124 climate control unit and auxiliary water pump
I have been having trouble with the climate control system and was advised to check the auxiliary water pump. Not having time to do so right away, I just disconnected the wire to the pump. Still have problem, but the heat/cooling still worked. I thought that if the pump was disconnected that there would be not much heated water coming into the heater coil, but there seems to be plenty. Is there another one of this little suckers in the system? If not, why bother keeping the pump active, especially when it can damage the CCU?
As for the overall problem, until the car is driven several miles, the outside air exchange keeps cycling off and on. Can hear clicking like a relay going on and off in the dash on the passenger side. Any thoughts on what this is other than replacing the whole climate control unit?
Any thoughts appreciated - RMF