Indoor unit shows E20; condensate water may overflow or unit may shut down in cooling mode

Safety: Turn off power before working near water and electrical components.

Steps:

• 1. Check drain outlet: Locate the condensate drain hose and ensure it is not kinked, elevated too high, or blocked.
• 2. Clean drain line: Use a wet/dry vacuum at the drain outlet to suck out sludge and debris. Flush with clean water if accessible.
• 3. Inspect float switch: Open the indoor unit's drain pan area. Check that the float moves freely and is not stuck by dirt or algae. Clean the pan and float.
• 4. Test pump (if fitted): Pour some water into the drain pan and restore power. The pump should start and remove water. If it does not run, the pump may be faulty.
• 5. Replace faulty parts: Replace the float switch or drain pump with Baxi-approved components.