Practical AtlasIndependent referenceElectric bill jumped unexpectedly
Observe: billing period · weather · new loads
18 PATTERNSObservable problems
Start with what
you can see.
Symptoms narrow the useful path without pretending to replace inspection, product instructions, or qualified service.
AC runs but the room stays warm
Observe: airflow · thermostat · outdoor unit
A room feels damp or windows condense
Observe: relative humidity · surface temperature
Wi-Fi is slow only in one room
Observe: distance · obstacles · band
Only one device has slow Wi-Fi
Observe: device test · network visibility
Storage keeps filling up
Observe: largest category · growth rate
Monitor says no signal
Observe: input · cable path · known-good source
Phone loses charge overnight
Observe: overnight percentage drop · battery usage graph
Phone gets hot during normal use
Observe: activity when heating · charging state · case and surface
Laptop runs hot and the fan never stops
Observe: what was running · surface under the laptop · process list
Laptop is plugged in but not charging
Observe: adapter wattage · port debris · battery setting
Printer shows offline although it is powered on
Observe: printer network report · IP address match · queue state
Clothes are still damp after a full dryer cycle
Observe: exhaust airflow outside · lint screen · load size
Water stands in the bottom of the dishwasher
Observe: filter · air gap · drain hose loop
Mold returns to the same bathroom surface after cleaning
Observe: drying time after a shower · fan airflow · coldest surface
Hot water runs out partway through a shower
Observe: minutes of hot water · other draws · tank label rating
Water bill jumped with no change in use
Observe: meter movement with taps off · toilet dye test
Prints come out streaked, faded, or the wrong color
Observe: nozzle check pattern · paper type setting · repeat spacing