Skip the auto shop - Our mechanics make house calls

Q: Temperature gauge says overheating, engine feels only warm. Heater not blowing hot air.

asked by on

Hi Everyone! My 2006 Acura TSX has been having overheating issues. It was running fine until one day it started over heating. I pulled over immediately and saw it was steaming and turned the car off. I saw the radiator was cracked. I replaced the thermostat, radiator, coolant temperature sensor (on radiator), flushed out the radiator. Now the car says its overheating on the dasboard and I go to check the engine - no steam, engine is luke warm at best, sometimes both radiator hoses are hot, other times the top hose is hot and bottom is just warm. The car intermittently will blow heat and then just cold air. When car is supposedly overheating, the radiator fans never kick on (only when running A/C). I'm thinking I have a clog somewhere or water pump is going. There are no drips or evidence or leakage when driving or idling even when it says its overheating. Any ideas? This is driving me nuts!

My car has 130000 miles.
My car has an automatic transmission.

Hi there. From the description you have provided, your vehicle overheating may be a combination of problems. The cooling system work you performed, replacing the radiator, the thermostat, the radiator fan switch and flushing the cooling system, should of taken care of your vehicle’s overheating. It could be, a faulty water pump impeller. From the symptoms you have described. It could be, air trapped in the cooling system. Purging the air can be tricky, sometimes. There is a bleeder screw that helps purge the air. Start the vehicle, with radiator cap removed, heater turned on, open bleeder screw and close when antifreeze come out.

Allow thermostat to open, it may percolate a bit before it opens, once the thermostat opens, accelerate the RPM a few times, check heater hoses for heat on both sides. You should see flow in the top of the radiator if, water pump is working and thermostat is open. Bring up RPM, add antifreeze, and reinstall radiator cap, let engine return to idle. Squeeze the upper hose, if pressure exists, the system is full. It could be, the engine temperature sensor or temperature gauge is faulty. I recommend having you vehicle’s engine overheating be diagnosed and repaired by a certified technician, such as one from YourMechanic.

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
  • Temperature gauge says overheating, engine feels only warm. 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: Nothing seems wrong and the motor is burning oil

The oil consumption on most engines is supposed to be less than 1 quart per 1,000 miles. You state you are using 3 quarts every 2,000 miles. The first thing would be to have an oil consumption test that would...

Q: What would cause all of these electrical problems?

It is difficult to say what is going on with your Vue without being there. This will likely have one problem that is causing all these issues. The removal of the BCM has probably made this more difficult to diagnose...

Q: my battery light stays on

You need to check to make sure the large power wire to the alternator is getting power. If it is not then you may have to check the wire from alternator to the battery fuse box for burned out wires...

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 to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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.