Controls for the heating and A/C will stop working

ROBERT M. FEMINO

MEMBER
2000 ACURA TL

My controls for the heating and A/C will stop working then start up for a while then off. It keeps going back and forth. It like there is a breaker that keeps turning off and on at will. We have no control of the system. The Auto sign comes on and the system shuts down.

1 Reply

KHLOW2008

MECHANIC
41,814 POSTS

Hi Robert,

Symptoms indicates a possible fault with the AC control panel.

System comes with self diagnostic functions. Check if you have any trouble codes

Running the Self-diagnosis Function

1. Turn the ignition switch ON (II).

2. Press the AUTO button and then the OFF button. Continue to hold both buttons down for 1 minute.

3. If there is any abnormality in the system, the temperature indicator will light up the segment (A through N) corresponding to the error. The temperature indicator will then alternate every second between displaying "88" (all segments lit) and the error code segment (A through N).

NOTE:
The system will only display the DTC when the AUTO and OFF buttons are pressed. If you release the buttons, the display will go blank. To return the display, simply press the AUTO then the OFF
buttons again.

If there is no abnormality, the segments will not light up.