Q: The heater doesnt come on in my car sometimes.

asked by on January 12, 2017

When I drive the car sometimes the heater doesn't come on.Also my thermostat in the car goes up but doesnt over heat.

My car has 188870 miles.
My car has an automatic transmission.

Thermostat Replacement $141.88 - $639.09 Get a Quote

Hello, The thermostat regulates the flow of the coolant in your car’s engine and controls when the coolant flows in and out of the motor from the radiator by opening and closing at specific temperatures. When your thermostat is not working properly or is stuck closed, this will not allow the coolant to properly circulate through the engine, which may cause the engine temperature to fluctuate erratically or in some cases just remain hot. When the thermostat is stuck open it can cause the coolant to circulate constantly resulting in the motor never reaching the correct operating temperature. This will also impact the flow of coolant into the heater core which provides the warm air that is blown into the cab of your car. I would suggest having a professional from YourMechanic come to your location to diagnose and inspect your vehicle.

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

Brake lights work but no tail lights. Half of my dash cluster lights up no gauges... Please help

Hi there. It sounds like you have a series of electrical issues going on here. From my experience, with this vehicle, the combination switch needs to be tested first. Most of the time, the switch shorts out internally and this...

Engine grinds something in the cold

Any abnormal noise coming from a car always gives me an uneasy feeling, so I can understand the concern here. In fact, this is an issue I am quite familiar with. Our first step would begin with checking the level...

Transmission slipping.

There are a multitude of reasons why and automatic transmission will slip. It is possible that a bad speed sensor could cause the transmission to slip. However, it is also possible that a slipping transmission can cause sensor codes to...

What safety tips should I follow when performing vehicle maintenance?

You can perform many different maintenance tasks on your car yourself, but it’s important that you ensure you’re safe while doing so. Here are some of the most important tips to follow at all times, whether you’re changing the oil...

Electric problems

For an issue like this you are going to have the vehicle scanned to see if there is still something disconnected or if there are any codes that need to be cleared. You may have damaged the control module by...

Brake pads making funny noise.

You may have more than one problem on your car. Your funny noise may be the axle or bearing. the vibration on acceleration is in the axle or bearings. The vibrate when braking may be in the brake rotors. I...

How do you delete a speed dial entry in the HandsFreeLink system on?

Speed dial entries in the HandsFreeLink® (HFL) system provide you with a faster way to make voice calls in the car. You’re limited to just 15, though. Deleting entries that you don’t use lets you add numbers that you do...

What if the VSA turns on during startup and doesn't turn off and what I do is I turn off the engine and start again. This time aro

Hi there. If the VSA light is coming on and shutting off but does not come back on until the next start, then this is a normal condition as the light is telling the drive that the VSA system is...

I overfilled my engine with engine oil

If you overfilled the engine oil you may have got oil into the tops of the pistons and fouled the spark plugs. Once you adjusted oil level and start the car again it will blow smoke for a while until...

Related articles

Top 10 PZEV Cars for Eco-Friendly Drivers
Teddy Leung / Shutterstock.com The whole idea of a PZEV (that is, a partial zero-emissions vehicle), seems paradoxical. You’d think it’d have to either be zero-emissions or not in the category at all. But as contradictory as...
The Top 5 Selling Cars in Alabama in 2012
2012 2012 was a great year in Alabama for auto manufacturing, but that wasn’t the only bright spot. Vehicle sales in Alabama were also robust in 2012. Nothing much changed in terms of the vehicle types that were most popular...
The Top 5 Selling Cars in Florida in 2012
Florida Florida offers great weather year round, and the fact that snow and ice never factor into the equation means drivers don’t have to focus on the overall vehicle handling as they do in other states. The best selling cars...