Heater water valve operation


(jerald) #1

Hello can someone explain how the denso electric water valve for the heater core works? This is on a 1996 XJ-12. Is it a variable valve? Thanks


(Robin O'Connor) #2

A good explanation here;
http://jimbutterworth.co.uk/8jagpump.htm


(jerald) #3

Robin …great help many thanks …just what I was looking for.


(Jeff Watson) #4

Another point Jerald is that the heater valve is open when power is off and powered closed.

With the engine hot and running feel the hoses on both sides of the valve to check it’s operation.

Cheers,
Jeff.


(jerald) #5

Thanks Jeff, I will check tomorrow. Best Regards