==== How to change from cooling mode to heating mode ==== To swap from cooling to heating you need to: 1. On the big water tank in your utility cupboard: - press the left hand round button - turn the button until it says "Space heating/cooling" - press the left button once - it should then display "Operation mode" - press the left button once - ensure "Heating" is highlighted in blue - press the left button once - press the home button in the middle. 2. On the square Daikin controller in your lounge: - press the + button until it shows 25C 3. On the room temperature controller: - press and hold the sunshine/snowflake button until the display shows the yellow sun - press the + button to select the temperature you want You will need to wait a while (maybe an hour) until it fully swaps mode.