Best Answer

the heater control valve it stuck closed for some reason. Check for a broken vacume line between the heater control to the valve. With the engine running check for a good vacume at the valve with a vacume gauge it should be close to the same reading as the engine vacume. If all is good then the valve is bad GRUNGE BUILD UP ON EVEAPORATOR (CAUSED BY LEAK) AND BLOCKS INCOMING AIR TO HEATER CORE AS IT IS IN FRONT OF IT. YOU WILL HAVE TO PULL THE EVAPORATER TO CHECK. I KNOW OF 2 INSTANCES OF THIS ALREADY INCLUDING ME ; ) GOOD LUCK. There is a seal that sits behind the heater core and fire wall where the hoses connect to the heater core. You can get an air leak there and cool air will be produced by your heating system. To check: with blower running squeeze your hand down by the heater hoses in the engine compartment. If you feel air coming from the blower motor then you will need to seal the leak. you also have a seal that is on the inner cover to the heater box that covers the heater core. That can cause some air leaks also.

User Avatar

Wiki User

2009-02-01 17:53:32
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: Why would no heat blow from the vents of a 1992 Chevy Lumina even after replacing the water pump thermostat heater core hoses radiator?
Write your answer...
Related questions

Why would the coolant light come on and the heater blow cold air in a 1985 Cadillac Deville 4.1 even after you tried replacing the thermostat and flushing the radiator?

Heater core (radiator) needs to be cleaned or changed

How do you stop Chevy lumina 95 from runnuing hot?

Replace the coolant, thermostat, turn off the A/c, in emergencies drive with the heater on, increase the air flow through the radiator, have your radiator checked for blockage.

After replacing new heater core and connection all door valves you still have no heat?

Your thermostat might be stuck open. Does the radiator cap get hot after running the engine for 10-15 minutes? If not, replace the thermostat.

Why does my truck overheat and then when I set the heater to defrost it cools down?

Check the thermostat or the radiator. The thermostat could be sticking or the radiator could be plugged.

After changing the thermostat you still get no heat in your 1997 lumina?

could be several things. have you tried replacing the heater core. if not that, call a mechanic. you probably won't be able to fix it unless you know what you are doing.

What happened to a 1992 Chevy Lumina if it ran hot and all the antifreeze drained out?

Maybe a stuck thermostat, or a broken radiator/heater hose. Sometimes the radiator itself blows a seam. Water pump seal, blown head gasket, etc.

Where is the heater core temperature thermostat?

The temperature of the coolant entering the heater core is controlled by the engine thermostat. The engine coolant thermostat is generally located at the engine end of the upper radiator hose.

1993 Chevy Lumina heater not blowing warm air?

Change your thermostat. Mine had the same problem and it was stuck open.

Why should your heater fan be off when you burp your radiator?

It will take a little longer for the cooling system thermostat to open up if the heater fan is on. The heater fan and heater core act like a small radiator and disperses heat energy when in operation.

Is the thermostat the problem when my 1998 Pontiac transport overheats and the top radiator hose isn''t getting hot and the heater blows cold air?

It could be the thermostat. Open up the radiator cap when it is hot and see if the water is flowing in the radiator. If it is not then it may be a thermostat.

What would cause a 1995 Suzuki Sidekick not to have heat after replacing the thermostat and radiator and all the hoses are connected?

test flow in and out of heater core it may be plugged or need replacing, if it is not plugged up check temp controls, may be stuck in vent or a/c setting.

What would cause cold air to blow when the heat is on in your 1989 Dodge Dynasty even after replacing the radiator and thermostat?

most likely you dont have enough coolant to reach heater core. make sure your full

No heat after replacing heater core and thermostat?

You may have an air lock in the heater pipes some vehicles are fitted with bleed screws for this purpose.

Why doesnt the heater on your 1999 Chevrolet suburban work?

Could be: Low coolant in the radiator - or - thermostat stuck open - or - heater core plugged.

1993 Wrangler new water pump new heater coil new radiator getting poor heat from heater?

Your heater core is plugged and you need a thermostat.

Heater has mind of its own goes hot then cold and hot occaisionally. flushed thermostat.radiator.blender door actuator mechanic clueless.still problem. could be heater control itself?

the heater control has a thermostat for the heater only. that thermostat needs replacing

Where do the heater hoses go on 97 crown Victoria?

the heater hoses usually lead away from the thermostat and go into the fire wall. On the other side of the firewall is the heater core. the top hose on the radiator goes into the thermostat most of the time

Why would there be no heat in 1985 Nissan Pickup before and after replacing thermostat?

you might need a heater core

Where is thermostat that controls the heater on a 2000 Chevy Tahoe?

follow the upper radiator hose, that should lead you to it.

When replacing heater core in 1995 f 350 does freon have to be removed?

No there is no freon in the heater core just antifreeze. The heater core is nothing more than a tiny radiator.

What is the layout for radiator hoses on a 1990 Chevy Astro van?

one large hose from bottom of radiator to side of water pump. other large hose from thermostat housing to top of radiator. one heater hose from water pump to heater core, I think this one has a Y in it if there is a rear heater other heater hose from heater core to somewhere on top the engine. If there is a rear heater, its return hose goes to a fitting on the radiator.

Why would a 1997 Chevy cavalier leak coolant?

Leaking radiator radiator hose head gasket water pump Heater core thermostat housing

Why is my s10 blazer not heating?

could be a bad thermostat try replacing it answer try flushing out your heater core also

Vauxhall corsa heater only blows cold air?

check the thermostat dude may need replacing

Why is your car overheated but radiator full of water heater blowing cold air and knocking sound?

Have you checked your thermostat?