# Home A/C question **URL:** \ **Category:** PittSpeed Off Topic\ **Created:** [July 17, 2008, 2:34pm UTC](https://forums.speedlife.net/t/home-a-c-question/198581 "2008-07-17T14:34:21Z")\ **Posts on this page:** 1\ **Showing post:** 7
**Author:** ![Bravada\_442](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/bravada_442/32/5982_2.png) [@Bravada\_442](https://forums.speedlife.net/u/Bravada_442)\ **Post date:** [July 17, 2008, 5:21pm UTC](https://forums.speedlife.net/t/home-a-c-question/198581/7 "2008-07-17T17:21:30Z")
> [@Networking nerds enter](https://forums.speedlife.net/t/networking-nerds-enter/37144/19): > > Here’s a picture of what’s in there. I assume the cylinder at the top right is the capacitor. A couple of the spade terminals have some corrosion. Maybe clean those up? Does flipping the breaker kill **all** the power or does the cap need to discharge first? I don’t want to start pulling hot wires! > > I can hear a slight electrical hum in the condensing unit when I turn the thermostat on and the furnace blower is going. > > Not sure what contactor you mean. > > If I don’t get anywhere in the next hour I’ll just call someone to come out. Sounds like a contactor. But damn is that cap rusty. I don’t believe flipping the cap kills all the power, I believe the cap will hold some power in reserve. If you don’t get anywhere and need to call someone out, PM me. I can try my best to get someone out tomorrow or Sat at the latest. --- _[View the full topic](https://forums.speedlife.net/t/home-a-c-question/198581)._