Afternoon all,

I have searched this forum as well as many others and found a couple similar situations but no resolutions. I have a 98 V70 XC with EEC. First noticed that the passenger side would only blow cold air, pulled codes and found cabin sensor and re-circulation codes, but no lights were flashing. I then pulled and test and then replaced the cabin sensor and the arm from the damper motor to the recirc door which had broke. Tried to calibrate the motors and it either fails immediately or says complete immediately. I now have no heat anywhere and flashing AC light. The code that keeps coming back is ECC 236 - Recirc damper signal low. I have pulled the damper motors and left the scan tool up, and the scan tool reads correctly when making changes to the control head but nothing on the motors. I have 11.95V going into the ECC control unit(head) and 4.93v - 4.95v on the signal wires coming out to each damper motor. Check the ground, swapped motors around, checked both ambient temp sensors, etc. From what I understand about this ECC system, if one thing does not work, nothing will.

I am at a loss and getting frustrated. Has anyone ever come across a situation like this before? Any help or insight would be greatly appreciated.

Thanks in advance, Dave