Start with what you noticed
Find the change.
Keep the context.
Possible causes are not confirmed diagnoses. Choose the appliance before interpreting a symptom.
Washing machine
Water stays in the drumThe wash ends without a spinThe programme will not startLittle or no water entersWater appears around the machineThe machine becomes unusually noisyThe wash seems coldThe wash stops part way through
Washer-dryer
Clothes remain wet after dryingWater remains after a combined cycleThe combined appliance will not startDrying stops before completionWater escapes during useA new noise developsThe wash cannot reach a final spinThe result differs between wash and dry
Tumble dryer
The drum turns without useful heatThe drum does not turnThe dryer stops repeatedlyThe drying result is unevenThe dryer starts making a new soundNothing happens when Start is selectedWater appears under a condenser dryerA warning returns on the display
Dishwasher
Water remains in the bottomDishes are left dirtyThe wash does not receive waterThe dishwasher will not beginWater escapes during washingThe wash finishes coldAn unfamiliar sound startsThe cycle repeatedly stops
Oven
The oven runs without heatFood cooks unevenlyThe oven will not respondThe oven trips the electrical protectionA fan or vibration becomes noisyThe oven door will not close properlyThe temperature result changesThe display shows a warning
Cooker
One cooking cavity will not heatThe cooker controls do not respondCooking performance has changedThe cooker door does not shut correctlyUsing the cooker trips the supplyA new sound comes from the cookerA hob section behaves differentlyA message interrupts cooking
Hob
One cooking zone will not heatThe controls do not respondThe hob switches itself offA code or symbol appearsHeating differs between zonesThe entire hob appears inactiveThe hob makes an unfamiliar soundThe cooking surface is damaged
Extractor hood
Steam is not clearing effectivelyThe extractor fan will not runThe hood lights failThe hood makes a new vibrationThe hood buttons stop respondingThe fan stops during operationMoisture or grease drips from the hoodThe fan runs at only one speed
Standard fridge & freezer
The cabinet is warmer than expectedFresh food begins freezingIce builds up unusuallyWater collects inside the cabinetA new noise is heardThe cabinet door will not sealA temperature warning appearsCooling changes during the day
Macerator
The unit does not startThe macerator keeps runningThe unit hums without clearingA leak appears near the unitThe unit starts without fixture useThe unit sounds unusually harshConnected fixtures clear slowlyOdour develops near the unit
Food-waste disposal
The disposal will not runThe unit hums without turning normallyWater appears below the sinkThe sink drains slowlyA new grinding sound appearsThe switch does not operate the unitThe disposal stops during useAn odour persists around the disposal