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'95 Eagle Vision Air Conditioning
Can anyone point me at resources for troublshooting the air
conditioning in my '95 Eagle Vision? A copy of troubleshooting pages from a manual would be helpful ( I don't presently have a manual ) . The compressor isn't cycling on, and I need to know what the circuit that controls it looks like so I can check to see whether I've got broken wires, or a sensor that's not operating properly. I'm thinking it's probably something electrical/control related, because when I had problems with my '94 Voyager leaking, even when it was empty and I needed to add R134a, the compressor would cycle on so that I could begin the process of adding refrigerant. |
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A properly designed AC system will not turn on the compressor when the refrigerant has leaked out. When you add a small about of refrigerant to the low pressure side the pressure will increase enough for the compressor to come on. Bruce Baxter wrote: > > Can anyone point me at resources for troublshooting the air > conditioning in my '95 Eagle Vision? > > A copy of troubleshooting pages from a manual would be helpful ( I > don't presently have a manual ) . > > The compressor isn't cycling on, and I need to know what the circuit > that controls it looks like so I can check to see whether I've got > broken wires, or a sensor that's not operating properly. > > I'm thinking it's probably something electrical/control related, > because when I had problems with my '94 Voyager leaking, even when it > was empty and I needed to add R134a, the compressor would cycle on so > that I could begin the process of adding refrigerant. -- Mike Walsh West Palm Beach, Florida, U.S.A. |
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When I did connect a can of refrigerant (with dye and sealer, so that
it can be tested), two things happened: - I discovered my charging hose had a leak, so I'll have to get another one. - the compressor didn't cycle on. So I'll have to pursue the electrical avenue, and get a new charging hose. I notice that you can now get them with a guage on them. On Sat, 23 Apr 2005 13:26:17 GMT, Mike Walsh > wrote: > >A properly designed AC system will not turn on the compressor when the refrigerant has leaked out. When you add a small about of refrigerant to the low pressure side the pressure will increase enough for the compressor to come on. > >Bruce Baxter wrote: >> >> Can anyone point me at resources for troublshooting the air >> conditioning in my '95 Eagle Vision? >> >> A copy of troubleshooting pages from a manual would be helpful ( I >> don't presently have a manual ) . >> >> The compressor isn't cycling on, and I need to know what the circuit >> that controls it looks like so I can check to see whether I've got >> broken wires, or a sensor that's not operating properly. >> >> I'm thinking it's probably something electrical/control related, >> because when I had problems with my '94 Voyager leaking, even when it >> was empty and I needed to add R134a, the compressor would cycle on so >> that I could begin the process of adding refrigerant. > >-- > Mike Walsh > West Palm Beach, Florida, U.S.A. |
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Bruce Baxter wrote:
> Can anyone point me at resources for troublshooting the air > conditioning in my '95 Eagle Vision? ... > http://www.aircondition.com/wwwboard/ and/or http://www.autoacforum.com/categories.cfm?catid=2 |
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now the real bad news!!!!
the sealer is made to react with air so when it hits the air outside of the leak it seals and the leaks stops but when the sealer contacts the air in the system then it seals off hoses compressors and other internal parts rendering the whole system junk and i'm starting more and more of this junk do it we now have to have a 2000.00 tool to tell us techs when sealer is mixed in the systems so we do not contaminate other's systems and render equipment useless my dealer just paid 1500.00 to have one recycle machine repaired Bruce Baxter wrote: > When I did connect a can of refrigerant (with dye and sealer, so that > it can be tested), two things happened: > > - I discovered my charging hose had a leak, so I'll have to get > another one. > - the compressor didn't cycle on. > > So I'll have to pursue the electrical avenue, and get a new charging > hose. I notice that you can now get them with a guage on them. > > On Sat, 23 Apr 2005 13:26:17 GMT, Mike Walsh > > wrote: > > > > >A properly designed AC system will not turn on the compressor when the refrigerant has leaked out. When you add a small about of refrigerant to the low pressure side the pressure will increase enough for the compressor to come on. > > > >Bruce Baxter wrote: > >> > >> Can anyone point me at resources for troublshooting the air > >> conditioning in my '95 Eagle Vision? > >> > >> A copy of troubleshooting pages from a manual would be helpful ( I > >> don't presently have a manual ) . > >> > >> The compressor isn't cycling on, and I need to know what the circuit > >> that controls it looks like so I can check to see whether I've got > >> broken wires, or a sensor that's not operating properly. > >> > >> I'm thinking it's probably something electrical/control related, > >> because when I had problems with my '94 Voyager leaking, even when it > >> was empty and I needed to add R134a, the compressor would cycle on so > >> that I could begin the process of adding refrigerant. > > > >-- > > Mike Walsh > > West Palm Beach, Florida, U.S.A. |
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Bruce Baxter wrote:
> Can anyone point me at resources for troublshooting the air > conditioning in my '95 Eagle Vision? > > A copy of troubleshooting pages from a manual would be helpful ( I > don't presently have a manual ) . > > The compressor isn't cycling on, and I need to know what the circuit > that controls it looks like so I can check to see whether I've got > broken wires, or a sensor that's not operating properly. > > I'm thinking it's probably something electrical/control related, > because when I had problems with my '94 Voyager leaking, even when it > was empty and I needed to add R134a, the compressor would cycle on so > that I could begin the process of adding refrigerant. The first thing I'd do is put a pressure guage on it. If this car hasn't had an AC evaporator replaced, then its probably lost all its R-134a. The early LH cars had a lot of trouble with corroding the evaporator coil due to the materials changes needed for R-134a. The AC will NOT turn on until there is some minimum pressure in the system. When charging the system with refrigerant, the vapor pressure of the R-134a in the charging system pushes enough into the system to allow the compressor to kick on and complete the charging process. |
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The first level of diagnosis is complete.
I picked up a pressure guage at Walmart and checked the low side pressure. That's OK at a little over 60 PSI. I followed all the hoses around looking for a pressure switch on the low side of the system and didn't find any. The low side hose went from the manifold on top of the compressor to the H-Block. The other side of the H-Block ran to the condensor. The only pressure switch I saw was on the line going from the high side of the compressor, so I'm presuming that would be to keep the system from overpressurizing and turn the compressor off. Is there any other pressure switch on the low side? Perhaps inside the car? What do I have to take apart to get to it? If I had a pinout on the Relay socket, what would I expect to see there? Does anyone have a pinout that shows this? On Sat, 23 Apr 2005 09:43:43 -0400, Mr. Elbe > wrote: >On Sat, 23 Apr 2005 12:57:40 GMT, (Bruce Baxter) >wrote: > >>Can anyone point me at resources for troublshooting the air >>conditioning in my '95 Eagle Vision? >> >>A copy of troubleshooting pages from a manual would be helpful ( I >>don't presently have a manual ) . >> >>The compressor isn't cycling on, and I need to know what the circuit >>that controls it looks like so I can check to see whether I've got >>broken wires, or a sensor that's not operating properly. >> >>I'm thinking it's probably something electrical/control related, >>because when I had problems with my '94 Voyager leaking, even when it >>was empty and I needed to add R134a, the compressor would cycle on so >>that I could begin the process of adding refrigerant. > >The compressor clutch is activated via the compressor clutch relay in >the power distribution box in the engine bay at the driver's side >fender. This relay is in turn picked based on input from the A/C >pressure transducer located at the bottom passenger side of the >condenser, evaporator temperature sensor, and pushbutton or automatic >temperature setting. > >If the pressure is too low, then the relay will not activate. The >relay also will not activate or will not de-activate if the evaporator >temp sensor is flaky. This is the problem in my case. I bypassed all >this and connected a dash switch to directly activate the relay. >Downside is that I have to cycle manually to de-ice the evaporator. > >In your case, first check that there is enough pressure in the system. >If yes, check the pressure transducer and see if it conducts. |
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