Take it apart and clean it.
Dyson hot and cold fan remote not working.
Your machine may be hot to the touch if it has been used as a heater in the last couple of hours.
If the power cycle does not work try a hard reset.
Please do not touch the sides of the loop amplifier until it has cooled.
Turn the power off and unplug the machine or switch off at the mains socket for 30 seconds and then turn back on.
Dyson am04 fan heater let s get your machine working.
Plug the machine back in and retest.
Not been impressed with this heater but closer inspection revealed a problem.
Turn the power off and unplug the machine or switch off at the mains socket for 30 seconds and then turn back on.