Skip the auto shop - Our mechanics make house calls

Q: Heater making loud rumbling noise when on high 1996 Saturn SL2

asked by on

Recently had my blower motor and resistor replaced by my usual mechanic I make appointments with on this site. Recently I've started hearing a kind of loud rumbling or growling noise while the heat is on high while inside the car, the noise goes away when I turn the heat down to a lower blower setting. This doesn't appear to be affecting the engine in anyway but noise only seems to happen when the heat is on high. Any help as to a possible diagnosis?

Thanks

My car has 132000 miles.
My car has an automatic transmission.

Hi there - I believe the heater fan motor bearings are shot, and that’s the noise you hear - increasing noise level as fan speed goes up. These bearings are generally not serviceable, and the fan motor should be replaced. I recommend a fan blower motor replacement performed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, and give you an accurate assessment of damage and cost estimate for repairs.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: Heater is blowing cold air when sitting at idle.

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...

Q: My truck will not open anymore at all and then I put the key it won't twist ether?

It could be that you have a lock actuator that is jammed. The actuators can operate the locks, but are also moved by the key in the lock. when they become jammed everything just stops working. There isn't much that...

Q: Car overheats

Overheating can be caused by something as simple as low coolant level, or something as major as a blown head gasket, or a crack in the cylinder head or block. The cooling system should never be checked if the engine...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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.