Symptoms and warning signs
How why is a motor overload relay tripping typically shows itself, and which signs mean the circuit should stay off until it has been inspected.
Likely electrical causes
- —Faulty or deteriorated protective device
- —Loose, damaged or overheating connection
- —Insulation breakdown or moisture ingress
- —Faulty appliance or equipment on the circuit
- —Overloaded circuit or supply-side problem
Immediate safety precautions
- —If you smell burning, see smoke or arcing — switch off at the main switch only if safe to do so
- —Do not touch anything wet, scorched or exposed
- —Do not repeatedly reset a tripping device
- —Do not open the consumer unit or distribution board
- —In a fire, leave the building and call 999
How our engineer diagnoses it
Safe isolation, visual inspection, then structured testing — insulation resistance, continuity, polarity, earth fault loop impedance and RCD tests as appropriate — to locate the fault rather than guess.
Typical repair options
- —Emergency isolation of the affected circuit
- —Temporary safe restoration of unaffected circuits
- —Permanent remedial repair with test results recorded
When urgent attendance is needed
Call immediately if there is smoke, a burning smell, heat at an accessory, water near electrics, a shock, or a loss of supply affecting vulnerable people or critical equipment.
Related services
Frequently asked questions
Is why is a motor overload relay tripping an emergency?
It is urgent if there is smoke, burning, heat, water near electrics, a shock, or loss of power to vulnerable people or critical equipment. If unsure, call us and we'll advise.
Can I fix it myself?
Resetting a device once is fine. Do not open consumer units or distribution boards, and never carry out live testing unless you are qualified.
Do you cover all of London?
Yes — we attend across Greater London, day and night.