing pilot) or "On" (electronic ignition)
- For standing pilot: depress pilot button per unit instructions
- Monitor LED flash code
Power Vent — combined reset
- Unplug 120V power to fan
- Cycle gas valve (off → pilot → on)
- Plug power back in
- Fan should start with heating call
Hybrid Heat Pump — multiple paths
- Mode reset: press mode button on display panel
- ECO reset: red button on resistance backup thermostat
- Compressor lockout: breaker off 30 minutes, restore
- Factory reset: hold mode + temperature for 10 seconds
Bottom line
Electric: ECO red button. Gas: valve cycle. Power Vent: power + gas cycle. Hybrid: mode → ECO → breaker → factory.