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Escort Cabriolet Club

Luke Warm Heater


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I can't seem to get any heat out of my mk4 cab heater, it is warm if you put your hand close to air vents but not enough to warm up the cabin.

 

Water pipes into and out of the heater matrix are hot but the rather wimpy flow of air coming out of the vents is only just warm.

 

Anyone got any idea how to improve things?

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  • 4 weeks later...
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Update time.

 

After checking water pipes in and out of the matrix were hot... Ouch! Yes they were both hot lol.

 

I then started poking around inside the car to try an figure out how the heater distribution box works

 

For those who don't know (I didn't know until today) the box behind the stereo which distributes the heat to the various outlets in the cabin is controlled by two cables, these cables are attached to the dials above the stereo.

 

The right hand dial is connected to the lever on the passenger side of the heater box, this lever controls the flaps in the box that distribute the air to the top middle or bottom air outlets. On my car the outer part of the control cable was not connected to the appropriate retaining clip so the flaps were not operating fully (1 fault found)

 

The second cable connected to the left hand dial loops round to the drivers side of the heater box and connects to a lever on the box (which is hidden behind an air duct, you need to stick your head into the footwell to see this lever) this lever operates a flap inside the box that controls whether the air streaming through the box passes around the matrix (cold air) or goes over the matrix (hot air) on my car the clip that connects the control cable to the lever had come off (fault 2)

Now I have hot air YAY! But.... I cannot turn the hot air back to cold. So I take out the heater controls to find that the outer part of the control cable is sliding back and forth in and out of the heater control panel. The cable outer should be retained by a plastic clip that pinches 2 fingers together to retain the cable outer, I eventually found this clip snapped in half on the floor of the car :sad: so I fasioned a new clip from a piece of aluminium and resolved the 3rd and final fault.

 

Hopefully this will help someone somewhere, but for now I will bask in my lovely warm heated cabby :smile:

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