Sounds to me like you have a leaking head gasket. Take the car to a good mechanic and have him check it out.
Tough to narrow it down with such little detail, but it sound like your car's thermostat may be malfunctioning and not controlling the temperature correctly.
Warm, Boiling, Baking, Steaming, Burning, Steaming, Smoldering, Stuffy
if the coolant in the overflow rises and overspills when you shut the car off or is boiling in the reservoir
steaming, boiling,
It can be, as in a steaming bowl of oatmeal. Steaming is the present participle of the verb (to steam) and may also be used as a noun/gerund as in "Steaming vegetables retains more of the vitamins."
The water and coolant is put in the coolant reservoir for the location of this refer to the owners manual. It is best to do this when the engine is cold otherwise you run the risk of getting boiling water all over you. the mixture of coolant to water should be about 50/50.
steaming is cooking food in the water vapour from boiling water it can be done in;deep saucepan , a wok, a steamer
roasting, steaming, boiling, frying, baking
The heat is not working because you are very low on coolant, probably because of the leak. Seems to me that it should leak worse when it is running, so I am going to assume you are talking about the coolant overflowing the reservoir, in which case goes back to you being low on coolant and the engine boiling the coolant.
steaming?
When you steam the lobster, it is placed in a basket above a pot of boiling water. When you are boiling the lobster, it is placed directly into the boiling water.
== == Sometimes it is not actually "boiling", but bubbling. Start by getting a new radiator cap. It is the first thing you should do, and is easy. *MAKE SURE YOUR CAR IS NOT HOT WHEN REMOVING A RADIATOR CAP* When air enters the closed/pressurized cooling system, the air ends up in your reservoir tank and bubbles the top. Sometimes(depending on vehicle) it will even exit the reservoir tank through an overflow hose and appear to be a leak. Hope this helps! Chris not enough water or coolant in radiator.