Skip the auto shop - Our mechanics make house calls

Q: Only get heat when i rev up my car or push the gas. Other tham that i only get cold air coming out.

asked by on

I only get heat when im driving or i eev up the car. Itnwoll not get warm just sitting there. Then when i do get heat i only get it out of the driver side vents and its cold on the passenger side. I do not have dual controls. And i have had it flushed and coolant filled. When i got it flushed the heat worked better for a cpuple days then went right back to doing the same thing. I have gotten so many different answers from people i just dint know what for sure to fix.

My car has 175000 miles.
My car has an automatic transmission.

You may have a clogged heater core that may be prohibiting the outer linings of the heater core to get hot. As you know, the heater core is a series of tubes that the coolant runs through that generates the heat from the warm coolant after circulating through the motor. These tubes can occasionally develop a buildup on the inner walls such that when the heater core is "flushed" this buildup on the inner walls of the lines remains and still allows the coolant to flow through the heater core. It is important to note that when the heater core is "flushed" it is possible to get good flow through the heater core while the inside walls of the heater core remain caked with buildup. As a result, the buildup on the inner walls prevents the temperature from rising to its capability due to the insulating effect of this buildup on the inner walls which will prevent the necessary heat transfer to properly heat the inside of the car. I would recommend having an expert from YourMechanic come to your location to diagnose and replace your heater core.

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
  1. Home
  2. Questions
  3. Only get heat when i rev up my car or push the gas. Other tham that i only get cold air coming out.

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: Car overheats, heater malfunction

I'm not real clear yet on what is going on with your Mazda. Let's start with the diagnosdtic trouble code (DTC) that indicated a faulty Engine Coolant Temperature sensor. That needs to be replaced. Next thing: you may want to...

Q: Key getting stuck in ignition of a 2004 Chrysler Pacifica

The shift linkage can have problems that the vehicle is not getting all the way into park so the ignition can not be turned all the way off. The shift cable bushings are known to fail and may need to...

Q: gas gauge works but always reads as if it where full even if no gas is in the car

The fuel sender inside the tank is most likely open circuit or short circuit and needs to be replaced inside the tank on the pump.

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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.