Troubleshooting My Philips air purifier will not switch on If your Philips Air Purifier will not switch on, find out in the following lines what you can do to solve the issue. The Air Purifier is not switched on Please, make sure your Air Purifier is on. There is a connection problem Please, check if the plug of your Air Purifier is inserted in the wall socket properly. The filters are not placed correctly When the filters are not correctly placed, your Air Purifier might not switch on. Please, make sure they are placed correctly. All of the above is checked but it still won’t switch on In this case, we recommend you to contact Philips Consumer Care for a solution.