fairly significant
Typical Repair Cost:
Average Mileage:
94,316 miles
Total Complaints:
12 complaints

Most Common Solutions:

  1. not sure (7 reports)
  2. replace heater switch in dash (2 reports)
  3. replace heater flap arm (1 reports)
  4. replaced cracked heater knob (1 reports)
  5. replaced heater switch in dash and heat/cool motor (1 reports)
1999 Ford F-150 AC / heater problems

AC / heater problem

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1999 Ford F-150 Owner Comments

problem #12

Mar 242012

F-150 XL 4.2L V6

  • Manual transmission
  • 70,000 miles


I think Ford Motor Co has fallen, and failed its customer base, they are just slapping their vehicles together as fast as they can, just to make a profit. Ford Motor Co. need to remember they need to have repeat customers to stay in business and I'm not talking about thier repair shops, I'm talking about people buying new vehicles. I thought thier motto was "JOB NUMBER ONE", I just don't see it anymore.

- , Lancaster, PA, USA

problem #11

Nov 012008

F-150 XLT 5.4L

  • Automatic transmission
  • 120,000 miles

Only heater issue I had so far was the dang heater knob was broke. Pulled it off and it was split in back. I had to go through a bunch and never found one without a crack till a friend totaled his F150 and gave me both of his.

Replaced knob and works fine now.

Once in a great while it smells like antifreeze in the truck but i'm not messing with it until I notice a loss of fluid or a wet spot.

- , Dunkirk, IN, USA

problem #10

Nov 192008

F-150 XLT 4.2L

  • Automatic transmission
  • 96,795 miles

It is a very common problem according to many sites that I have found. I think that Ford should have a recall on this. It is estimated to take eight hours repair time at the dealer...this SUCKS!

- , Chrleston, SC, USA

problem #9

Dec 122008

F-150 XL 4.2L

  • Automatic transmission
  • 84,000 miles


fan switch only works on high speed fan.air works fine no heat.

- , Pompano Beach, FL, USA

problem #8

Oct 082008

F-150 XLT 4.2L V6

  • Automatic transmission
  • 129,000 miles

I�m having the same issue now. AC works fine but no heat!!

- , Little Elm, TX, USA

problem #7

Oct 102006

(reported on)

F-150 XLS V8

  • Automatic transmission
  • 55,000 miles

They replaced the dash heater switch under warranty (I replaced in November of 2005) - but it also needed the heat/cool motor for $80.00 and $12 labor. It mixes the cold and hot air. Working fine now.

- , Hyde Park, VT, USA

problem #6

Jan 212007

(reported on)

F-150 4.2L

  • Manual transmission
  • 79,000 miles


The A/C works fine but the heater blows cold air. I live in Houston so I only found out when this winter though it did work last year. I suspect it is the flapper that closes the outside air or directs the air over the heater coils. I am having trouble finding it as it is congested under the dash. I may have to get the Chilton repair manual, so this may take a few months to repair.

Update from Feb 4, 2011: I fixed this problem, the hot/cold knob on the dash was broken and not turning the thermostat control. I glued it temporary and had to lubricate the control inside the dash to turn as it had gotten gumed up and stuck. Thanks for all the help. By pulling it straight out you can look at the platic knob and see it it is broken.

- , Houston, TX, USA

problem #5

Jan 202007

(reported on)

F-150 XLT 4.6

  • Manual transmission
  • 133,000 miles

Just need help getting some hot air to blow

- , Powell, TN, USA

problem #4

Jan 132007

(reported on)


  • Automatic transmission
  • 100,000 miles

Well I pulled out the heater switch or regulator it moves a flap from outside air to engine compartment well the flap has a plastic piece that goes over the regulator the sleeve itself had dry rotted and shattered in many pieces you will only discover this if you take the motor regulator out from under the dash not an easy job since all manuals say you need to take out entire dash to do it. They are right if you need to replace this flap but to discover it no need to. Just go slow and be flexible... I am still looking for a replacement arm to fix this with no luck.... ken

- , Pensacola, FL, US

problem #3

Oct 282006

(reported on)

F-150 XLT

  • Automatic transmission
  • 163,000 miles

The A/C works fine; just no heat when I turn the switch on the dashboard. Took it to the Ford dealer who insisted it was a bad heater core. I authorized him to replace it. Guess what? It didn't fix the problem! I thought it would be a bad switch or some sort of mixing valve problem. The dealer really took me for a ride by using a hit-or miss approach to problem solving. Dealer could not find problem. Mountain View Ford, Chattanooga, TN..... don't even think of getting your Ford fixed there.

- , Hixson, TN, USA

problem #2

Oct 012006

(reported on)

F-150 XLS V8

  • Automatic transmission
  • 54,000 miles

This is the second time in under a year that this switch has gone bad. Not sure if it is a fluke or what.

- , Hyde Park, VT, USA

problem #1

Feb 042006

(reported on)

F-150 XLS V8

  • Automatic transmission
  • 48,000 miles

fan worked but just blew cold air. Remote control behind temperature dashboard switch no longer working. Don't know why it would fail now. Had to wait till the winter!

- , Hyde Park, VT, USA

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