Please I need assistance, just bought the car and do not know much about it. Car ran fine on test drive and first week. Now temp gauge jumps up and upper radiator hose looks sucked in, any idea what may cause this? Last night concern was intermittent, blew hot air some times cold. Upper hose appears spongy. Should I be looking at T-stat, Radiator cap, upper hose, Water pump?
Any help will be greatly appreciated, thank you