Heater problems

We use the diagrams in. You can purchase these on the link below. At the bottom of my reply box.

Find a car repair manual for your Ford Ranger Repair Question.

You have a vacuum leak. The vents actuators are run by engine vacuum. When you accelerate, the engine vacuum drops so that is when you will notice the change. As you release the throttle, the vacuum builds so the vent has a better chance of working.

Check under the dash for leaks and under the hood. With the engine running, you may get lucky and hear a hissing sound where the noise is coming from.

Let me know if this helps or if you have other questions.

Joe

Hello -

To better assist you is your model the Ranger or Ranger Splash and what is the engine size in liter?

Did this just happen or have you been slowly loosing heat

How is the engine temp gauge look..... Normal operating range?

Once the engine is at operating temperature please feel the heater hoses going into and out of the firewall. Do they both feel the same..... Both hot or is one colder than the other?

Hello -

Thanks for the info.......

So is this the same with the fan speed in any setting?

How does the AC feel....... Does it feel the same temperature..... What I am looking for here is to see if there is a temperature difference... You select full cold yet the same warm air..... You select hot... The same warm air.......

You said the temperature control door was moving as it should..... So you select hot and the door moves all the way..... Cold... It moves the opposite way all the way

Hello -

Thanks for the update.

On the control panel assembly is the temperature control knob. The temperature knob mechanically operates a cable through a cam mechanism to adjust the temperature blend door. Temperature blend door is in the plenum assembly. When temperature knob is in cool position (turned fully counterclockwise), temperature blend door stops airflow to heater core. When knob is in the warm position (turned fully clockwise), air is directed through the heater core. When knob is in intermediate positions, heated air is blended with cooler incoming air to achieve desired temperature.

Since this appears to be a mechanic, look at where the cable connects to the blend door. Then move the cable. If you can see the cable moving at the blend door connection then most likely the blend door is broken from the connector.

If you are turning the knob and the cable is not moving then it may be broken at the control panel assembly knob. I would check there.

If it is not broken there and still not moving then the cable may be broken. Check that