If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
evaporator temp probe
How important is the placement of the evaporator temp probe in the
evaporator? Can the misplacement cause a vent temp problems? History is my 1998 Caravan 3.3 had the evaporator replaced earlier this month and I have always been able to get 45deg in rec. mode,Now the lowest it will go is 53deg and I have to use the fastest fan speed. If I use my normal second fan speed it will raise to 60deg. Have been back to the chrysler dealer 3 times now and they continue to tell me pressures are normal. What are they missing? Thanks for any help JohnR |
Ads |
#2
|
|||
|
|||
|
#3
|
|||
|
|||
> wrote in message oups.com... > How important is the placement of the evaporator temp probe in the > evaporator? Can the misplacement cause a vent temp problems? > History is my 1998 Caravan 3.3 had the evaporator replaced earlier > this month and I have always been able to get 45deg in rec. mode,Now > the lowest it will go is 53deg and I have to use the fastest fan speed. > If I use my normal second fan speed it will raise to 60deg. > Have been back to the chrysler dealer 3 times now and they continue to > tell me pressures are normal. What are they missing? > > Thanks for any help > JohnR Sure let Daniel give you false info again, The probe on the vehicle has to go all the way in untill it stops, thats the way it is designed The new evaporator that was installed has a hole set up for the probe to be inserted. And Mr Stern should know by now that pressures have alot to do with proper effiency, To low and to high of pressures will cause lack of cool air. You dont say what the ambient temperature is where you are from and that could have an effect on evap temp also, this chart is for your vehicle Glenn Beasley Chrysler Tech A/C PERFORMANCE TEMPERATURES AMBIENT TEMPERATURE 21°C (70°F) 26.5°C (80°F) 32°C(90°F) 37°C (100°F) 43°C (110°F) AIR TEMPERATURE AT LEFT CENTER PANEL OUTLET 1-8°C (34-46°F) 3-9°C (37-49°F) 4-10°C (39-50°F) 6-11°C (43-52°F) 7-18°C (45-65°F) COMPRESSOR DISCHARGE PRESSURE AFTER THE FILTER DRIER 1034-1724 kPa(150-250 PSI) 1517-2275 kPa(220-330 PSI) 1999-2620 kPa(290-380 PSI) 2068-2965 kPa(300-430 PSI) 2275-3421 kPa(330-496 PSI) EVAPORATOR SUCTION PRESSURE 103-207 kPa(15-30 PSI) 117-221 kPa(17-32 psi) 138-241 kPa(20-35 PSI) 172-269 kPa(25-39 PSI) 207-345 kPa(30-50 PSI) > |
#4
|
|||
|
|||
Thanks for the reply guys.
heres more info The vent temps I quote are both on 95deg days and 70deg nights the only difference is that during the day it takes much longer to cool because of all that glass in the van. The fan speed it still true fan speed high ,vent temp gets to 53deg turn it to second speed and the vent temp starts to go up after 15 minutes its at 60deg. I pinched off both heater hoses to the heater core no difference and when I push the rec. mode button I hear door close with increase in air movement noise. the question of the placement of the probe is that I asked for the parts back and on the old evap. I can see where it was supposed to be from the factory. It just so happens that on my van getting to the temp probe is pretty easy to see and it is not in the same position as the original. it is now much closer to the bottom of the evap. as evap. would sit in an installed position. Glenn those pressures you list are much higher than the 2.2 Times the ambient temp. that I've heard about. what gives? does this Caravan need higher liquid line pressure to operate correctly. are you saying that my high side should be 290-380 PSI on high side at 90deg? maxpower wrote: > > wrote in message > oups.com... > > How important is the placement of the evaporator temp probe in the > > evaporator? Can the misplacement cause a vent temp problems? > > History is my 1998 Caravan 3.3 had the evaporator replaced earlier > > this month and I have always been able to get 45deg in rec. mode,Now > > the lowest it will go is 53deg and I have to use the fastest fan speed. > > If I use my normal second fan speed it will raise to 60deg. > > Have been back to the chrysler dealer 3 times now and they continue to > > tell me pressures are normal. What are they missing?> > > > Thanks for any help > > JohnR > > Sure let Daniel give you false info again, The probe on the vehicle has to > go all the way in untill it stops, thats the way it is designed The new > evaporator that was installed has a hole set up for the probe to be > inserted. > > And Mr Stern should know by now that pressures have alot to do with prop= er > effiency, To low and to high of pressures will cause lack of cool air. > > You dont say what the ambient temperature is where you are from and that > could have an effect on evap temp also, this chart is for your vehicle > > Glenn Beasley > Chrysler Tech > > > A/C PERFORMANCE TEMPERATURES > AMBIENT TEMPERATURE 21=B0C (70=B0F) 26.5=B0C (80=B0F) 32=B0C(90=B0F= ) 37=B0C (100=B0F) > 43=B0C (110=B0F) > AIR TEMPERATURE AT LEFT CENTER PANEL OUTLET 1-8=B0C (34-46=B0F) 3-9= =B0C > (37-49=B0F) 4-10=B0C (39-50=B0F) 6-11=B0C (43-52=B0F) 7-18=B0C (45-65=B0F) > COMPRESSOR DISCHARGE PRESSURE AFTER THE FILTER DRIER 1034-1724 > kPa(150-250 PSI) 1517-2275 kPa(220-330 PSI) 1999-2620 kPa(290-380 PSI) > 2068-2965 kPa(300-430 PSI) 2275-3421 kPa(330-496 PSI) > EVAPORATOR SUCTION PRESSURE 103-207 kPa(15-30 PSI) 117-221 kPa(17-32 > psi) 138-241 kPa(20-35 PSI) 172-269 kPa(25-39 PSI) 207-345 kPa(30-50 PSI) >=20 >=20 > > |
#5
|
|||
|
|||
|
#6
|
|||
|
|||
Daniel they say it's in spec. I say it not cold enough. They've have
the car 3 times and it comes back the same. They have my money. I just think, as Glenn says something is wrong and now that he has provided me a temp/ pressure chart from Chrysler I can ask them to use it to recharge my van. Who knows how they're recharging it, if they even are. By weight or just 2.2 times ambient temp.Its just that the Chrysler chart says high side should be 290-380 psi @ 90deg much higher then I've read it should be 198/207 psi @90 .Why is Chrysler so much higher? |
#7
|
|||
|
|||
> wrote in message oups.com... > Daniel they say it's in spec. I say it not cold enough. They've have > the car 3 times and it comes back the same. They have my money. I just > think, as Glenn says something is wrong and now that he has provided me > a temp/ pressure chart from Chrysler I can ask them to use it to > recharge my van. Who knows how they're recharging it, if they even are. > By weight or just 2.2 times ambient temp.Its just that the Chrysler > chart says high side should be 290-380 psi @ 90deg much higher then > I've read it should be 198/207 psi @90 .Why is Chrysler so much higher? Your system has a feature that will calibrate itself, If the doors were out of positon it will reset them to specs. If the door cannot be reset it will generate a fault code at the panel, I think Mr Stern Thinks we are working on a Dodge Shadow or an Acclaim. you can do this test yourself, im sure the dealer already did it, or hope they would have CALIBRATION/DIAGNOSTICS TEST ENTRY TO INITIATE TESTS: a.. Set Blower motor ON HIGH b.. Set Mode position to Panel c.. Open all A/C outlets d.. Set Temperature to Cold (Both slide pots if equipped) e.. Depress WASH and REAR WIPER button simultaneously for 5 Seconds (Until all LED's light) RESULTS: a.. All LED's will turn on for 5 Seconds b.. Calibration Test is running when REAR WIPER and INTERMITTENT are alternately flashing. Cooldown test is running if A/C and RECIRC are alternately flashing. c.. Acceptable results is REAR WIPER LED is the only LED flashing. Push Rear Wiper to exit. d.. After all tests have passed, Calibration Diagnostics and Cooldown can be run separately. COOLDOWN TEST ENTRY TO INITIATE TESTS: a.. Set Blower motor ON HIGH b.. Set Mode position to Panel c.. Open all A/C outlets d.. Set Temperature to Cold (Both slide pots if equipped) e.. Depress WASH and A/C simultaneously for 5 Seconds NOTE: Prior to start of test, If the evaporator is already cold, the system will fail test. To correct, operate system with A/C OFF and the blower motor ON high for three minutes prior to starting test. RESULTS: a.. All LED's will turn on for 5 Seconds a.. Cooldown Test is running when A/C and RECIRC. are alternately flashing. If A/C and RECIRC. are flashing simultaneously, Cooldown has failed. > |
#8
|
|||
|
|||
Glenn I ran the recalibrate procedure no errors returned
Is that chart you posted correct that I should be 290-380 psi @ 90deg. Why so high? Do you think the tech would have used recharge by freon weight ,the pressure/temp chart or just 2.2 times ambient temp. refill procedure. I feel personally that it was 2.2 times way, that would explain why my vent temps are higher and it takes so long to get cool.not enough freon. do all chrysler products use that same chart or only Caravan? |
#9
|
|||
|
|||
|
#10
|
|||
|
|||
Daniel I've been to this site
http://www.acsource.net/acforum/viewforum.php?f=1 and their previous site http://www.aircondition.com/wwwboard/ thats where the 2.2 times ambiant temp comes |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Ford Probe '97 4-cyl brief power loss | [email protected] | Technology | 5 | June 18th 05 09:15 AM |
Ford Probe '97- occasionally doesn't start | [email protected] | Technology | 1 | May 4th 05 01:35 AM |
'96 Ford Probe won't smog due to lack of engine codes... | [email protected] | General | 8 | February 1st 05 09:35 PM |
'96 Ford Probe won't smog due to lack of engine codes... | [email protected] | Technology | 8 | February 1st 05 09:35 PM |
Catalytic Convertor Lambda Probe | Ian Gaskell | Audi | 0 | May 21st 04 05:14 PM |