Amana air conditioner displays E6 and will not respond to remote or keypad commands properly.

Safety first: Disconnect power before accessing the control compartment. Static discharge can damage electronics; ground yourself before touching boards.

Steps to address E6 (communication error):

• Remove front panel: Take off the front grille to access the user interface and control board area.
• Inspect harness connections: Locate the multi-pin ribbon cable or harness between the display board (keypad) and the main control board. Unplug and firmly reseat both ends several times to wipe oxidation from the contacts.
• Check for damage: Look for kinks, cuts, or burn marks on the cable. Replace the harness if any conductors appear broken or insulation is compromised.
• Examine boards: Inspect both the display board and main control board for signs of corrosion, insect damage, or burnt components. Light dust can be removed with compressed air.
• Test operation: Restore power and test all buttons and modes. If E6 persists, replace the display board first (most common), then the main control board if needed.

Handle circuit boards only by their edges and avoid touching soldered components to reduce static damage risk.