2 flashing lights (Red / Green)
A flashing red and a flashing green light when the machine is in use indicates that it has overheated. This could occur if the filters need washing, your machine is blocked or if your machine has been left in direct sunlight or in higher than normal temperatures. Check filters, look for blockages and leave for at least 1 hour to cool down, before restarting.
Any non-domestic use may adversely affect the filter performance, such as vacuuming builders dust.