A/C - heater controls have gone dead

[kommisar89]

Hi All - I tried searching for this but didn't come up with anything that seemed relevant. My A/C - heater controls have just gone dead. I have a 1999 Mazda B4000. There are two control knobs, one for fan speed and one to select A/C, heater, or defroster function. A couple days ago they just stopped working. There was no sound or smell that I noticed. They were working the night before but that morning they were completely dead. I notice that when I place the selector switch in the A/C or defroster position the A/C compressor clutch does not engage and that combined with the fact that the fan isn't working make me think there is no current getting to the switch. Is there a fuse or relay I can look for? Thanks.

-Derrick