Originally Posted by Jungle
I've got old model that came with the house. Half the time it is cold dry and not hot. I keep fiddling with the knob and it seem to help sometimes. Do think there is cheap fix or would look to buy a new one?
Assuming it's electric:
Loose connection to the switch in back of the knob.
Bad switch in back of the knob. In this case, balance investing the cost of putting an electrically equivalent part in a dryer that may fail at any time against the cost of a new dryer.