The short answer for C models
When an Avanti C microwave trips a breaker, smells hot or sparks, the useful response is to take it out of service rather than to narrow the fault down. A standard household branch circuit is fifteen or twenty amps at one hundred and twenty volts, and a microwave is one of the larger loads on it.
Symptoms, and the ones that mean something else
- A loud buzz or crack when the oven runs — Arcing somewhere in the high-voltage section.
- Visible sparking or arcing inside the cavity — Usually metal in the oven or damaged cavity paint, but it should be treated seriously either way.
- A hot or acrid smell during or after use — Overheating insulation or a component, and a reason to stop immediately.
- The breaker trips the moment it is plugged in — A fault present at rest, which is a different and usually simpler failure.
- NEAR MISS — the oven simply will not start — That is a start fault and it has its own page and its own list.
Likely causes on C, ordered
- High-voltage component shorted — Ranked first for a breaker that trips under load, because that is the only section of the oven that draws heavily enough to do it.
- Earth fault in the appliance — A tingle from the cabinet or an RCD tripping, and the oven should be unplugged and left.
- Socket or plug connection failing — Second and often overlooked: a hot plug or a scorched socket is a fault outside the appliance and it is urgent.
- Flex damaged where it leaves the cabinet — Wear at the strain relief is a common and dangerous fault on any appliance that gets moved.
The order that saves the most time
- Start with what the ranking makes most likely — On C models, two of the four causes above are checkable without a panel coming off, and this order puts every one of them before anything that is not.
- Look inside the cavity for foil, metal trim or damaged paint — Arcing inside the cavity usually has a visible cause that an owner can identify.
- Note whether the breaker trips at plug-in or at start — Those two are different faults, and it is the single most useful thing you can tell a technician.
- Ask what else is on the same circuit — A standard household branch circuit is fifteen or twenty amps at one hundred and twenty volts, and several appliances can exceed that.
- Look at the flex where it enters the cabinet — Wear at the strain relief is common on any appliance that gets moved and it is dangerous.
Why the case stays on
Safety
Switch the oven off at the socket and unplug it. On a microwave the high-voltage section holds a charge in its capacitor after the power is off, and that charge is lethal. There is no owner-serviceable part inside the case and no safe way to establish that the capacitor has discharged without the right tool.
Models in the C family
Reference| Model number | Family key |
|---|---|
| C42PXP05 | avanti:microwave:c |
When to call a technician
Call for anything that is not cleaning. The high-voltage capacitor inside can hold a lethal charge after the oven is unplugged, so there is no owner repair on this appliance beyond the cavity, the turntable and the door seal face.
Other C problems we cover
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