The answer to 'dehumidifier not turning on' is that there are several common causes, including a tripped circuit breaker, a faulty power cord, a clogged air filter, or an issue with the internal components of the dehumidifier. The most likely culprit is a tripped circuit breaker or a problem with the power supply.
If the dehumidifier is not receiving power, first check the circuit breaker to see if it has been tripped. Reset the breaker and try powering on the dehumidifier again. If that doesn't work, inspect the power cord for any damage or loose connections. You can also try plugging the dehumidifier into a different outlet to rule out an issue with the electrical supply.