I had the same problem with the ppm 2 with the air 4 I had to ditch the air 4 I got rid of my intake/exhaust upgraded to a bigger ac sealed the shit out of everything and finally it works great you just have to mess with evrything to dial it in. Also does your ac have a built in thermostat or is it the old school type with the manual thermostat. If its the new type you can't have it plugged into it because most won't restart.
u.g.u Reviewed by u.g.u on . cap xgc 1 Anyone using one of these. i just bought one used off ebay and having some problems. basically the exhaust fan never turns off which causes the co2 to never co0me on. Even when i set the temp gauge way higher than the room temp, the ac still stays on. i hope i didn't buy a dud. any suggestions to try? Rating: 5