Problem with heat.

[Battery]

It's getting cold so I tried using my heat today. No matter how high I put it on it sounds like the heat is being blocked somewhere. As I put the fan on higher I hear it but it sounds like it's hitting something before it gets to the vents. Nothing comes out of the vents. If I turn on the AC cold air comes out no problem, but hot air will not come out. Is this a problem with the blend door?

 

[papa bear]

I think it might have some thing to do with the blend door,have you tried messing with the stuff under the dash maybe tapping it or have you fixed it

 

[Battery]

Well I'm really not to sure where to start. I don't have the money to go have it looked at or I would.

 

[whiplash15]

Go to "markviii.org" and on the home page look for "technical information", and then "blend door". It will give you the whole story and an emergency fix.

 

[Battery]

Those are for gen 2. Sorry didn't mention I had a gen 1. And it's not that hot air never comes out of my vents, no air at all comes out. It's only with the heat not the A/C.

 

[Battery]

Anyone know what this could be?

 

[marked8]

I would say the blend door actuator motor, but you should still have air coming out if that were broken, just cold. Gen I's use a motor that is behind the information center behind the dash. They have internal plastic gears which will eventually strip rendering the unit useless.
I would check to see if you have a vacuum problem at the back of the climate control unit. It is very easy to remove. If that does not work I would try swapping out the climate control unit with a junkyard unit as these have been known to fail. It is difficult to diagnose without seeing the car.
Whatever you do, do not take it to a Lincoln dealer or a possible easy fix might cost more than your car is worth.

 

[chicken]

it's not that hot air never comes out of my vents, no air at all comes out. It's only with the heat not the A/C.

I'm wondering if the heater core is plugged and the air cant flow through it

 

[Battery]

I'm wondering if the heater core is plugged and the air cant flow through it

How could I check this? I'm going to try the other suggestions this weekend. Thanks for the replies guys.

 

[chicken]

not sure, you might be able to see it if you pull the blower motor

 

[whiplash15]

Most likely a vacuum leak or a toasted HVAC controler.

 

[Battery]

I'm not to sure about how to find a vacuum leak. Any suggestions?

 

[marked8]

I Forgot about the self test on the climate control unit. I believe the correct procedure is to press the floor and off button at the same time, then press auto a few seconds later to start the test. The system will not run during the test. This is how I diagnosed the blend door motor problem on my 96.

 

[RedHotMark96]

In my mark air doesnt blow very hard out of any of the vents, but defrost feels strong. No difference between heat and a/c. Would this be a blend door problem?

 

[98LSC32V]

In my mark air doesnt blow very hard out of any of the vents, but defrost feels strong. No difference between heat and a/c. Would this be a blend door problem?

Yes.

 

[Markviiiedrea]

redhotmark96. The defult for when the HVAC is inop is for the system to blow defrost at full, I would try a new unit, just get one from e-bay for a 93-96 like 50 to 100 buck's.

 

[Battery]

Can anyone comments on how to go about checking for a vacuum leak? I'm still lost and it's not getting any warmer.

 

[Markviiiedrea]

Take a flexible tube (1/4 diameter) or an automotive stethoscope and move it around the engine bay (around the brake boost and vacuum lines) till you hear a sucking, hissing sound.