Poor grounding in an air conditioner panel may cause unstable operation or even malfunction. First, check whether the grounding wire is intact and free of exposure or insulation damage. If any issue is found, replace or repair the grounding wire. Next, confirm that the grounding terminal is securely connected to the internal panel, and retighten the screws if necessary. In addition, use a multimeter to test the grounding resistance; if the resistance value is too high, clean the contact points and ensure there is no rust or contamination at the connection, then retighten and test again. If the problem still persists, it may be necessary to inspect the internal circuit board for other faults and replace it in time. By following these steps, poor grounding issues in air conditioner panels can be effectively resolved.