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'03 Accord A/C Problem Codes?
We have a 2003 Accord V-6 w/Nav and auto heat and A/C. Lately, there
has been a problem with the A/C suddenly coming on and blowing very cold air when it doesn't need to. My experience with auto systems has always been that the A/C runs most of the time, and the heater is modulated to maintain the set temperature. I have never seen one that blasts out cold air at seemingly random times when the car has been running for a while. I know it will do that when a car is hot, and you first start it up. It never did this until a couple of months ago. I took it to the dealer, and they said the tech tried it out and it seemed normal to him. They also said there is no computer test for the A/C per se, and they would have to take the underdash unit out to check it. I think that is complete hogwash. I can't imagine a 2003 vehicle that can't be diagnosed for system problems without taking everything apart. Even our 1993 Jeep has pages of diagnostic codes related to the automatic HVAC system. I don't have the shop manuals for the Accord. Can someone tell me if the dealer is full of prunes or not? Dick -- Posted via a free Usenet account from http://www.teranews.com |
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#2
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'03 Accord A/C Problem Codes?
Dick wrote:
> We have a 2003 Accord V-6 w/Nav and auto heat and A/C. Lately, there > has been a problem with the A/C suddenly coming on and blowing very > cold air when it doesn't need to. My experience with auto systems has > always been that the A/C runs most of the time, and the heater is > modulated to maintain the set temperature. I have never seen one that > blasts out cold air at seemingly random times when the car has been > running for a while. I know it will do that when a car is hot, and > you first start it up. It never did this until a couple of months > ago. > > I took it to the dealer, and they said the tech tried it out and it > seemed normal to him. They also said there is no computer test for > the A/C per se, and they would have to take the underdash unit out to > check it. I think that is complete hogwash. I can't imagine a 2003 > vehicle that can't be diagnosed for system problems without taking > everything apart. Even our 1993 Jeep has pages of diagnostic codes > related to the automatic HVAC system. I don't have the shop manuals > for the Accord. Can someone tell me if the dealer is full of prunes > or not? > > Dick > =================================== Your suspicions sound right. Why not just get a manual off eBay? Are you keeping your rad and reservoir above the MIN mark? Your computer can start doing all kinds of unusual things if the coolant level in the rad gets low. Just a thought. 'Curly' |
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'03 Accord A/C Problem Codes?
On Wed, 14 Mar 2007 04:11:19 -0700, motsco_ >
wrote: >Dick wrote: >> We have a 2003 Accord V-6 w/Nav and auto heat and A/C. Lately, there >> has been a problem with the A/C suddenly coming on and blowing very >> cold air when it doesn't need to. My experience with auto systems has >> always been that the A/C runs most of the time, and the heater is >> modulated to maintain the set temperature. I have never seen one that >> blasts out cold air at seemingly random times when the car has been >> running for a while. I know it will do that when a car is hot, and >> you first start it up. It never did this until a couple of months >> ago. >> >> I took it to the dealer, and they said the tech tried it out and it >> seemed normal to him. They also said there is no computer test for >> the A/C per se, and they would have to take the underdash unit out to >> check it. I think that is complete hogwash. I can't imagine a 2003 >> vehicle that can't be diagnosed for system problems without taking >> everything apart. Even our 1993 Jeep has pages of diagnostic codes >> related to the automatic HVAC system. I don't have the shop manuals >> for the Accord. Can someone tell me if the dealer is full of prunes >> or not? >> >> Dick >> >=================================== > >Your suspicions sound right. Why not just get a manual off eBay? Are you >keeping your rad and reservoir above the MIN mark? Your computer can >start doing all kinds of unusual things if the coolant level in the rad >gets low. Just a thought. >'Curly' Thanks Curly. I'll check it this morning. Although just having come back from the dealer for routine service, they should have topped off all fluids. Dick -- Posted via a free Usenet account from http://www.teranews.com |
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'03 Accord A/C Problem Codes?
Dick > wrote in news:53uev2to6od5efsigalcn3utlt6q4sj7gf@
4ax.com: > We have a 2003 Accord V-6 w/Nav and auto heat and A/C. Lately, there > has been a problem with the A/C suddenly coming on and blowing very > cold air when it doesn't need to. My experience with auto systems has > always been that the A/C runs most of the time, and the heater is > modulated to maintain the set temperature. I have never seen one that > blasts out cold air at seemingly random times when the car has been > running for a while. I know it will do that when a car is hot, and > you first start it up. It never did this until a couple of months > ago. Your interior temp control is probably ultimately effected through the use of motor-activated blend doors. I don't have a service manual for the Accord, but the RSX has a heater control valve, which is also operated by a motor. The problems you describe sound like blend doors not opening and closing properly. This may be electrical or mechanical. The Service Manual will have a large troubleshooting section on the A/C, as well as copious, well-executed diagrams showing how the system works. Of course, none of that means anything if the mechanic is too lazy to open the book... The dealership should also check for TSBs, in case this is a known issue. > > I took it to the dealer, and they said the tech tried it out and it > seemed normal to him. They also said there is no computer test for > the A/C per se, and they would have to take the underdash unit out to > check it. I think that is complete hogwash. You are correct. There IS a "chicken dance" that must be performed in order to extract trouble codes from the A/C control unit. This "dance" is detailed in the service manual, which your dealership surely has a copy of. > I can't imagine a 2003 > vehicle that can't be diagnosed for system problems without taking > everything apart. Even our 1993 Jeep has pages of diagnostic codes > related to the automatic HVAC system. I don't have the shop manuals > for the Accord. Can someone tell me if the dealer is full of prunes > or not? He not full of prunes, he's full of what you eventually get when you eat lots of prunes. By the way, your warranty MAY still be in effect. Check your purchase agreement. This is something that should be covered, even if you're just out of warranty. -- Tegger The Unofficial Honda/Acura FAQ www.tegger.com/hondafaq/ |
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'03 Accord A/C Problem Codes?
Tegger > wrote in
: > Dick > wrote in > news:53uev2to6od5efsigalcn3utlt6q4sj7gf@ 4ax.com: > >> We have a 2003 Accord V-6 w/Nav and auto heat and A/C. Lately, there >> has been a problem with the A/C suddenly coming on and blowing very >> cold air when it doesn't need to. My experience with auto systems >> has always been that the A/C runs most of the time, and the heater is >> modulated to maintain the set temperature. I have never seen one >> that blasts out cold air at seemingly random times when the car has >> been running for a while. A questionoes this only happen when you have the system turned to "Defrost"? And what's "a while"? -- Tegger The Unofficial Honda/Acura FAQ www.tegger.com/hondafaq/ |
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'03 Accord A/C Problem Codes?
On Wed, 14 Mar 2007 23:54:10 +0000 (UTC), Tegger >
wrote: >Tegger > wrote in : > >> Dick > wrote in >> news:53uev2to6od5efsigalcn3utlt6q4sj7gf@ 4ax.com: >> >>> We have a 2003 Accord V-6 w/Nav and auto heat and A/C. Lately, there >>> has been a problem with the A/C suddenly coming on and blowing very >>> cold air when it doesn't need to. My experience with auto systems >>> has always been that the A/C runs most of the time, and the heater is >>> modulated to maintain the set temperature. I have never seen one >>> that blasts out cold air at seemingly random times when the car has >>> been running for a while. > > > >A questionoes this only happen when you have the system turned to >"Defrost"? > >And what's "a while"? A while is after the engine gets up to temperature. But I have also seen it start throwing out cold air shortly after leaving home. It could be 45 degrees outside and the A/C comes on. Before all this started, the system would not put out anything at that temp until the engine was warm, then it would begin heating gently. The system is set to full automatic for normal heating and air conditioning. My side is usually set a couple of degrees warmer than my wife's side, but that shouldn't make any difference. -- Posted via a free Usenet account from http://www.teranews.com |
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'03 Accord A/C Problem Codes?
Dick > wrote in news:7d3hv2hvrs3uvfajbqrier1rt5372d4h83@
4ax.com: > On Wed, 14 Mar 2007 23:54:10 +0000 (UTC), Tegger > > wrote: >> >>A questionoes this only happen when you have the system turned to >>"Defrost"? >> >>And what's "a while"? > > A while is after the engine gets up to temperature. So before that the system acts normally? This is important. ALL details are important in these cases. > But I have also > seen it start throwing out cold air shortly after leaving home. Oh, okay... > It > could be 45 degrees outside and the A/C comes on. Before all this > started, the system would not put out anything at that temp until the > engine was warm, then it would begin heating gently. > > The system is set to full automatic for normal heating and air > conditioning. If set to full-auto, the A/C will operate while attempting to defrost/defog the windows. This is done in order to dehumidify the air so as to facilitate speedier defogging. If the blend doors fail to function correctly, you will feel the cold air coming out of the vents. You need to find a more diligent dealer. Honda provides dealers with piles of information on A/C troubleshooting over and above that available in the shop manual. -- Tegger The Unofficial Honda/Acura FAQ www.tegger.com/hondafaq/ |
#8
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'03 Accord A/C Problem Codes?
On Thu, 15 Mar 2007 00:27:46 +0000 (UTC), Tegger >
wrote: >> It >> could be 45 degrees outside and the A/C comes on. Before all this >> started, the system would not put out anything at that temp until the >> engine was warm, then it would begin heating gently. >> >> The system is set to full automatic for normal heating and air >> conditioning. > > > >If set to full-auto, the A/C will operate while attempting to >defrost/defog the windows. This is done in order to dehumidify the air >so as to facilitate speedier defogging. If the blend doors fail to >function correctly, you will feel the cold air coming out of the vents. > >You need to find a more diligent dealer. Honda provides dealers with >piles of information on A/C troubleshooting over and above that >available in the shop manual. Yes, I knew the A/C worked for defogging, but it shouldn't be ice-cold air. It should be heated. I agree, the blend doors are probably not working right. Problem with changing dealers is that the next one is 100 miles away. Maybe I can go to a good A/C shop. I know of one. -- Posted via a free Usenet account from http://www.teranews.com |
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