Skip the auto shop - Our mechanics make house calls

Q: Heater not blowing hot air

asked by on

The heater in my truck is not blowing hot air. I also noticed liquid leaking below the passenger's side dash.

If you have fluid leaking from under the dash on the passenger side, the heater core is leaking. This part will require replacement in order to get heat to function properly again. Sometimes this can be replaced by removing only the glovebox. Other times the dash will need to be completely removed to access the heater core. With this taken into consideration, I would recommend that you have this job done by a professional in order to make sure everything gets put back together correctly. Once the heater core has been replaced, I would recommend flushing the cooling system, installing a new radiator cap, and bleeding any air from the system if necessary to ensure proper function of the heater and cooling 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 blowing hot air

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: Electrical system issues

You may be having wiring harness issues that would have to be isolated and traced for each problem you are having. The door locks could be a wiring or a lock actuator issue. These are probably random unrelated issues that...

Q: Fuel Injector Replacement, BMW 1988 BMW 325i

Yes, on this model BMW you can replace one injector individually relatively inexpensively. If you are able to afford it and are fairly certain it is an injector problem, I would suggest replacing them all at the same time while...

Q: Truck not starting consistently

Hello. First, I am assuming your vehicle has an issue with the starter. Voltage drop testing should be performed between the starter and the battery. This will tell you if the is a loss of contact between the battery and...

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...
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...
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...