Q: I smell antifreeze.

asked by on January 13, 2016

I wonder if my heater core needs replacing. I keep smelling antifreeze.

If you smell antifreeze inside of your truck then it may indeed be the heater core. Most of the time the passenger side floor will also get wet from antifreeze if there is a leak in the core. A leak under the hood can also cause the smell to enter the cab so you should start with a cooling system pressure test to see if you can locate the leak. A pressure tester is a speciality tool that allows a mechanic to pump up the system to help identify any leaks. For something like this you should enlist the help of a certified mechanic, like one from YourMechanic, that can easily perform this task.

Was this answer helpful?
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

Loose headlight clip

A loose clip can allow moisture inside the connection and cause a headlight bulb to stop working, such as what you are experiencing with your Mazda 3. It is also possible that the clip came loose on its own due...

Tail lights and dash light don't work on a '94 Chevy 1500

It really depends on where you live and what the going rate is. I'm in a big city here at Houston and the dealer's charge around $120-140 per hour of labor. That might help you get an idea if you...

How do you adjust the vents?

Adjusting the air vents in your car lets you fix the flow of hot, cold or fresh air where you want it most. It’s also very simple. Here’s how: Front Right and Left: Move the vent slide left or...

Related articles

How to Replace an AC Evaporator Sensor
The air conditioning pressure evaporator sensor monitors and adapts to the evaporator's temperature, preventing damage and keeping the AC working.
What Components of the Heating and AC System Are Most Likely to Fail?
The The average automotive heating and cooling system (HVAC) is actually very complex, and they’re not connected to one another outside the cabin. Yes, your HVAC controls allow you to switch from warm air to cold, adjust the fan speed...
What Typically Causes the Heating or AC to Stop Working?
While both the heating and AC are connected - to an extent - within your car, they’re actually...