What Er 13 Means
Er 13 is a system failure: the control has lost control of the unit.
Common Causes of Er 13
- Main control failure
- Severe supply disturbance
🔧 One Safe Check You Can Try
Switch off the breaker, wait five minutes and restore power. If Er 13 returns, leave the breaker off and book service.
⚠ Why You Shouldn't Go Further Than That
- A control that has lost command of the loads is not safe to keep running.
- Diagnosis needs the engineering tests in the service manual.
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.