Which parts fail
Components named in complaints (air conditioning, heater, defroster, HVAC controls).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2011 Ford F-150 owners, lightly cleaned up (personal details are redacted by NHTSA).
Tl* the contact owns a 2011 Ford f-150. The contact stated that the rear window defogger overheated and caused the wires and rear seat rubber frame to burn. The contact noticed smoke coming from the rear door and once opened, causing the rear window to shatter. The fire department was called but a report was not filed. The vehicle was taken to the dealer where the technician diagnosed that the rear window defogger system needed to be replaced. No repairs were made to the vehicle and the manufacturer was made aware of the failure. The failure mileage was 68,700.
Tl* the contact owns a 2011 Ford f-150. After the rear window defroster was activated, the passenger side of the rear window shattered. The contact noticed that the casing of the heating element and the shattered area of the window contained burn marks. The vehicle was not diagnosed or repaired. The manufacturer was not notified. The VIN was unknown. The approximate failure mileage was 80,000.
A week or two before the incident I noticed that the light on the rear defrost button no longer turned on when the rear defrost button was pressed. I wasn't sure if the rear defrost was working or not. On the morning of the incident it was cool outside and the windows were frosty. I pressed the rear defrost button after starting the truck and it once again did not light up. I started driving to work with my two kids in the back seat. After driving a couple miles I heard a loud noise as if something had hit the truck. I looked in all the mirrors to find what had hit the truck and noticed that the passenger side of the rear window had shattered. It hadn't fallen out of the frame, but was spider-webbed throughout. When I took the truck to the dealer the service manager said he had seen 5 other 2010-2011 f-150's just this winter with the exact same issue. …
Tl* the contact owns a 2011 Ford f-150. The contact stated that the driver's side rear window shattered when the rear window defogger was turned on. The defogger light went off. The contact called the frederick motor company [phone], 1 waverley dr., frederick, md, 21702) and the technician referred the contact to an independent auto glass shop. However, the independent mechanic stated that the failure was a known issue and referred the contact back to the dealer. The vehicle was taken back to the dealer but no diagnosis or repairs were completed. The manufacturer was made aware of the failure but offered no further assistance, stating that the failure was not covered by the warranty. The failure mileage was approximately 73,000.
Tl* the contact owns a 2011 Ford f-150. After turning on the rear window defroster, a loud banging sound was heard. The following day, the contact discovered that the rear window had shattered. The contact indicated that the failure occurred a day after freezing rain was present in the area. The failure was not diagnosed or repaired. The local dealer (wehr Ford in marshfield, mo) was notified of the failure. The manufacturer was not notified. There were no injuries, but the contact was concerned of the risk of an injury due to the shattered glass. The VIN was not available. The failure mileage was 90,000.
Tl* the contact owns a 2011 Ford f-150. When the vehicle was started, the rear window defogger button was pushed and the indicator illuminated and then turned off. The contact pressed the button again. On the third time the button was pressed, the contact heard a loud bang and the rear window shattered. The dealer (dean arbour Ford, 3382 m-55, west branch, mi 48661) was contacted by phone and the contact was awaiting their decision. The vehicle was not repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 100,000.
We started having issues with the rear defroster not working on the power sliding rear window. After a short period of time after pushing button to power the rear defrost smoke was noticeable coming from the lower part of the rear window on the passenger side of the cab. I then pushed the rear defrost button to turn off the power looked back into the rear view mirror to see if the smoke would stop and saw the window fracture as I was looking at it.
Tl* the contact owns a 2011 Ford f-150. The contact stated that the rear defroster failed to work properly. The failure caused the rear window to fog, which diminished the contact's visibility. The failure recurred multiple times. The vehicle was not diagnosed or repaired. The manufacturer stated that there were no recalls on the vehicle. The approximate failure mileage was 30,625.
Tl* the contact owns a 2011 Ford f-150. The contact stated that the rear defroster was activated and the rear window shattered. The vehicle was repaired by an independent mechanic. The manufacturer was notified of the failure and informed the contact to notify the insurance company. The dealer was not contacted. The failure mileage was approximately 94,200.
Tl* the contact owns a 2011 Ford f-150. While driving 65 MPH, the rear windshield of the vehicle shattered. The vehicle was taken to the dealer where it was diagnosed that the rear defroster May have shorted out, causing the glass to shatter. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was 81,600.
AC & Heater complaints in other F-150 years
Frequently asked questions
How common are ac & heater problems on the 2011 Ford F-150?
NHTSA has 23 complaints about the a/c & heater of the 2011 Ford F-150, 1% of the model year's 2,193 complaints. The component named most often is defroster/defogger/hvac system › rear window (15 mentions).
Is there a recall for 2011 Ford F-150 ac & heater problems?
No. NHTSA lists no a/c & heater recall for the 2011 Ford F-150, though it has 6 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2011 Ford F-150 ac & heater problems start?
Half of the complaints with a recorded mileage happened before about 66,000 miles, and 9% before 25,000 miles.
Is it dangerous?
Owners linked 0 crashes, 3 fires and 0 injuries to a/c & heater problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.