been trying to fix my heat for a few weeks now after buying a 1997 xj6L, it is winter here and the car will only blow cold air (close to what temperature the air is outside), the inlet hose going to my heater core gets warm after turning the heat on max however the outlet hose going to my pump is neither hot or cold. the guy told me the in cabin air sensor was broken however when i put heat to it the ohms began to drop which i believe is what you want to happen, i replaced the thermostat, began to flush my heater core which came out looking like brand new coolant so i stopped the flush, checked the brushes inside the heater pump which looked perfectly fine, however when i have the heat on i cannot feel or hear buzzing coming from said pump, my ambient air temp sensor reads a few degrees warmer than the actual temperature, and my coolant level fluctuates a ton before i start my car and while it is running (sometimes itll be below the min line, other times it will be right below the max). if anyone has any idea of something else i can try that would be greatly appreciated, thanks in advance!

 

Welcome to the forums kader,

When you have eliminated coolant flow issues as the possible cause, sticking flaps in the AC/Heater unit is the next one to investigate. Failed servo motors can leave them closed so there's no heat output.

Follow this link https://www.jaguarforums.com/forum/xj-xj6-xjr6-x300-26/ to the X300 forum for help, advice and information. The 'HOW TO' thread at the top is a good place to start for information on regular issues. You can also use the Canada Region forum by following this link https://www.jaguarforums.com/forum/canada-73/ to find other members in your region.

Please read the guidance for new members ( https://www.jaguarforums.com/forum/n...ned-up-241802/ ) which answers many of the most frequent questions about getting started.

Enjoy the forums.

Graham

 

Welcome to the Forums.

I will only say, mine had similar, not as cold as you are, but the filler pressure cap was dud, that sorted it.

As Graham said, more in the Tech Section.

Good luck.

 

welcome to the forum

 

Welcome to Jaguar Forums kader,

Good to have you with us.
Enjoy the forum.

If you haven't done so already you should add your car details to your signature to help others to help you.
If you need help with getting around and using the forum follow this link for some help Forum Help

 

Hello,
I'll bet you want heat in Alberta! I hope you get this fixed soon.
Welcome to the forums from ElinorB.
(';')

 

awesome, thanks Graham, ill give that a shot.

 

Welcome aboard.

 

Welcome to the forums.

 

Hey Graham, sorry for such a late reply. I ended up replacing both the servo motors located on the drivers (LHD) side of the HVAC unit. No difference in air temp output. Been trying to find out if there are more than those two servo motors on my car but can't find any info. If you know the correct number of blend door actuators my car has (1997 xj6L) that would awesome. Also curious, even though my in car temp sensor reads correct ohms for the heat applied could it be a possibility that it is somehow telling my HVAC unit that the cabin is at the correct temp? And if so how would a guy go about fixing that? Thanks again.

Kade

 

Kade,

You should be able to feel the pump working - it vibrates gently.

There's three temperature sensors involved (see items 1, 3 and 5):





If you have replaced the servo motors, I'd begin to suspect the control module (item 2):




Best posting questions in X300 forum for advice from members currently running this model. I'm on the fifth Jaguar since I sold mine.

Graham