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

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

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.

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

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

Fix a microwave tray that will not spin by cleaning and reseating the glass tray, roller ring, coupler, and checking the drive motor.

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

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

Reduce microwave hot and cold spots by changing food placement, stirring, covering, power level, and checking the waveguide cover.