Skip the auto shop - Our mechanics make house calls

Q: Turned on back winow heater and engine made a noise ...when lights are turned on engine makes a noise like it can't take load ....

asked by on

Turned on back window heater to defrost and engine ade a noise like a motor bike was passing that when I start car it starts as normal but a vibration noise comes at the end of tge start ...that seems to be gone now .....if I turn on lights I get a noise from engine like it's not able for the load.....I have all heaters turned to low and them to off but hot very hot air coming from vents.....A/C has never worked properly it blows cold air out drivers side and warm out passengers so I don't really use it

My car has 117500 miles.
My car has a manual transmission.

A: Hi there. It appears you have more than one...

Hi there. It appears you have more than one problem with your vehicle. The noise coming from engine area with a load on the electrical system, may be a bad diode in the alternator. Continuing to drive the vehicle with a bad alternator diode, may leave you with a dead battery. The hot air coming from the vents sounds like blend door actuator(s) problems. I recommend the concerns your vehicle has, it be inspected by a certified technician like one from YourMechanic to pinpoint the noise and help you fix it accordingly.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: clicking noise off gas

I think you may be able to locate the source of this clicking noise if you open the hood and watch the engine while someone else gives it gas and then lets off. Something is moving and you may be...

Q: Replace timing belt.

Camshaft and Crankshaft position sensors are somewhat common failures seen in the Hyundai Santa Fe, mainly due to the temperature abuse they both receive inside of the engine. From extreme hot when the engine runs, to very cool ambient temperature...

Q: Checking new alternator.

You should have a mobile mechanic like one from YourMechanic come to you so you do not have to worry about getting stranded on the road with a dead system. Have the engine light on inspected. by the mechanic to...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.