R32 A/c Front Defog

[ColdFusion]

Did a search and couldn't find anything...

I can't seem to get the front defog mode to work on the climate control. Everything else seems to work fine, just when I push that button nothing happens. I know it used to work a week or so ago and I doubt it could be a fuse as it's just the one button not the whole unit.

I did run a diagnostic and the light for the button works and also the motor/flap works when I do the vent test as I can feel air go to the top vents, but just doesn't work when I push that button.

Anyone know what's going on or if I'm going to have to pull the unit out and fiddle?

[ColdFusion]

Ok after driving for around 20 minutes last night I tried the button and it works again -_- and worked multiple times. Didn't work when I first got in the car though so I left it until around 20 minutes later.

May just be a dry solder where the switch is soldered to the board. Will test again when I have to go somewhere.