I was cleaning up the backyard late last night
and found two white cables disconnected from each other.
I tried touching them with my hand but didn't get shock or anything. I connected each other but nothing happened (AC or heat wasn't on). Is the red cable near by a hot cable?
The wires go to a blue filter device (UDK-053s). It seems like a dried clean filter of some sort.
Is it required? If so, does it need to be protected from water, etc.. I have a new HVAC unit about 2 years ago and it looks like this device came from the one I just recently replaced.