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!
  1. Home
  2. Questions
  3. Heater making loud rumbling noise when on high 1996 Saturn SL2

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 not working

Your vehicle has a control valve in the heater hoses the either blocks or allows the hot coolant to flow into the heating system. This control valve is operated by engine vacuum via several solenoids that are controlled by the...

Q: Won't stay started.

Hi, thanks for writing in. This sounds like you may have a problem relating to the electrical draw of the instrument cluster or potentially a short somewhere causing this excess draw of power. When one component in the electrical system...

Q: Suggested maintenance before pulling a uhaul trailer 2006 Saturn Vue

Hi there. Besides having a complete j spection do e of the vehicle to identify any wear or leaks there is not much else you need to do. I would definitely make sure that the brakes are great and if...

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...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...