Heat Issue and the blowers are good lol

Reply Subscribe

Thread Tools

Search this Thread

09-27-2010, 11:10 AM

ArmyJag

Senior Member

Thread Starter

Join Date: Nov 2008

Location: McHenry IL

Posts: 855

Likes: 1

Received 6 Likes on 3 Posts

Heat Issue and the blowers are good lol

So the heat comes out fine and strong but only out the vents and defrost. I am getting air out of the foot well vents but it's ice cold. I'm assuming it's a blend door issue in the dash, but before I went tearing into the dash again, I wanted to see if anyone else had tackled this issue and what they found the problem was.

Reply Like

09-27-2010, 12:38 PM

carelm

Veteran Member

Join Date: Jan 2009

Location: Fairfax, VA

Posts: 3,327

Likes: 20

Received 166 Likes on 134 Posts

ArmyJag,

I found this on another site on XJ40s. I hope it works. It could also be a vacuum line issue though. Years ago when I had a '90 XJ40 I had a similar problem, but I just taped up the offending flap so I wouldn't get cold air.

http://www.xj40.com/index.php?sid=ff...5086582cecfe4c

Quote:

Now that Autumn's here i of course expected when i wanted warmth i would get it , to my horror the best car i have decided that i wasn't going to have any on my feet
Hoping it was just a sticking lower blend flap i removed the drivers knee bolster and proceeded to gently tap the servo motor housing and viola i had my heat back

The motor housing is situated under the piano shaped heating ECU the one with the three white connectors

If tapping didn't work the next thing would be to remove the ECU to gain access to the housing and remove it , you can then turn the flap manually to free it up ,

Reply Like

09-27-2010, 12:49 PM

ArmyJag

Senior Member

Thread Starter

Join Date: Nov 2008

Location: McHenry IL

Posts: 855

Likes: 1

Received 6 Likes on 3 Posts

Thanks, I'll give that servo a poke with a stick here in a bit and we'll see what happens.

Reply Like

09-27-2010, 02:42 PM

Translator

Veteran Member

Join Date: Jul 2009

Location: Brittany France

Posts: 12,704

Likes: 181

Received 1,231 Likes on 716 Posts

Army, please post up your results, in all the years that I have run this XJ40 I have NEVER realised that you could even get heat to your feet! brrrr.

And as far as I am aware on the one I can drive, the other is well er, flat'ish, all the heater systems are working fine.

Reply Like

09-27-2010, 05:50 PM

ArmyJag

Senior Member

Thread Starter

Join Date: Nov 2008

Location: McHenry IL

Posts: 855

Likes: 1

Received 6 Likes on 3 Posts

I will but I decided to feel like butt tonight instead of working on the car so right now I'm laying on the couch eating chicken noodle soup.

Reply Like

09-29-2010, 07:56 PM

ArmyJag

Senior Member

Thread Starter

Join Date: Nov 2008

Location: McHenry IL

Posts: 855

Likes: 1

Received 6 Likes on 3 Posts

The flap isn't actuating when the heat is turned on. It is failing on both sides so I'm going to have to do a little electrical trouble shooting. Unfortunately this is back burner now with the o2 sensor issue.

Reply Like