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Honda Accord Climate Control Questions

doug9doug9 Posts: 6
I bought a freon charging kit and charged the system. When I turn the A/C on I hear the compressor kick on. It blows out very hot air. The drivers side fan kicks on every couple of minutes. The passenger fan isn't on. The wires from the driver fan looks like they go to the compressor unit, so I figured the other fan was for the car cooling. I am not sure. Anyhow, I am looking for advice on what I could check. Why after charging the system is it blowing out very very hot air? Thank you for answers.


  • mrbill1957mrbill1957 Posts: 823
    Even if your A/C isn't working, if you have the temp lever set to the coldest setting, you should get air the same temp (or close to) the same temp as the outside air temp.

    The lever for the hot-cold control opens and closes a valve on the heater lines. If that valve isn't closing off, your basically running the heater the same time your trying to run the A/C.

    Trace the heater lines, usually by the firewall, you will find the inline valve. Make sure the lever on it is moving when you move the hot-cold lever.

    The second cooling fan only runs when the A/C compressor is running. I would visually look at the compressor to verify it is actually running (center is spinning).

  • doug9doug9 Posts: 6
    Thank you for the great advice. I started to switch the knob to change it from hot to cold and try to listen for the valve to open or close. So for some reason I decided to take the knob off. Low and behold and simple problem. The inside of the knob was broken and not actually turning the switch. I got some pliers and turned it from hot to cold and the air was cold as could be then. And all this first part of summer we have been driving with the windows down suffering in the heat. Thank you very much for pointing me in the right direction. Have a great summer. :)
  • bolivarbolivar Posts: 2,316
    This switch breaks a lot on this age of Hondas.
  • nedbrodnedbrod Posts: 2
    The AC in my 1994 Accord works fine but my problem is the throttle does not kick up when the AC is turned on. I am unable to locate what is called the AC idle boost valve. Are they talking about the adjustment screw on the throttle body? I have already reset the ECU but this had no effect. The real problem is that with out the idle boost operating the car stalls when stopping. Any ideas? Thanks.
  • thegraduatethegraduate Posts: 9,731
    Yep, my 1996 is on knob #4, and not with heavy use, mind you. They charged me for the first one, but haven't since then (for 3 and 4).
  • jtmathewjtmathew Posts: 3
    I've heard the AC compressor can go out because of insufficient protection around the compressor.

    Has anyone had this issue or found a way to fix it?

  • I have 1998 honda accord ex. After I tuned up my car at the repair shop, I'm having a difficult with climate control system. climate control board power light and effection (On/Off) is not steady. sometimes it goes on and off. and sometimes climate control power doesn't go off even I turned off engine and pulled out key. I want to know nature of this problem. Please provide me a solution for this issue. Thank you!
  • elroy5elroy5 Posts: 3,741
    The temperature knobs break because the cable will not move (binds up) as fast as you can turn the knob. Try this: turn the temperature knob only until you feel resistance (usually about half way), wait a few seconds, the cable will loosen, then you can turn it the rest of the way. I went through a few knobs before I figured this out too.
  • Please help me settle a bet with my stubborn boyfriend. Does the a/c need to stay on while I'm using the heat in the car? Example: It's winter & as I use the heat in the car I press the a/c button to turn it off because I thought it was only needed when the a/c "cooling" system is being used, like in the summer. He believes it is needed for both cooling & heating systems. Who is correct & why?
  • elroy5elroy5 Posts: 3,741
    The only time I put the AC on when heating, is if the windows are fogging. The AC will more quickly de-fog the windows. Then I turn the AC back off.
  • thegraduatethegraduate Posts: 9,731
    Elroy is correct. You may run the heat as long as you want to WITHOUT the A/C engaged. I do this most of the time in the winter, because it saves fuel. Running the A/C when the windows aren't fogging is unnecessary, and will drop your fuel economy. When you press the defrost/defog options on the climate control settings, the A/C engages automatically, because it is A/C is needed to remove fog from windows. Otherwise, don't run the A/C until you need air that is cooler than the exterior temperature.

    The heat comes off of the engine's heater core, and has nothing to do with the A/C compressor being engaged.

    Short version: You are correct, A/C is not needed to run the heat.
  • patpat Posts: 10,421
    Okay, so tell us what you won! ;)
  • Mr_ShiftrightMr_Shiftright Sonoma, CaliforniaPosts: 57,570
    Well Pat, if simpledizzy will look just behind that curtain......OOOOOOHHHHHH...that's right...a complete set of jersey cow slip covers from Crassco, the "car people".....congratulations!

    MODERATOR --Need help with anything? Click on my name!

  • The climate control in my 1995 Accord is intermittently completely dead. By this I mean that nothing at all lights up on the temperature display or the buttons when the key is turned on, then after a while (10-20 mins) it magically bursts into life. When it is working, it works perfectly. I have checked all the fuses and all are OK and seated correctly. The car is 100% standard, with no mods at all. If anyone can help me with a wiring diagram that would be very useful in tracing the fault, or if anyone has experienced this before and knows what it is, all help greatly appreciated.
  • elroy5elroy5 Posts: 3,741
    I don't know how to solve your problem, but I do have a question for you. Does the 95 Accord have a temperature display (auto climate control)? :confuse:
  • ray_h1ray_h1 Posts: 1,134
    I had a '96 Accord. After the car got totaled, I fished out the owner's manual and kept it. It references only a manual heating-A/C unit, regardless of trim level.
  • elroy5elroy5 Posts: 3,741
    I guess he was talking about the temperature control knob????? since there is no temp. display. :confuse:
  • Yes it does have a temp display and a control knob. You dial up the temp you want on the display using the control knob and the system either heats or cools to that temperature. The model is a 2.2 VTI-S - not sure if that makes a difference or not. The problem appears like it's a bad electrical connection to whatever control unit controls the air con
  • elroy5elroy5 Posts: 3,741
    This auto climate control came as stock equipment on a 95 Accord? :confuse:
  • Sure did. This was a top of the line Accord at the time. Do you know where I might find a wiring diagram?
  • elroy5elroy5 Posts: 3,741
    Unless you can find one on the internet, a service manual is all I can suggest. You may be able to find a used one somewhere (ebay). Or some people have seen them at the local library. Good luck
  • ray_h1ray_h1 Posts: 1,134
    What country are you in?
  • maich75maich75 Posts: 10
    Hi I have just joined the forum. I have a 2.2l SiR Accord that has the same problem with my climate control system. It comes on when its very hot, but only for a while then goes of. The display doesn't stay on or allow me to control it manual. As soon as I hit the A/C button, the thing goes off. I have tried disconnecting the black & grey plugs at the back of the control unit. The fan works permanently when the grey plug is disconnected, then goes of when I reconnect it. I was wondering if there is an internal temperature sensor which reads the internal temperature of the car and therefore regulates the climate control functions accordingly. Have you resolved the problem with yours and what is the solution? Please somebody help, I have a 1 month old baby and summers in London are very hot now so its no terrible hot in the car even with the windows open. Thanks.
  • maich75maich75 Posts: 10
    Hi, I am having the same problem as you with my 2.2i VTEC SiR. What solution did you find. Please help me out, I haven't found anyone one with an answer here in the U.K and am afraid of being ripped off. So far I have spent days waiting in garages and getting a 'no we do know what is wrong'.
  • patpat Posts: 10,421
    If no one here can help you, why don't you also post in the Climate Control Problems (Air Conditioning, Heat) - All Cars discussion. As you can see, it's not restricted to any one vehicle, but there may be someone there who can help.

    Good luck - let us know!
  • maich75maich75 Posts: 10
    Hi, did you ever fix the problem with your climate control. If you did, please share the solution. I have the exact problem you. Thanks.
  • patpat Posts: 10,421
    Maich75, did you see my reply to you? It's at this link in case you missed it: pat, "Honda Accord Climate Control Questions" #27, 12 Jun 2007 4:57 am.

    I gave you a suggestion of where else to ask for help with this. :)
  • maich75maich75 Posts: 10
    I saw your reply and did as you suggested. Sorry I thought I was dealing with two different people. So, what did you do about your problem? I am booked in at a local Honda Dealer for a half hour computer diagonistics. I hope they find and cure the problem. Thanks for your help.
  • patpat Posts: 10,421
    I don't have an Accord, I'm just the host. :)

    Good luck at the dealer - let us know what happens.

    P.S. I did have an 89 Accord that I loved. Never one thing wrong with it in ten years! :D
  • maich75maich75 Posts: 10
    Hi mumshonda, did you ever solve the problem with your Honda's Climate control. I have the exact problem you had. Did you find a solution and you did, would you mind to share it with me so I can have mine fixed. Hope to hear from you soon. Thanks.
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