Topside control buttons are unresponsive or some buttons work intermittently.

Safety first: Turn off power at the GFCI breaker before disconnecting the topside.

• Inspect overlay: Look for cracks, bubbles, or water under the keypad overlay. Moisture can short the contacts.
• Check cable connection: Remove the equipment bay door and verify the ribbon cable from the topside is fully seated on the control board and free of corrosion.
• Drying attempt: If moisture is present, gently dry the area and allow the panel to sit in a warm, dry environment for 24 hours, then retest.
• Replace panel: If buttons remain intermittent or dead, replace the topside control with a Marquis-compatible unit.