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I have the same problem with my 99 Malibu heater... I'm not sure what the cause is, but I have found that if you run the heater in the recirc mode for a little while, it will start to heat up after 5 to 10 minutes and you can switch it back to the fresh air mode.
My Malibu also used to run hot after it was about 6 years old. I found the radiator and block had a fair amount of sludge from that "lifetime" coolant GM uses. I flushed the engine and radiator till it was clean and replaced it with regular anti-freeze. Hasn't been a problem since.
What else can I help you with?
Air conditioner on 1998 Chevy Malibu blows hot air?
the system is probably out of coolant.
Why is your 2000 Malibu Fuel injector fuse blows?
check wiring to injecters,sounds like a short.
Why Mitsubishi heater problem?
Whats the problem? Blows cold air with the heat settings on?
You have a1994 Toyota Paseo that overheats after driving for awhileI have change the thermostat radiator and cap but it blows steam from under the cap?
probably need new head gasket
How can you tell if your head gasket has blow in your Mitsubishi spase runner?
Blows cold air through the heater. Overheats. Bubbles/oil in radiator. Check spark plugs for condensation on plug tips.
94 BMW 325i overheats and heater blows cold air replaced thermostat water pump and flushed system what's the problem?
My guess is the head gasket, have same problem. Nightmare
Car that blows white smoke out tailpipe whats could be wrong?
sounds like you need a new head gasket
If your air conditioner blows from the floor and not the vent of a 89 Chevy caprice whats wrong?
is it possible that the vent hose are disconected?
What is the tightening sequence and torque for a rear head on a 2000 Chevy Malibu V6 3.1L?
IF YOUR CAR LEAKS WATER AND HEAT BLOWS COLD AIR WHAT THE PROBLEM
A 1994 Dodge Viper overheats but coolant in the expansion tank is ice cold. What could be wrong?
I will say you have a crack in your radiator and once up to pressure a seam blows out your water. I would check along the side.
How do you fix the heater on a 1994 Cadillac Sedan Deville?
AnswerDepends whats broken ie. blows cold, no blower at all ???????no blower at all
Your kia Rio overheats and blows out cold air you changed the thermostat But still have the problem?
You have not bleed the air out of the system after you installed the t-stat, causing the heater not to work and the engine to overheat. Use a coolant filler that screws into the radiator and get the air out
