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Test oven temperature with a thermometer, use calibration offset, and check the sensor or door seal when food cooks wrong.

Fix a portable air conditioner that blows but does not cool by checking the hose, window seal, filter, drainage, sizing, and refrigerant warning signs.

Fix a weak or dead over-range microwave vent fan by cleaning filters, checking exterior venting, charcoal filters, and switch clues.

Troubleshoot a totally dead oven by checking control lock, display power, outlet, breaker, plug, and when wiring needs service.

Fix an oven self-clean cycle that will not start, lock, or finish by checking racks, locks, delay start, errors, and breaker trips.

Handle a gas smell near an oven safely, including when to leave immediately and which faint-odor checks are reasonable.

Troubleshoot an oven that turns on but does not heat by checking settings, breakers, electric elements, and gas igniter symptoms.

Safely handle an oven door stuck locked after self-clean by waiting for cool-down, resetting controls, and knowing when the latch needs service.

Stop microwave sparking by removing metal, cleaning burned food, checking the waveguide cover, and knowing when to replace or call service.

Diagnose a microwave that runs but does not heat by checking cook settings, power level, door latch, and safe service limits.