What this usually means
A microwave has fewer failure modes than any other appliance in the kitchen, and an unusually sharp line between what an owner can check and what nobody should open. A value-tier machine where the mechanism is conventional and the electronics are minimal. Ranked for a machine in settled service, noise dominates: a value-tier build puts the cheap wearing parts — filters, hoses, seals, screens — in the path of everything the machine does, so they are where the fault usually is.
What it looks like from the front
- Grinding at the turntable or a new buzz while cooking — Timing identifies it: fan and plate start immediately, the high-voltage side only while cooking. See “Abnormal Noise or Vibration”. — Slug: criterion-microwave-abnormal-noise
- Nothing happens, or the display works and start does not — Supply first, then the door interlocks, then a lock state. See “Will Not Start or No Power”. — Slug: criterion-microwave-wont-start
- Flashes inside, a burning smell or a tripping breaker — Unplug and stop; there is no owner diagnosis past this point. See “Electrical, Fire or Gas Hazard”. — Slug: criterion-microwave-electrical-safety
- A door that will not close flush or has to be slammed — Grease in the latch recess is the usual cause; damage is a stop sign. See “Door, Latch or Seal Fault”. — Slug: criterion-microwave-door-seal
- The oven runs and the food stays cold — Confirm with a cup of water at full power before anything else. See “Not Heating”. — Slug: criterion-microwave-heating-failure
- Buttons that do nothing, or a clock that keeps resetting — Lock states and supply interruptions account for most of it. See “Controls, Display or Error Code”. — Slug: criterion-microwave-control-fault
Likely causes in order
- Noise — Ranked first on this brand: a value-tier build puts the cheap wearing parts — filters, hoses, seals, screens — in the path of everything the machine does, so they are where the fault usually is. The turntable ring and coupler collect debris and wear, which accounts for most new noises. There is no counted denominator behind this order — it ranks by how the platform is built and used, not by a measured share.
- Will not start — Ranked second: Several interlock switches must all be made, so any door problem presents as an oven that will not run.
- Trips, arcing and burning smells — Ranked third: A soiled waveguide cover and metal in the cavity cause arcing, and the high-voltage side fails in ways that trip breakers.
- Door, latch and containment faults — Ranked fourth: The door works the interlocks and contains the energy, so it is both a mechanism and a safety component.
Where the faults land — No counted denominator exists for Criterion microwaves in this program's fact bundle, so this table carries no share and no sample size: the order is ordinal and editorial, not a measured proportion of any corpus.
General guidance| Problem class | How often it turns up | The tell-tale |
|---|---|---|
| Noise | most often | The noise stops when the plate and ring are removed |
| Will not start | often | It starts only when the door is pressed firmly |
| Trips, arcing and burning smells | sometimes | The trip happens the moment cooking starts |
| Door, latch and containment faults | sometimes | A tapered gap along the top of the door |
| Runs but does not heat | least often | A cup of water stays cold after two minutes at full power |
When to stop and call
Cleaning the cavity, the waveguide cover, the turntable and the latch recess, checking the supply and clearing a lock state are the owner’s side of this appliance. Everything else is a service call or a replacement, and any arcing, burning smell, repeated trip or damaged door means unplugging it first and deciding afterwards. Unplug the appliance or switch off its breaker before removing any panel. A capacitor can hold a charge after the power is off.
Other faults on this machine
What this page does not cover
This is the family-agnostic page for Criterion microwaves. Nothing more specific exists to send you to at the moment; a model-level page, once written, is linked here and is the better answer. Deliberately not here: the step-by-step diagnosis for any one fault — each class above has its own page.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
