02/06/2026
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New Leads Electrical
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Dyce, Aberdeen
2 June 2026
Commercial Oven Fault-Finding & Diagnostics — Premier Corex, Dyce (Aberdeen)
Full electrical fault-finding investigation on a commercial oven at Premier Corex in Dyce, Aberdeen. Identified a sticking control relay, a damaged live cable shorting to the metal frame, and a sticking contactor — parts now being quoted for repair.
Commercial Oven Fault-Finding & Diagnostics — Premier Corex, Dyce (Aberdeen)
Premier Corex in Dyce, Aberdeen called us in to investigate intermittent and unsafe operation of one of their commercial ovens. The oven was tripping, behaving erratically, and showing signs of heat damage inside the control enclosure — a classic mix of symptoms that needs a methodical fault-finding approach rather than guesswork.
What we did
• Safely isolated the oven and locked off at source before opening the control panel.
• Carried out a full visual inspection of the heating elements, terminations, contactors, control relays and internal wiring.
• Resistance, continuity and insulation resistance testing on suspect circuits to confirm where the faults actually were.
• Mechanically and electrically tested the control relays and the main contactor to check for sticking contacts.
Faults found
1) Faulty / sticking control relay — an Aromat JH2a-W-AC120V (AR55271098) relay was not dropping out cleanly. A sticking relay on an oven control circuit means heating stages can stay energised when they should be off, which is both an efficiency and a safety issue.
2) Damaged live conductor shorting to the metal frame — one of the red live cables inside the enclosure had insulation damage and was making intermittent contact with the metal chassis. This is exactly the kind of fault that causes nuisance tripping, scorched terminations and, in the worst case, a live casing. The damaged section needs cutting back and re-terminating with new crimps and sleeving.
3) Sticking main contactor — the Telemecanique LC1 D12004 4-pole contactor was not releasing reliably. A sticking contactor on a multi-element oven will keep elements energised after the controller has called for off, leading to overheating, premature element failure and a real fire risk.
4) General condition — heating element area showed heavy deposits and the control enclosure had clear signs of heat stress around the affected terminals. Photographed and logged so the customer has a full record.
Next steps
All faults have been documented and we are now sourcing and pricing the replacement parts:
• New Aromat JH2a (or direct equivalent) control relay
• New Telemecanique / Schneider LC1 D12 series 4-pole contactor
• Replacement live conductor section, crimps and heat-resistant sleeving
• A deep clean and re-termination of the affected control area before re-commissioning
Once parts are approved we will return, fit the new components, re-terminate the damaged wiring, insulation-resistance test the circuits and function-test the oven through a full heat cycle before signing it back into service.
Why this matters for a commercial kitchen / production environment
In a commercial setting, a "the oven keeps tripping" call almost always has more than one root cause behind it. Resetting a breaker and walking away is not fault-finding — it is hiding the problem until something more expensive (or more dangerous) happens. Our approach at Premier Corex was to find every fault, prove it with testing, photograph the evidence and quote the customer for a proper repair so the oven goes back into service safe, reliable and compliant.
New Leads Electrical covers Dyce, Aberdeen and the wider North East for commercial electrical fault-finding, planned maintenance and repairs to ovens, production equipment, distribution boards and control panels. NICEIC approved, fully insured, and used to working around live production environments.
