This is how to put a Slimline RF V3 into manual mode, disabling the preprogrammed times and temperatures.
- Hold down the power button for 3 seconds to turn the unit off
- Hold down the clock button until you see 00 01 on the screen
- Tap the clock button until the small number goes to 10
- Press the down arrow to make large number 00
- Tap A
- Tap the power button.
This will not apply if the thermostat is doing heating and hot water.