Skip the auto shop - Our mechanics make house calls

Q: Vehicle at running temp, turn on heat, no heat - stomp on gas, there is heat - ??? 2004 Jeep Liberty

asked by on

When I turn my Jeep on and let it get to normal running temperature I turn on the heat it blows cold air I stomp on the gas there's Heat let off the gas it goes back to cold air what could be the problem

My car has 104000 miles.
My car has an automatic transmission.

Hello - regarding your lack of heater function unless the engine is revved up a bit, you have a coolant flow issue. This could be caused by a worn water pump (engine might be running warmer than normal?), a partially blocked heater control valve (adjustment problem or failed heater control switch), or clogged cooling system that simply has poor flow. I would recommend an inspection of the heater & cooling system by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, 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!
  • Home
  • Questions
  • Vehicle at running temp, turn on heat, no heat - stomp on gas, there is heat - ??? 2004 Jeep Liberty

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: battery not charging light came on

I would still recommend getting the alternator and battery tested. The most likely cause would be the alternator. The alternator can have an intermittent failure that causes it to charge and not charge randomly. If this turns out to be...

Q: I'm putting a 2004 3.7 engine into a 2002 jeep liberty and I understand that I have to change the reluctor ring but is it 16 or 12

The two engines you cite use completely different computers (PCM/ECM) and the casting numbers are completely different. You can try it but you are all but guaranteed to have start up and operational problems due to incompatibility with the existing...

Q: My JEEP GC is coolant temp is high and I changed the themorstat

Hello, thank you for writing in. While that is a little higher than we would like to see, it is not overwhelmingly hot for the engine. Once it hits 260, you must cut off power to the vehicle. Anything over...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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.