Q: Hot air blows even though the heater is not on. I have a 2007 Jeep Commander

asked by on

Hot air blows even though the heater is not on.

My car has 178000 miles.
My car has an automatic transmission.

Your car has a heater control valve to control the flow of coolant through the heater core. It is controlled via engine vacuum so that in the case of a failure, it will default to the heat (open) position. Your problem might be a simple as a vacuum hose that is broken or disconnected. Look under the hood for any small hoses that might be broken or in bad condition. If you don’t find anything that way, contact YourMechanic to have a technician come to your home or office, they can check out and replace your heater control valve for you right there on the spot.

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
  1. Home
  2. Questions
  3. Hot air blows even though the heater is not on. I have a 2007 Jeep Commander

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: Heater only works on high. Heat is not hot.

If your heater only blows when the setting is on high, this may suggest that you have a faulty blower motor resistor. The highest speed setting may still work because in most cars in the highest fan speed settings the...

Q: Misfire on cylinders 3 & 4 need to know the easiest way to fix it

The best way to resolve misfires on your engine is to remove the ignition coil and the spark plugs on the affected cylinders. If the spark plugs appear to be in bad condition I would recommend replacing the spark plugs....

Q: 1973 Jeep CJ-5 304 V-8. Vehicle starts right away but dies as soon as the key is released to "run" position.

Hi there. I would assume that your problem is related to the ignition cylinder on the dash. It's possible that either the ignition is damaged, or perhaps a ground wire behind the dash is loose. You should be able to...

Related articles

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 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...
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.