Skip the auto shop - Our mechanics make house calls

Q: Coolant flush

asked by on

My heat isnt working right in my car. The suggest fix was to flush the heater core. I also need to flush my radiator. If i flush the radiator, will it also flush the heater core in the process? Or will the water not end up there?

My car has 127000 miles.
My car has an automatic transmission.

A cooling system flush will extend to the heater core. Although no cabin heat can be caused by blocked cooling system passageways there are many "as likely" causes of the no heat condition. Consequently, the most efficient approach is to methodically diagnosis the problem and then only do those operations that are really necessary. That saves money, too. Other common causes of no cabin heat include stuck open engine cooling thermostat, malfunctioning blend door(s) (part of the in-dash ventilation network), a faulty or stuck heater control valve, collapsed hoses, trapped air and low coolant level. The cost to resolve the problem depends on which of the foregoing faults is the cause. If you desire a diagnostic to determine exactly why there is no cabin heat, please request a non functioning cabin heater diagnostic and the responding mechanic will come right to your location and get this resolved for you promptly. If you have further questions or concerns, do not hesitate to re-contact 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

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: Clutch lost all hydraulic pressure after difficulty engaging gears while using the clutch.

Hello. This situation is usually a failure of either the clutch master or slave cylinder - they simply wear out. If you have any clutch fluid on the drivers side front carpet, the failure is the clutch master cylinder. If...

Q: Heat is not blowing out of the vents, even when on high.

The lack of heat being generated by your system may indicate a clogged heater core. The [heater core]((https://www.yourmechanic.com/services/heater-is-not-working-inspection) is a small radiator like unit that circulates the hot coolant from the engine through the heater core which then uses this...

Q: Drained the wrong fluid

Hello! Believe it or not, that has been done several times before on Subarus. The transmission drain looks very similar to the oil drain, so they can easily be mistaken for one another. Usually, the transmission will just have to...

Related articles

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 Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...