Skip the auto shop - Our mechanics make house calls

Q: Not getting heat when idling

asked by on

I felt the 2 hoses coming from the heater core and one is hot the other isn't it's cold out and I need to flush it out but the hoses are in back of the engine about 6-10 inches down so I cannot figure it a way how to flush the system if I cannot acces the hoses please need help asap

My car has 131017 miles.
My car has an automatic transmission.

Of course the system has too be coming up to operating temperature in order to get good heat. If it isn’t, you will need to replace the thermostat. But if the thermostat is good and the engine is coming up to temperature, you may just have some air pockets in your cooling system or the system may be low on coolant. Flushing the system may be the answer, and you should be able to do it without taking those hoses off.. Here is a link for an article on flushing the cooling system Be sure to take extra time when bleeding and topping off the system to be sure all the air is out. Of course there are a few other possibilities, like a fault in the heater valve or the heating control system. But I’m betting you’ll be able to solve it with a good flush and bleed. If you’d like to get someone else to look at this you can contact Your Mechanic to have a technician come to your home or office to check out your heater and tell you what you need to do.

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!

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: Liftgate opens then bounces up and down then closes back. What causes this?

The rear door has built in sensors and power motors that work together to close the door automatically when you push the close button. If there is a shorted button then this could cause it to close again as soon...

Q: Broken heater

If everything in the cooling system has been eliminated as a cause - coolant level, flow, thermostat operating properly, etc., the issue may lie with the heater controls inside the vehicle. Within the "heater box" under the dash is located...

Q: Transmission stuck in park

As part of the normal operation of the shifter assembly in most vehicles, pressing the brake pedal down is required. It is possible that your shift lock actuator may have failed, causing your shifter not to move from the park...

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...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...