I have no control over flow of heater/AC air distribution. I understand this is a common problem in the old rangers. Some valuce shaft must be broken. The motor that controls the flapper valve moves. Any ideas.
how do u fix it if it was a vacuum leak? my blows out defrost after a certain rpm or a certain vacum is pulled while accelerating. but once ive stoped it goes back to where ever the control is set to. how do i fix it?
sorry to jack an old thread i was doing a search and found this thread
96 Ranger heater temp issue - when the truck is moving the heat works good ( temp contol on hot ), when i am at a stoplight for longer than a minute the air from the vents starts getting cool until the truck starts moving again when the vent air starts blowing hot again. If idling first thing in the morning ( for at least 10 minutes ) the vent air is cool until i start driving down the road when the vent air gets hot like normal. I already replaced the "heater valve box " inline with the heater core hoses. (the heater temp is of course at the HOT setting always) . Any ideas ?