Hey all! We had our first cold snap here in Virginia and noticed a weird issue with the heat in my 2004 XJ8. I did a search, but didn't see anything similar posted.

After the car warmed up I turned on the heat and the car wasn't getting warm. I started messing with vents and settings and it seems cool air is coming from the driver's side vents and rear vent and hot air is coming from the passenger side vents. Even with dual off and both sides set for 80 degrees, only the passenger side blows hot.

Anybody have similar issues or know of an issue with this? Thanks in advance!

 

There have been several threads about this and it seems that it's usually due to a blocked heater matrix/core. Do a search using 'Search this Forum' at the top of the Forum page using 'blocked' 'core' 'matrix' and 'heater' as key words; that should throw up something.

 

This is a well known fault as Patrick has said it's due to a partially blocked heater

core.

You will need to drop and maybe remove glove box to replace it.

I have never had to do this job but I would suggest you leak check before replacing

the glove box since the fittings on the core (in and out) look pathetic.

 

Before you start to mess with heater core just swap for new aux pump. It solves the issue by 105%. And yes, you definitely didn't use the Search button, the topic was discussed million times

 

Thanks for the replies, everyone.

I really did try to search! Didn't get anything relevant searching for "climate control" or "heat". Thanks for the tips.

 

I have found by experience that it is better to search using google.