This is my first post on this forum so be easy on me. I'm posting because we have in issue with our 2005 4Runner's heat. This is our hand me down work vehicle which has the V-8 with all the bells and whistles & 185K on the clock. It's been a great vehicle so far and the engine runs just as smooth and powerful as the day it came off the line. It has the dual zone digital climate control which we have an issue with the heat being on full hot all the time. It doesn't matter if the digital temp is set at 65 or 80 it still feels like full hot. What we did notice is that if you move the temp down from 65 to LO you can hear a vent changing position and the temperature goes down. It will do this independently on either side or together on both sides. The AC will still blow cold when you move that temp down to LO. The fan still works properly and so do the different air direction settings (defrost, feet, normal, etc). We are thinking it may be some kind of sensor or resistor that has failed. Has anybody else here had the same experience or know a good way to search for a similar problem with a solution on this forum.
Full heat problem with climate control
- Thread starter TCH Hoser
- Start date
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Get the FSM from here
http://www.toyota-4runner.org/4th-gen-t4rs/100275-service-manual-download-links.html
Find the "Symptom Related Diagnostic Procedure" chart in the Heating and Air Conditioning section. It will walk you through identifying the problem.
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http://www.toyota-4runner.org/4th-gen-t4rs/100275-service-manual-download-links.html
Find the "Symptom Related Diagnostic Procedure" chart in the Heating and Air Conditioning section. It will walk you through identifying the problem.
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If you look down in front of the drivers knee there is a small spot with little cutouts [like half an inch or less]. behind this there is a sensor that has to do with your hvac make sure it is plugged in I unplugged mine when the remote start was installed and had the same simptoms you are describing.
Cheers Maineiac
Cheers Maineiac
progress4m
Member
I would recommend to check air temp sensor inside of the vehicle; for single (not dual ) climate control it is located on the right lower part of the dash on the driver side (next to the drive knee); for dual climate control you may have two of them: on the driver and passenger sides....
From your description it is definitely sound like that sensor (s) either has failed or has been disconnected…
From your description it is definitely sound like that sensor (s) either has failed or has been disconnected…
CNJ Runner
New member
the same thing happened to me when bestbuy installed my alarm. I took it back to them immediately and they fixed it. Ive only heard of this with alarm installs.
