Question about 2003 Ford Explorer

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Tempurature switch won't switch from cold to hot just hear a clicking noise inside passenger compartment?

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Under the dash board there are little valves with vacuum lines running to them listen for the door that is clicking that would be your problem area.

Posted on Sep 30, 2010

  • jj3320papp Oct 02, 2010

    that helped narrow it down . thank you. I have heard about vacuum lines from several people. I can't afford to take this to a dealer/mechanic because i've been laid off for 10n mths. So i need step by step instructions because i don't Know how to teaR MY DASH APART TOFIND THIS VACUUM LINE. But Thank you for leading me in the right direction.Really. If you can help anny more it would be appreciated. but like i said i can't afford to pay annything right now.

  • jj3320papp Oct 02, 2010

    Well after 4 hours tearing apart the dash i finally found the defective part. Turned out not to be a vacuum line or actuator.after tracing every vacuum line i almost gave up. but the Whole time i kept seeing this White Electricl gear box about the size of a wallet so finally i turned the switch till i heard the clicking and put my hand on the box sure this was it.the ford dealer had it in stock part # 1L2Z-19E616-CA description 008G Motor A price $69.53. Thank you johnlucas105 for directing me to the right area to start before reply i didn't have a clue where to start (under the hood or dash etc. ) So Thanx again.If anyone else has this problem i hope this helps but be warned this gearbox is in very tight quarters and was very difficult to get out and put back in.


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1st thing you can check is to open the hood and have a helper turn the AC switch on and off and listen for a clicking noise from the engine compartment. If you hear this clicking noise everytime the AC is turned off and on then it is likely the AC compressor is working okay which would likely mean your blend door and actuator is stuck or has malfunctioned somehow. In either case they are both jobs for skilled tech's do to the likelyness of having to remove the IP to change them. If you do not hear any clicking noise under the hood then check all fuses and if they are all okay then I would recommend taking your car to a local tech that is AC certified do to the complexity of an AC system. Hope this helps.

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we are going to listen for a clicking noise, the noise that we are listening for is the Compressor engagement being activated after three seconds from the control panel.

Start the engine and switch on the air conditioning by pressing the AC button (with a request for maximum cold temperature and the passenger compartment fan running).

If you hear that clicking noise, then it is most likely that you have a leak from the AC system or a possibly in need of a top up do to service of the system not been carried out.

Otherwise if you don't hear that clicking noise then there is a case that the Compressor clutch is not being engaged.

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2. AC Compressor faulty

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4. If there is not the slightest bit of pressure left in the system which is very unlikely.

I hope this information was somewhat helpful for a real diagnosis test a diagnostic tool is needed.


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