Question about 1995 Chevrolet Lumina

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Heater core leaking out side the car. Only when hot. Even if the fan and hot air is off.

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Check heater hose's, possible leak. A pressure test would be best.

Posted on Aug 30, 2010

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1 Answer

Heater in side car is not working


If hoses are correct, then the heater vave or duct door motors are bad. If it is cable operated check the cable.

Apr 24, 2014 | 1994 Buick Century

1 Answer

I have no heat I have a new thermostat and the heater core dosent leak.


When you say you have no heat is this referring to nothing when control is turned on? Does fan work? or you have no hot air at all.
If no fan could be a blown fuse [blower motor] thermostat could be installed incorrectly or faulty. Could be a faulty heater control valve if you have one not allowing hot water into heater core.

Jan 26, 2013 | 1987 Chevrolet Cavalier 4 Door

1 Answer

Running hot when car is't in motion


1.check coolant level---must open bleed valve above thermostat when adding coolant. 2. Are fans radiator fans running when car ovrheats & is air comming off of radiator hot? 3. Check/Replace thermostat. 4. There is a plastic elbow that connects from the intakke manifold to the engine block on the passenger side of car that arrre notorioous for cracking / leaking.... 5. The heater core on `05 Impala does not close when heater is turned off so does not benifit overheating by turning heater on.

Jan 12, 2013 | 2005 Chevrolet Impala

1 Answer

Why would my fan blow but not blow hot air?


Locate the heater hoses and feel for temperature.Should be warm to the touch.
There may be an external heater control valve next to the firewall that is either vacuum or cable controlled.
the lever on the side opens and closes: warm coolant going into the heater core,inside the cab. If the valve is stuck,no heat.
If the vacuum to the valve is ZERO,it should open.
If the heater control vacuum hose is leaking air,you should get hot air ALL of the time.
people in the winter want heat NOW. Bypass the heater valve,under the hood with a section of copper or plastic tubing.
Even if the heater core is partly plugged up,you will still get some heat.
If the control valve is stuck closed: NO HEAT.
Listen under the dashboard for a hissing sound.That may be the problem for the control valve not opening.(Turn the fan off)
I'll assume this is a late model truck.

Nov 26, 2012 | GMC Sonoma Cars & Trucks

2 Answers

Leaking antifreeze between firewall and motor on passenger side. just started when i tried to use the heater. could it be the heater core and where is it located


Could be the heater core, or where your heater hoses connect at the firewall. Heater core leak would more than likely put steam in the vents of you car when heater is on and hot and fan on. If the leak is just in the engine compartment, it`s a hose or a loose connection.

Apr 18, 2011 | 2002 Pontiac Montana

1 Answer

Smells like anti freeze and smokes alot when given gas and also smokes when idleing under the airfilter on the passenger side of an 1990 supra yo


If there is white smoke coming out of that location, chances are that you have a heater core leak. Hot radiator fluid passes through 2 smaller radiator tubes to the heater core. Air from the fan is passed over the heat exchanger, and hot air blows out. White smoke = steam. You can block off the heater core tubes until you can get it replaced.

Nov 23, 2010 | Toyota Supra Cars & Trucks

3 Answers

We just bought a 1999 GMC Jimmy and the heater doesn't work. The fan blows but there is no heat. The air conditioner works fine.


Could be that the heater core is disconnected, there are two hoses that attach to the heather core that come out of the engine, this provides hot water to the core thus making the heater work, when the heater core starts leaking water the quick and fast fix would be to bypass the heater core and connect the two hoses together, check under the hood on the left passenger side there should be two hoses about 1" thick see if there are connected together or of they seem to be connected to 2 outlets that come out of the inside of the vehicle. people do that specially if selling vehicle.

Sep 06, 2010 | 1999 GMC Jimmy

2 Answers

Only getting lukewarm air from heater even with new thermostat


1. maybe your ac condenser blower is not working properly
2. slipping ac belt
3. air con compressor hub is sliding due to oil leak

Dec 10, 2008 | 1994 Subaru Legacy Outdoor

2 Answers

No hot air FROM HEATER inside 2000 318IA


Hi There, If the fan blows only cold air, then you might have a restriction on the heater core. The heater core is like a small radiator inside your dash. The coolant flow through it can be restricted by corrosion. The lack of flow of coolant through the heater core will result in a lack of warm air inside the car. Flushing out the heater core may help. If not, you will have to replace it. I would say though, 80% of the time the cause is just restriction. Get the heater core flushed and I am sure you will get your heat back. MIke

Nov 05, 2008 | 2000 BMW 3 Series

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