Q: Defroster works - hot or cold air depending on what temperature you have it on, but not vent or heat. 2011 Ford Edge

asked by on March 15, 2017

Ok...when you turn the defroster on it will work and blow out hot or cold depending on the temperature you have it set on. However, when you turn the defroster off and just try to let it vent into the car it works some of the time. It was making a weird noise and stopped blowing air out. I tried it again the next day and it worked. This has been happening off and on the past few days. When it's not working, I heat the car with the defroster on. Is the blower fan or something fixing to go out? I'm pretty sure the ac still works, as in gets cold, it just doesn't won't to blow out all the time just like the heat. The blower fan when it was making noise sounded sick, you could tell it was fixing to go out. Why would it be working now?

My car has 122720 miles.
My car has an automatic transmission.

Hello - your symptoms suggest that the HVAC blower motor resistor has failed. The blower motor resistor limits fan motor speed for the Low and Medium settings, but is not involved at the Max setting. Since defrost on most cars uses the Max fan setting, the blower would work for Defrost but not for Heat or Vent. I recommend a fan not working inspection performed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, confirm this diagnosis, and give you an accurate assessment of damage and cost estimate for repairs.

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

Service Engine Soon Light came on yesterday.

While the oxygen sensor may be the cause of the service engine soon light coming on, it's best to have a certified technician correctly diagnose why the service engine light is on. When the service engine soon - or check...

How to adjust the volume on the radio?

When listening to the radio, you may find the need to turn the volume up or down. There is a Volume knob built into the radio to help you adjust the volume at any time. To adjust the volume. ...

Service Wrench light on Ford Edge 2007 what we need to do?

Hello. The wrench means that your vehicle needs service. This can be as simple as needing an oil change. The system will need to be scanned for codes to be able to tell for sure what is going on. If...

Related articles

The Top 10 Most Problematic Cars
All cars have issues, from grinding brakes to gasket leaks. The Ford Explorer's and Honda Civic's bad transmissions rank them as the most problematic.
The Top 5 Selling Cars in Georgia in 2012
Georgia Georgia offers drivers a mild climate with very little snow, but rain is a major factor. Previous best-selling cars in the area, such as the Escape, Fusion and Camry, have shown that residents prefer a mix of both SUV...
The Best Used Cars to Buy If You're a General Contractor
If If you're a general contractor, you probably aren’t in the market for a used car. More likely, you’re looking for a pickup truck, because you need to haul equipment and supplies to various job sites. Most contractors will likely...