Question about 1996 Jaguar Xj Series

3 Answers

1996 Jaguar XJ6 heater does not heat. It just blows cold air...

I can't get this old Jag to heat up, but don't want to spend a fortune on repair...What is the most likely simple/cheap problem, i.e. faulty switch or something?

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  • Anonymous Dec 19, 2009

    You are scaring me...are there two "heaters" in this car? I am referring to the heater that heats the passenger compartment...it is blowing only cold air...no hot air...presumably the thermostat is stuck open, but I wondered if there is some other simple explanation possible...thanks...

  • cock cock
    cock cock May 11, 2010

    DO YOU MEAN THE ENGINE OR THE INSIDE HEATER?

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All cars have what is called a heater matrix , this car has, it is inside the car behind the dash, the purpose is to provide heat in side the car, if the car is running at normal operating temp you thermostat is ok, the heater in the car is known as a heater matrix and will block up due to lack of use as water on passing throu when you have the heat on in side the car , hence the water leaves risidual that blocks it, if you keep a good level of antifreze/summer coolant in the systym it will prevent this, it is also the first palce to be affected when you lose water from the cooling systym, i will foward the detail how to clean it out, as removal is very labour intensive,

Posted on Dec 24, 2009

  • cock cock
    cock cock Dec 24, 2009

    IF ENGINE RUNS AT RIGHT TEMP SOUNDS LIKE YOU MAY HAVE AIR BLOCK, OR BLOCKED HEATER MATRIX, CHECK FIRST CHECK THE HEIGHT OF THE HEATER MATRIX IN THE CAB , IF ITS HIGHER THAN THE FILLER/EXPANSION TANK. THEN COULD BE AN AIR LOCK, LOOK FOR THE HIGHEST PIPE AND SEE IF THERE IS A BLEED VALVE, IF NOT TAKE BOTH PIPES OFF THE MATRIX FEEDS (TWO PIPES GOING FROM ENGINE BAY TO INSIDE OF CAR, AND FLUSH OUT WITH HOSE TO SEE IF IT IS BLOCKED, AND RECONNECT LOWEST PIPE FIRST AND FILL SYSTYM TILL WATER APPEAR FROM TOP AND RECONNECT RUN MOTOR, AND KEEP TOPIN UP, YOU CAN BY A COOLENT FLUSH SOLUTION TO CLEAN THE SYSTYM OUT

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Check out the auxiliary water pump - it is located on the left hand side under the bonnet near the bulkhead.

Here is a link on the repair :

http://www.jagrepair.com/HeaterPumpMotor.htm

Regards
Nick

Posted on Nov 02, 2012

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The problem is that the heater pump has failed. This is a small electric water pump that's near the brake master cyl. This circulates water through the heater core. ANY Jag mechanic should know this !!!! These things are about 200-300 bucks.

Posted on Mar 25, 2010

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