I have a local made room cooler which has a exhaust type fan with 24 inch diameter. After isolating the wire going to the fan i installed a ordinary ceiling fan dimmer to it. But it is not working as it should the fan is varying in speed. The dimmer was working with the ceiling fan properly.
Can anyone please tell if it is because the dimmer is not suited for the room cooler fan motor? and what dimmer can i add to the room cooler fan?