1999 Ford Windstar, No rear heat front heat works

[jacobbones]

I looked at my sisters 1999 windstar because she was having trouble with the heat. It was low on anti-freeze so I filled it, and started it and let it warm-up.

The front heat works fine, hot air will blow from floor,window etc..

When I turn the rear heater on it just blows cold air.

I tried turning just rear heat on but that did nothing.
I am not sure if the rear heater has its own heating element that generates the hot air, or if it is piped from the engine. So I checked all the fuses and they were fine.

Does anyone know what could be causing the rear heater to blow cold air?

[mark_gober]

The rear heater uses engine coolant, just like the front. You may have a clogged heater core in the rear. If my memory serves mr correctly, you can access the fittings from under the vehicle just in front of the rear bumper on the passenger side.

As far as it not blowing when you select it, the front blower has to be on for the rear one to work.

One final thing, in order for the rear to get heat, the front setting needs to be either in floor mode or defrost. (stupid design in my opinion).

Good luck

Mark