I have a 2006 Laramie Mega 5.9L and the evaporator core temp sensor failed a few months ago. It was confirmed by a friend with an A/C machine showing my compressor cycling like crazy and lines freezing up. Since he owns a shop, he called a Mopar dealer that he regularly uses and tried to order one only to find out it was back ordered. Since I live in Texas and A/C gets used all the time, I had him check up on the part Thursday and he found out Mopar discontinued it and now I’m S.O.L. I’ve searched everywhere I can think of, including here, and still can’t find a solution so I’m really hoping y’all can point me in the right direction.
Evaporator Core Temp Sensor Discontinued
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Does anyone know if this part or a work around part has been made and is available?
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32 Posts
So did anyone ever figure out a work around for this? My has taken a crap and I need to figure out how to fix it.
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3 Posts
Did you have any luck finding a work around for this evaporator temperature switch? We are having the same problem
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11,879 Posts
Some info in these 2 threads may help.
www.cumminsforum.com
www.cumminsforum.com
AC Temperature Sensor hack??
Anyone know how to swap the air conditioning probe sensor that’s in the evaporator? I saw a write up somewhere but can’t seem to figure it out ....From part number 5140727aa to part number 68004239AA. I cut a little window in the housing and I noticed that I have the sensor that gets stuck in...
www.cumminsforum.com
A/C not cool enough/ compressor cycling
I have got vent temps at 60 on a 80 degree day here and the passenger side vents are warm compared to the 60 deg drivers side. I have read this is mostly caused by low freon so i hook my gauges up and i had 42psi on low side and 350psi on high side. Seems to high on the high side at least...
www.cumminsforum.com
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32 Posts
Well I ended up going to the junkyard and pulling sensors out of two different trucks, ‘03 and ‘05 1500s. It was throwing another code as well and so we didn’t install the sensor. I took my panel off around my heater switch and ac button and it turned out it had a loose connector that wasn’t allowing everything to work properly. Fixed the connector and my ac is working great.
I would get one from a wrecked truck. It’s pretty easy as you just bash your way into the evap unit from the glovebox and then carefully pull the sensor out.
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6 Posts
Having same problem did anyone figure out the solution or know what the resistors ohms is at 80f ? Please and Thankyou in advance
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13 Posts
What did you finally do, I have the exact same issue and need that part now. There has to be a work around. Thanks, Ken
Soo I had this issue on my 06 5.9 3500. Not sure if it was like that when I bought is or happened after I replaced my ac flaps and evap/heater core but my temp sensor died. I took and added a resistor to trick the ac computer to a set evap temp(1st pic) but the compressor and fan clutch stayed engaged all the time. Not good for the compressor and killed my mileage. So after much research and trial/error I for a Ford part that works… I know. I know, it a ford part but it’s available, cheap and it’s works so the ac works as design. Part number YH1735. Link to Amazon Motorcraft Sensor https://a.co/d/54RDKcT
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189 Posts
Wow. Now that's some quality stuff right there!
Good job!
2006 3500 Laramie Mega Cab 5.9 G56 bought on 10/7/21 '03 F250 PSD, bulletproof, 6" lift, 37s
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68 Posts
@GradyB It's been a few months. Is it still working? Can you report on on how well it's working? Also, is yours a dual zone or single?
I'm assuming you changed out the Ford plug so it would fit the Dodge plug. Could you tell/show us how you made the connections?
Reason for my concern is it's easy to introduce additional resistance, or reduce same, by changing wire length, diameter, adding splices etc.
Additionally, it looks shorter than the OE probe which will also affect resistance/function.
However, if it works, it works!
Also, which evap did you use? Is that a parallel flow evap? They are supposedly more efficient and have higher capacity, thus changing the ideal amount of R134 in terms of weight. I could be mistaken on this as I was diverted from that research to looking for a prob workaround. Could you tell us how much refrigerant was used to recharge your system?
There is a long (almost a year), but excellent thread about the probe and controler on the TDR forum but ultimately ends with no certain workaround for the probe. The Engineer doing most of the research work on the probe just disappeared about a year ago. So, finding this thread gives me great hope for a viable solution.
Also, it was thought that these probes were made by Bosch. So if anyone has the connections or ability to find out what else they went in could help a lot. Just because Dodge quit using them doesn't mean Bosch quit making them.
Thank you so much for sharing your work and this workaround. I have been pulling my hair out, what little I have left, and reading for hours & hours, looking for a solution.
I will order this probe regardless, just so I'll have it.
It may be a while, but I'll report my own findings here when I'm done.
Again, thanks
Brodie
I'm assuming you changed out the Ford plug so it would fit the Dodge plug. Could you tell/show us how you made the connections?
Reason for my concern is it's easy to introduce additional resistance, or reduce same, by changing wire length, diameter, adding splices etc.
Additionally, it looks shorter than the OE probe which will also affect resistance/function.
However, if it works, it works!
Also, which evap did you use? Is that a parallel flow evap? They are supposedly more efficient and have higher capacity, thus changing the ideal amount of R134 in terms of weight. I could be mistaken on this as I was diverted from that research to looking for a prob workaround. Could you tell us how much refrigerant was used to recharge your system?
There is a long (almost a year), but excellent thread about the probe and controler on the TDR forum but ultimately ends with no certain workaround for the probe. The Engineer doing most of the research work on the probe just disappeared about a year ago. So, finding this thread gives me great hope for a viable solution.
Also, it was thought that these probes were made by Bosch. So if anyone has the connections or ability to find out what else they went in could help a lot. Just because Dodge quit using them doesn't mean Bosch quit making them.
Thank you so much for sharing your work and this workaround. I have been pulling my hair out, what little I have left, and reading for hours & hours, looking for a solution.
I will order this probe regardless, just so I'll have it.
It may be a while, but I'll report my own findings here when I'm done.
Again, thanks
Brodie
Hey. It’s working great. Mine is a dual zone. No issues to report so far in Houston heat. As far as the connector they were close enough where I just shoved the factory dodge connector into the Ford sensor connector and kind of left it like that and hasn’t been an issue. I replaced the evaporator with an OE from Dodge.
As far as refrigerant spec I just filled it up to watch Dodge says which is a little under 2 pounds
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As far as refrigerant spec I just filled it up to watch Dodge says which is a little under 2 pounds
2006 3500 Laramie Mega Cab 5.9 G56 bought on 10/7/21 '03 F250 PSD, bulletproof, 6" lift, 37s
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68 Posts
Well, that's awesome! I'm running out of time so that's what I'll do.
Thanks for letting us know it's working good!
Thanks for letting us know it's working good!
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2 Posts
Hi, not sure at 80deg but I am have freez up issues as well, looking at the voltage and sensor data it seems the reading is inverted, when the temp drops in the evap( then freezes) when the temp (scanner) reading goes up to about 58 deg F and the compressor does not shut off, the low side drops to 0 pressure. Looks to me like the system is reading the wrong temp or the temperature probe is inverted. Anyone been able to read the temps on the scanner?
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2 Posts
What were your voltage readings, my sensor seems to be reading inverted, when the temperature drops in the evap the scanner reads the temperature riseing and when the evap temp gets to 58 deg it is freezing up and the compressor is not shutting off?
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