Having trouble with HVAC blower, works intermittently. AC cold Blower works intermittently shuts down whenever

Have replaced O rings in EATC Worked ok for couple weeks now only works "when it wants too"

What tests are available for EATC?

Any help is appreciated.\\

 

There is a module that replaces the blower motor resistor mounted into the firewall, passenger side, below the heater hoses. This module is most likely the cause of your problem.

Good Luck, Bill