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Interior heat uses the engine heat. If the engine is still cold, the heater will blow cold. If the engine is warm and the heater is blowing cold, you have a problem with the heater. Check the water in the radiator and see if it is rusty. If it is rusty, change your coolant, thermostat, and hoses. Look at the heater hoses when someone steps down on the gas pedal. If a hose collapses, replace your heater hoses. Otherwise take it to a mechanic.
On top of the air conditioning accumulator (can), located on the passenger side of your engine not too far from the electric fan motor for your heater core/ air conditioning evaporator. It has a plastic dust cap covering the valve.
add water to the radiator. believe that. if there is no water flowing through the engine, your heater will only blow cold air. if there is no water flowing through the engine and your heater is only blowing cold air, and not HEATING, your heater core is probably going out or will be soon. most people believe that if you have no water in the engine then your temperature gauge will run hot and you will know that you are overheating the engine. WRONG! your temp gauge only measures WATER temp. But if there is no water to measure, there is no temperature rise showing on the dashboard gauge. if you have NO WATER in the engine you can seriously overheat your engine and not know it because the gauge is not getting any hotter than usual (sometimes your gauge will even read cooler than usual).
It is a white plastic pipe approximately 5/8ths to 3/4 inches in diameter and approximately 42 inches long with a slight flare on one end.
the heater is a charmglow gas ventless wall heater
The engine block heater on a Dodge Caravan could be in a number of places. However, the cord for the electrical connection should be near the battery.
if you see no plug than it has neither one you have to pop out the frost plug and put in a block heater
it is in the heater hose close to the firewall near the master cylinder its a black plastic valve with a vacum hose connected to it
The heater would not be working on a 1990 Dodge Grand Caravan if the heater core is damaged or blocked. Hot coolant from the engine must flow through the core to allow hot air to pass into the cabin.
In most cases a block heater replaces one of t he freeze plugs in the engine
O2 sensor Heater Bank 1 Sensor 1
The heater core is just below the top of the dash, below the A/C condensor behind the radio. You will need a manual, and a good aftermarket heater core of 100% aluminum. The factory one is half plastic that is why the plastic tube(s) broke coming out of the firewall and dumped coolant behind the engine. Jake McCahn
Behind / below the glove compartment area inside a plastic case . You can see where the heater hoses connect to the heater core at the firewall in the engine compartment
Usually at the passenger's side inner fender
Behind the glove compartment area inside a plastic case . From the engine compartment you can see where the two heater hoses connect to the heater core at the firewall
The Dodge Caravan heater was invented in 1984 by the Dodge and Mopar companies. Since it's creation it has evolved into a much bigger and popular van.
If someone needs information about replacing a caravan heater, can be found on the Camping and Caravnning Club website, a website dedicated to caravans.