Q: I changed my antifreeze yesterday, while sitting at an idle in my 1995 Nissan Altima, i have heat. But driving down the road I hav

asked by on

I have heat at an idle but no heat while driving

My car has 130000 miles.
My car has a manual transmission.

Hi there. From the description you have provided and assuming this was not a problem, prior to changing the antifreeze leads me to believe, there is air trapped inside the heater core. Sometimes, the air will purge on its own, and all you have to do is add more antifreeze to the radiator with engine cold. Sometimes, it is necessary to purge the air. This requires experience to purge the air. If, this was a problem before the antifreeze change. It could be, a faulty (stuck open) engine thermostat. I recommend your vehicle’s no heat while driving be diagnosed and repaired by a certified technician from YourMechanic.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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
  1. Home
  2. Questions
  3. I changed my antifreeze yesterday, while sitting at an idle in my 1995 Nissan Altima, i have heat. But driving down the road I hav

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: Heating

Hello. There can be several components that will cause the heater to fail. Always start with the simple options first. The heater relies on hot coolant from the engine entering the heater core where air is pushed over it before...

Q: Lots of rust on a newish car, what happened?

Unfortunately, there is no stop to rust. It happens to all cars that are regularly exposed to the elements, but some parts of the country are worse than others. But don’t worry, Nissan is aware of the issue and has...

Q: How do I use the sun visors?

The sun visors are located above the two front seats, and help keep sun and glare out of your eyes. To use the sun visors, manually fold them down until they are blocking the glare. If the glare is entering...

Related articles

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
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.