finally got it fix

, how???
i left it the car for like a day on my driveway(kinda uphill) n reservoir cap off.
yesterday when i got back from work i went check the reservoir c if it needs water but it didnt so i open the hose the one on the top left Radiator, as soon as i opened it i heard puuuuoshhh, alot air came out so i add water in reservoir put everything back. Started the engine n heat, temp start rising and i could feel the heat works

.
so temp was close to 80 n good heat , working fine now.
i drove it this morning to work temp was around 80(little less)
and Thanks for your help guys