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

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
  1. Home
  2. Questions
  3. Defroster works - hot or cold air depending on what temperature you have it on, but not vent or heat. 2011 Ford Edge

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 fan wont work

I recommend you request an electrical diagnostic on the blower motor circuit. It has to be determined if 12 volts is being delivered to the blower motor when the blower motor switch is on, in any or all switch positions....

Q: Rattle in exhaust then a puff of smoke

Hi, thanks for writing in. I would assume that the vehicle is still under the factory warranty. It would probably be best to take it to the dealership to have it looked at under warranty. It sounds like there may...

Q: 2007 Ford Edge I don't no which one is the blower motor relay

Hey there. There is a 40 amp fuse and a separate relay in the engine compartment fuse box. If the problem persists after installation, or you need help having this installed, an expert technician from YourMechanic can come to your...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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.