One the the most typical (and inconvenient) troubles with the Chevy Malibu is once it has actually no heat coming from the heater. Not having a work heater renders driving much less comfortable, and also can it is in a sign of specific issues.

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At the most basic level, there are two main reasons why the heater is not working. If it’s not coming on at all, it’s typically either the blower engine or some various other wiring issue. If the heat is blowing, however blowing cold, it has actually something to execute with the coolant getting to the heater core, or the heater main point itself.


Malibu No Heat: how the Heater Works

At the simplest level possible, the heater works by passing hot coolant native the engine right into a tiny radiator dubbed the heater core. At this point, the blower motor blows air throughout the it and also the newly heated air blows on to the driver and passengers. If the heater has stopped functioning in her Malibu, this process has failed in one method or another.

Chevy Malibu Heater not Working: Diagnosis

A indigenous of caution: If over there is no coolant in your overflow, you have the right to refill it by adding much more to the overflowreservoir. Over there is nearly never a case where you would must take the radiator lid off the the radiator to include coolant. The exception to that would be once you would have actually reason to think that the water tap going indigenous the reservoir come the radiator is clogged. At any time you’re placing your hand approximately the radiator or fans in the engine assume the they space hot and also that the fans have the right to kick ~ above at any type of time, also without your key in the ignition.

Low Coolant

While not having sufficient coolant may make your engine run hotter, the can additionally cause her Malibu come not have the ability to create enough heat. Is over there isn’t sufficient line pressure, due to low coolant, then the heater core will certainly not be able to get any kind of coolant itself.

You have the right to verify this by check the coolant level by acquisition a peek at the overflow reservoir. The overflow reservoir will certainly be connected to the radiator through a pipe coming native the height (usually right by the radiator cap). The should have separate currently to indicate “cool hot” and also “cool cold”. Part vehicles only have complete hot. Never touch the radiator cap unless the vehicle is ice COLD.

Bad Thermostat

The task of her Malibu’s thermostat is to regulate the temperature the the engine. That does this by enabling water to enter the engine when it is gaining hot, and by maintaining coolant from entering when the car warms up.

Sometimes as soon as a thermostat go bad, it continues to be stuck open. This allows the coolant to continuously go into the engine. Once this wake up it’ll feel prefer the warm is right working, or you may notice that it’ll job-related if the automobile isn’t moving, but if you get on the highway it stop working.

If your Malibu has actually a built in temperature gauge, take a look at it and also see if the is in the spot it is generally in after a little of driving. If that looks like it is colder than normal, that’s a pretty an excellent indication the there is other wrong with the thermostat.

Heater Core


The heater core itself deserve to go bad. Over time, lock are known to clog and fail. If you have a heater core that clogged, it’s no going to be able to pass coolant through. Without the heat coolant going v it, there can be no heat. A poor heater main point can also leak, therefore watch the end for that. Feel your passenger floorboard to watch if it’s wet.

Heater core’s are generally pretty affordable.

Hose to/from the Heater Core

There are two hoses comes to and also from the heater core. Castle both should feel heat or hot to the touch through the engine on. If among the hoses is hot, and the various other one is cold, that is a pretty great indication the the heater core is clogged. If the neither hose has any kind of heat, you may have actually air in the cooling system, short fluid, or low pressure.

Water Pump

If girlfriend look at her temperature gauge, and also the engine is running hotter than normal, yet there is not warmth coming indigenous the heater you might be having concerns with the water pump. Try taking the auto out that gear and revving the engine a little. If you feel the heat start to blow warm for a few seconds that’s an indication the a negative water pump or low coolant. Also, the serpentine belt going to the water pump going negative can it not revolve as fast as it demands to.

Here’s symptom of a poor water pump indigenous Autoblog.

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Conclusion: warm Not working Chevy Malibu

It have the right to be difficult to discover why your Malibu’s heater is blowing cold. But, using the information above around how and why a heater would fail deserve to make that a lot easier. If there is anything friend would choose to add, please feel free to leaving a comment below.