# HVAC help **URL:** \ **Category:** PittSpeed Off Topic\ **Created:** [May 31, 2007, 3:19pm UTC](https://forums.speedlife.net/t/hvac-help/190257 "2007-05-31T15:19:57Z")\ **Posts on this page:** 1\ **Showing post:** 6
**Author:** ![STEELCITYEVO8](https://avatars.discourse-cdn.com/v4/letter/s/d9b06d/32.png) [@STEELCITYEVO8](https://forums.speedlife.net/u/STEELCITYEVO8)\ **Post date:** [May 31, 2007, 7:00pm UTC](https://forums.speedlife.net/t/hvac-help/190257/6 "2007-05-31T19:00:42Z")
> [@This is why i hate cobalt ss drivers](https://forums.speedlife.net/t/this-is-why-i-hate-cobalt-ss-drivers/27102/117): > > I’m no HVAC expert, but is this the first time it’s been on this season? If it needs charged, would that keep it from coming on? The only time that the freeon charge would be an issue on it not runnin would be in a very high end condensing unit that would have a low pressure switch. If pressure within system drops too far it would open the switch not allowing the control circuit to be completed. wich prevents the unit from running --- _[View the full topic](https://forums.speedlife.net/t/hvac-help/190257)._