Skip the auto shop - Our mechanics make house calls

Q: Heater not always blowing heat

asked by on

Just curious what is wrong with my vehicle when last night my car was running and my heater was working ok and then it stopped blowing and then started again. Today it happened again. What could it be and rough estimate of cost?

My car has 16500 miles.
My car has an automatic transmission.

This may be related to a faulty blower motor or blower motor relay. Occasionally, the blower motor itself will wear out or become faulty working intermittently as the brush contacts inside the motor wear out. The blower motor relay supplies power to this motor when you turn the switch to "on" that can sometimes fail. When this happens, you may notice that you will not feel anything blowing out of the vents at all. I would suggest having an expert from YourMechanic come to your location to diagnose your vehicle’s blower motor system.

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 not always blowing heat

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: I have a 1994 Oldsmobile 88 the auto lock key keeps randomly locking the start and all power to start my car !

If your auto lock is a factory device, it might just need a new battery for the remote. If yours is an aftermarket device installed by an accessory shop, it could be the same, or there might be a host...

Q: My Ford Windstar stalls at low speeds.

At lower speeds the throttle plate is closer to being closed and the idle air control valve can be used to make small adjustments to air flow. If the idle air control valve is clogged with carbon or there is...

Q: My blower motor and interior lights quit working. How do I fix it?

Hello - first thing to check would be blown fuses. These 2 components are on separate circuits. The blower motor also has a relay which should be checked. If the fan works on the High/Max position, but not other speeds,...

Related articles

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...