Intermittent clicking from dash vac pump
So I was able to get an early start this year on pre maintenance before we head to Florida this March. I had an issue with only having the defroster working on the the dash switch. After much headache, I was able to locate and fix the issue.
All of the functions seem to be working as they should but, I noticed what sounded like a solenoid pulsing. I was able to locate were the noise was coming from. As it turns out, I believe it to be the vacuum pump that controls the opening of the different gates for defrost, floor, ac, etc. I took apart the black box under gen compartment and found that it is actually air that is cycling intermittently. I don't believe that this is normal unless maybe I just never noticed it before? It is not a steady leak but more of a pulsating leak. only happens with the ignition on. Any ideas? I am going to try and upload a video when I get home so that you can hear what I'm hearing.
Thank you in advance!