Q: Over heating and heater blowing cold

asked by on

My truck all of a sudden started blowing cold air from heater and over heating.. I've already changed thermostat twice.

My car has 113000 miles.
My car has a manual transmission.

Hi there:

It’s more than likely that you have either an obstruction inside your heater core or a restriction of coolant that is not allowing the entire cooling system to work correctly. The heater core receives hot coolant from the motor to heat up the heater coils. When the heater does not work, and the vehicle overheats; this is typically the issue. You should have a professional mechanic complete a car is overheating inspection.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Over heating and heater blowing cold

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: Vacume leak

Engine speed should not change when you apply the brakes. Disconnect the vacuum line to the brake booster and plug the connection to the intake manifold. Step on the brake pedal with the engine running. If engine speed does not...

Q: Loud turns after driving awhile

If the whining noise is occurring as you turn the steering wheel, it could be the power steering pump failing and/or the drive belt on the pump is loose, worn, or glazed. Such noises are never "normal" and are not...

Q: Q: Blown head gasket

Hi There, What you are describing sounds like the signs of a blown head gasket. White smoke or condensation coming from the exhaust generally indicates that you may have an internal engine problem, such as a head gasket leaking coolant...

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 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...
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.