I already have the 'tube sock' installed but on my 2nd runs it seems to get too hot and build up pressure. Can I periodically plug in only the fan part to the wall and not the burner? The Fem/Male ends looklike they were intended to do so? Is the fan unit 110V or is there a transformer somewhere in line I am not aware of? what is the highest % I should be running in the unit? should I dilute it more? HELP!!!!!!!!