Q: Car heater not working

asked by on February 18, 2016

The car heater is not working.

Heating AC Inspection $79.99 - $99.99 Get a Quote

When the engine reaches operating temperature, the thermostat opens, allowing hot coolant to flow through the heater core. The heater core then heats the air that is blown through it by the blower motor. This makes the interior nice and warm. There are many reasons for an inoperative heater, including a failed thermostat, failed heater core, low coolant level, and air in the cooling system. A common issue on vehicles like yours is air getting into the system via leaking radiator hoses. In this case, the leak must be fixed and the cooling system bled. I suggest you have a professional inspect your AC system firsthand, and diagnose and repair your vehicle. YourMechanic is an excellent option since we make house calls.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

What others are asking

Spark plugs 1 and 5 are black, car is giving a multiple random misfire code, car has sat for a while 7 months ,maybe bad gas

Engine misfires can be caused by many different problems and are generally caused by either a spark or fuel issue or in some cases, a combination of both. Spark related problems generally will result from things like ignition coils, crankshaft...

Brake fluid replaced, now car will not stop unless brake pedal is nearly to the floor.

One of the most common causes of the brake pedal going to the floor is a loss of brake fluid. Generally, this is easy to detect due to the fact that there is usually brake fluid leaking on the ground...

My car wont go above 40 mph,has a burning smell,and has a noise?

Hi There, What you are describing sounds like you may have a clogged catalytic converter. The catalytic converter converts toxic exhaust gases into less harmful pollutants that are suitable to be expelled into the atmosphere. When the catalytic converter is...

Loss in boost pressure.

Check the wastegate on the turbo and see if its causing the turbo to drop off the pressure. The tube from the turbo to the wastegate could be leaking and causing the pressure to be lost. If you need further...

Error code P2442

Hi. The code P2422 is an "EVAP canister vent shut valve close malfunction" code and is a manufacturer code that needs a little diagnosing before it can be replaced. If you need further assistance, I recommend you have a mechanic,...

Engine is getting warm, heater is only blowing warm air when the vehicle is moving. 2003 Jeep Grand Cherokee

Hi there - this sounds like a possible thermostat (no allowing proper warm-up to operating temperature), or an inadequate water flow (water pump or clogged radiator) problem. The lack of heater function could have 5 causes: the engine is not...

I have a 2009 chevy Aveo, and my temperature gauge is below the cold line. It my heat is blowing out semi warm.

The lack of heat being generated by your system may indicate a clogged heater core. The [heater core]((https://www.yourmechanic.com/services/heater-is-not-working-inspection) is a small radiator like unit that circulates the hot coolant from the engine through the heater core which then uses this...

A rattle sound underneath truck when starting or when driving and speeding up

Hey there. This could be a variety of things as most cars tend to vibrate a bit which will cause bolts to loosen or fall out over time. Especially depending on a person's individual driving habits and conditions. There may...

if the o2 sensor needs to be replaced. should you replace them all if none have ever been replaced at 114000 miles

Normally, if there is a question as to whether the sensors need to be replaced, checking the datastream with a diagnostic scanner will show how well the oxygen sensor is performing. A couple of things to note about oxygen sensors...

Related articles

A Buyer’s Guide to the 2012 Infiniti M
The The 2012 Infiniti M combines luxury, performance and value into a stylish sedan. With numerous standard luxury features and drive-enhancing technology, this is one car that is sure to impress any driver in a number of ways. Key Features...
How To Keep Your Car From Overheating
Monitoring your coolant level, turning the A/C off in very hot weather, and regular inspections will help you avoid having an overheating car.
A Buyer’s Guide to the 2012 Infiniti EX
If If you’re in search of sport meets practicality, the EX may just be your perfect match. With the sedan-like driving of its G37 sibling combined with utility functionality and plenty of power under the hood, this is one SUV...