really awful
Typical Repair Cost:
No data
Average Mileage:
186,411 miles
Total Complaints:
1 complaints

Most Common Solutions:

  1. replace ac/heater control unit and replace solenoids (1 reports)
1999 Toyota 4Runner AC / heater problems

AC / heater problem

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1999 Toyota 4Runner Owner Comments

problem #1

Oct 072012

4Runner Limited 3.4L V6

  • Automatic transmission
  • 186,411 miles


The A/C Heater did not work right when I bought the truck with 300,000 on it and has been getting progressively worse. The heater is stuck on vent and cannot be put into defrost mode. In cold weather, you have to scrape the inside of the windshield with a credit card in order to see. The heat control doesn't work, I have to stand outside the vehicle and reach in from the passenger foot well area and reach way in under the dash and pull a lever to change it from cold to hot. The only solenoid that still works under the dash is the one that changes from fresh air to recirculation mode.

While driving down the road, most days the unit will switch itself back to recirculation mode which instantly fogs up all interior windows. I have to keep my eye on the display constantly and press the button to switch back to fresh air mode every time it changes itself. Sometimes I have to press the button 20 times before it will switch back to fresh air mode and by that time the windshield is completely fogged up and I can't see anything. I carry a little plastic curved scoop and hold it up to the vent while driving so that it redirects the hot air from the vent onto the windshield end defrosts/defogs a little section that's enough for me to see out of.

The fan sometimes will not come on either, so I have to drive around for about 45 minutes before it becomes warm enough to take off heavy winter gloves and jackets. Some days the fan constantly switches off and on and comes on at various speeds, with no ability to control it. I have nearly been in thousands of accidents with cars, pedestrians, wildlife, and ditches in the year that I drove the truck, only swerving around things at the last second when I see them through the tiny section I manage to keep un-fogged on the windshield. I now only use the truck in emergencies or if I have to take my other vehicles in to have service performed. I will never have it fixed because it would cost upwards of $1000 to replace the heater control unit and the dead solenoids under the dash. This is only one of hundreds of problems I've had with this truck, it is the worst vehicle I've ever owned and I am a hardcore Toyota truck lover and avid off-roader.

- , Athabasca, Alberta, canada

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