Q: Heater does not blow hot air.

asked by on December 20, 2016

Hi Jason, wish you doing great. im in chiccago suburbs and its cold here:). My car AC is not blowing hot air from yesterday. not sure if its becoz it too cold. its 328 Xdrive 2011 model with 28 K miles on it. what should i do any suggestions?

My car has 28000 miles.
My car has an automatic transmission.

Heating AC Inspection $79.99 - $99.99 Get a Quote

Hi there. Check the coolant level in the radiator and make sure that its full. Check the heater core valve near the firewall in the engine compartment and see if valve is working. Feel the heater hoses before the valve and after the valve and see if the hoses have a different temperature. If the temperature is different, then the heater control valve is not working. If the temperature is the same, then there could be a blend door that is sticking open to the outside air. Look for any vacuum hoses that would be disconnected to make the blend doors not work. If your blend doors are electric, then check the wiring to the blend doors and make sure that they are not shorting to the ground. If you need further assistance with your heater not working, then seek out a professional, such as one from Your Mechanic, to help you.

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Truch rough idle in drive no vacuum leak

Hi David. Thanks for sending your question to us tonight. Unfortunately, when a vehicle in involved in an accident and multiple replacements have been completed, it's nearly impossible to determine the source of a vibration as you are describing without...

2008 Ford F-150 no reverse

You may have broke the reverse band inside the transmission and would require the transmission to be taken apart to replace the broke part.

fiat 500x revs but wont start, has hissing noise when when to start and a little afterwards. there is also a smell of freeze spray

Depending on the hissing sound you are referring to, this may suggest you have a bit of a vacuum leak, which may be preventing the motor from starting. High idle speeds or in some cases rough idle, stalling and hissing...

Fuses

These kinds of electrical system failures are most likely from different electrical connections throughout the system getting small amounts of corrosion in the connectors and will require each affected system connector to be disconnected and a small amount of dielectric...

Exhaust manifold

You may have broken bolts or studs in the engine head that would cause an exhaust leak. You may need to remove the manifold and extract the broken off bolts from the cylinder head by drilling them out and using...

Oil light and battery light came on. Car turned off

Stalling at idle could be due to a faulty mass airflow sensor, faulty camshaft or crankshaft position sensors, worn spark plugs, wires or defective ignition coil(s), inadequate fuel delivery or pressure (clogged fuel filter, injectors, faulty fuel pump or pump...

My civic shut off due too over heating, does it have a safely feature on it

Overheating the engine can damage the engine mechanically as well as electronics. If the engine does not crank at all, then in all likelihood, the engine has suffered mechanical damage. If it cranks but does not start, there can be...

Tranny fluid leaked out while driving.

Hi there. A transmission is a hydraulic system, which requires constant flow of fluid to operate the internal components inside. If you have transmission fluid that is leaking, you might want to first find out where the leak is coming...

Why does my tachometer not stay at zero?

Hi there. The tachometer on your 2007 BMW 328i is designed to measure the revolutions per minute (RPM) of the engine while it is in operation. Anytime the engine is running, the engine will idle (without the use of the...

Related articles

The Best Used Cars to Buy if You Live Close to the Ocean
If If you live close to the ocean, your vehicle is going to be far more vulnerable to rust than if you lived further inland. And the fact is, when it comes to resisting rust, not all vehicles are created...
A Buyer’s Guide to the 2011 Mazda RX-8
The The 2011 Mazda RX-8 is a sporty, two-door coupe that is able to seat four people (two in the front and two in the rear). While this was the final year of production for the RX-8, it definitely made...
How Do Heated Windows Work?
The The outside of your car’s windows are subject to harsh environmental elements including: Stone chips Road debris Dirt Bird droppings Snow and ice The benefits of heated windows While you can’t prevent environmental elements from occurring,...