What E3 Means
E3 flags a third thermistor gone open-circuit on models equipped with one.
Common Causes of E3
- Thermistor 3 probe failed open
- Wiring or connector problem on that circuit
🔧 One Safe Check You Can Try
A resistance test on the specific sensor E3 maps to for your model.
⚠ Why You Shouldn't Go Further Than That
- As with the other multi-sensor codes, confirming the correct physical thermistor before opening anything up avoids unnecessary work.
Opening a panel to inspect or repair something yourself doesn't automatically cancel your manufacturer's warranty — but it can risk accidental damage, and some manufacturers do have specific service conditions. Check your product's warranty terms, or ask us, before deciding.