A surprising number of first-week faults are installation faults. Transit bolts left in a washer will make it hammer hard enough to walk across the floor. A dishwasher built in behind a heavy custom panel, without the door spring tension being reset to that weight, will either drop open or refuse to stay shut – and the machine gets blamed for it. A built-in oven pushed into a cabinet without the specified ventilation gaps will slowly cook its own electronics. A hood connected to an undersized or over-long duct run moves far less air than its rating suggests. None of those are appliance faults, and all of them are reported as appliance faults.
We install the machine, level it properly, make the water, drain, power or gas connections correctly, remove the transit hardware, adjust the door to the panel where the unit is integrated, and run it before leaving so you can see it working. Where the existing services are not suitable – a duct run that is too long or too restricted, a shut-off valve that will not close, a supply that was extended rather than replaced – you hear it before the appliance goes into the opening rather than after. A drying cabinet gets the same treatment: clearances checked, a level and solid footing, and a confirmation that it is genuinely moving warm air before we call the job done.