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Conair bonnet hair dryer only 3 months old quit working

Suzy Cory, Try another known working outlet. If no go, more then likely has a one year warranty on hair dryer and you may want to consider contacting the manufacturer for repair/replacement/refund. If not you could disassemble the hair dryer and test/check all connections, cord/plug, switch, if fused check, with a DVOM to see if faulty. Below is a guide to disassemble various models that may help. If not wanting to work on the dryer yourself perhaps have a good local small electronics shop have a look, diagnose and estimate repair. Good luck. I hope this helped you out, if so let me know by pressing the helpful button. Hair Dryer Repair

It is covered under warranty. First try returning it to place of purchase. That failing, register it here, then request a warranty repair: https://www.conair.com/co/101e94/product

If it experienced a reduction of airflow, you might have tripped the safety fuse on the heating element.