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AC controls not working, 98

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Old Feb 18, 2013 | 06:00 PM
  #11  
poorman212's Avatar
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From: Kenton, TN
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Yea, the snow was just a mess maker.....I hate the white stuff, just cold.

With manual controls, it could be as simple as the bulbs going.....sometimes they make contact, sometimes they do not.

Is this the "backlight"?
 
Old Feb 18, 2013 | 08:12 PM
  #12  
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The Resistor is behind the Glove Box. It is secured with 2 Phillips screws. When you look under the GB, turn your head towards the fender side and you will see the plug. Resistors get old and fail over time. This resistor works with your AC Control Module, located behind the 2 Control *****. When it fails, you lose everything but the Fan Control. There is a Fan Control Relay in the box under your hood that may also have been damaged. It costs about $20. You need to take out the console plate and unplug everything to get to it. It's much easier than it sounds. Be careful not to crack the console when you pop it out. There is no need to take the whole console out. Once you unplug the 4-way flasher and clock, the console plate can be popped out allowing you to unplug the rest of the wiring.
If you search these threads enough, you will see that this is a common problem. I called a Honda dealer and his first thought was a Compressor failure. Who could of seen that coming?! As you get more miles, the resistor will begin to fail and your LED lights on the AC Panel will flicker. After a while they will not even work.
 
Old Feb 19, 2013 | 06:27 PM
  #13  
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I know this is a bit of an eye chart.......and with the size this might be viewed at, even worse.
 
Attached Thumbnails AC controls not working, 98-6th-gen-hvac-cir-eye-chart.jpg  
Old Feb 19, 2013 | 08:56 PM
  #14  
Random Cheese's Avatar
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Marky C, could it be the evaporator temperature sensor? Looking at the diagram poorman provided, I don't see a resistor in the power supply line to the ac controls, just the sensor.
 

Last edited by Random Cheese; Feb 19, 2013 at 09:06 PM.
Old Feb 19, 2013 | 09:30 PM
  #15  
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There sounds like some erroneous info. in this thread. The blower motor resistor shouldn't affect the lighting on the climate control unit.
 
Old Nov 21, 2025 | 04:00 PM
  #16  
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ok, this is old but here it goes... everybody is just going around "like chickens without the heads"
The most likely cause for the entire climate control going "out", all the buttons at once, is age of the board and it's common cause on old Accords (probably other Hondas too). Invisible cracks develop on the circuit board and one of them is the power line and/or control of the power for the board.
Yes, I had this happen with my '98 Accord. The fix was to remove the climate control and resold/reflow every point I could get the soldering iron on. It's all surface mounting devices (SMD) so they are very small. Some of them I could not get to but all others I could solved the issue.
Recently, the cabin recirculation button went dead on me, so it's always fresh inside the car..... not fun during Winter...... or Summer when you really want your cold air in.
Anyway, since everything else works, it tells me that fuses are good so, I'll remove the board once more and reflow "more", then check the connector pin that activates the recirculation motor, and only then I'll go after other parts - might need a new climate control but there is plenty and cheap on ebay
 
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