Why would my 2004 Toyota Camry have low or intermittent heat?

Answer 1

If the heat only works when you hit the gas then you either need to add antifreeze or replace you thermostat and radiator cap. My family and I have had plenty of Camry's since our original 1986 Camry. Since the early 90's they all used the same radiator cap, all of which we've replaced at one time or another. Give those simple things a shot first.