Everything was working great until I went to do a random test and noticed instead of the green light, I got a red light in it's place (not the low level light). So I got into 6-7lbs when it is suppose to start kicking on and I noticed instead of the green light I would get, I got a red one in its place. So I let off immedialty and haven't gotten back into it. Poped the hood and heard what sounded like gurgling liquid coming from the pump, but couldn't see anything leaking. Now I left my manual at the shop on accident so I can't reference what this means. Am I losing pressure somehow and thats what the light means?