RuckIt

I pneumatic seat pump is cycling about every 30 seconds for a few seconds at a time, then it heats up too much and turns off until the car sits for a bit and it can cool down. This happens even if all my seats are set for zero calls. Does this mean the pump and or the reservoir is leaking? Or is air being fed to the seats all the time and then the valves just control what is being inflated or not? Trying to pin point where I should be looking for a leak as I can't hear anything obvious. Bought a stethoscope to hopefully help me out. 2007 S65.

Thanks!