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ok so the part arrived and sure enough looks like it will fit!
so just slide the evap sensor over the pigtail lining up the tab on the side....
strip off a little from the end of the pigtail and I poked the ends into the taurus side of the connector just to test it and see that I was reading a correct temp
stuff the evap sensor into the floor vent next to the accelerator
now I drove around with forscan monitoring the "evap sensor temp" and the ACcompressor as I have earlier in the thread. The temp was fluxtuating properly and AC would engange and disengage as expected!!!
Ambient Air was approx 84 degrees and the most problems I have had are in the 90 degree range when the AC dies so I am waiting to see what results I get at higher ambient temps.
But I am VERY hopeful with this workaround. I can see a vent temp within 5 degrees of my manual stick thermometer in the vent and it sweeps lower and higher depending upon selection at the control. I have not had extended testing but will watch it over the next few days. I am hoping we get a 90+ day to give it a good test.
Once I am satisfied with the repair I will add a zip tie to hold the sensor in the vent and I will cut the pigtail off the other sensor I bought and tidy up the wires a bit to make it pretty.
Since the new sensor isn't in the "ideal" location, I wouldn't expect it to perform exactly the same. Sounds like "pretty close" *might* be good enough!
Did this solve your issue? And if so what was the final part composed of? So I can give this a shot.
Originally Posted by Out4trout
ok so the part arrived and sure enough looks like it will fit!
so just slide the evap sensor over the pigtail lining up the tab on the side....
strip off a little from the end of the pigtail and I poked the ends into the taurus side of the connector just to test it and see that I was reading a correct temp
stuff the evap sensor into the floor vent next to the accelerator
now I drove around with forscan monitoring the "evap sensor temp" and the ACcompressor as I have earlier in the thread. The temp was fluxtuating properly and AC would engange and disengage as expected!!!
Ambient Air was approx 84 degrees and the most problems I have had are in the 90 degree range when the AC dies so I am waiting to see what results I get at higher ambient temps.
But I am VERY hopeful with this workaround. I can see a vent temp within 5 degrees of my manual stick thermometer in the vent and it sweeps lower and higher depending upon selection at the control. I have not had extended testing but will watch it over the next few days. I am hoping we get a 90+ day to give it a good test.
Once I am satisfied with the repair I will add a zip tie to hold the sensor in the vent and I will cut the pigtail off the other sensor I bought and tidy up the wires a bit to make it pretty.
Reply: what parts did you end up buying and what did you put together to get the final product going into the vent? And is the 75k resistor still intact? Or did it get substituted by the part you came up with and placed on the vent?
Short answer yes it works!
there are a couple slight issues in particular temperature ranges where you’ve got to manually turn off or on the AC and make it work.
resistor no longer needed.
I have meant to post a final picture of what I did, and just never got around to it. I will do that hopefully the next few days and get it up here.
Reply: what parts did you end up buying and what did you put together to get the final product going into the vent? And is the 75k resistor still intact? Or did it get substituted by the part you came up with and placed on the vent?
If you are working on something other than a 2018 Taurus, the OP's final component selection is likely to be different from what you need. As I recall, I looked at a lot of stuff to find a sensor that looked right.
Well, I looked closer at the respective temperature/resistance curves for the Taurus and the '15 F250 sensors. Very different, see below.
The YH1735 sensor, at 80F, is going to measure ~2.4kOhms. The Taurus' PCM is going to correlate that resistance to an evaporator temp of ~180F which matches your test result.
What is needed is a sensor with the same temp/resistance curve as the Taurus uses but available as a plug-in replacement instead of as the whole freakin' evaporator case. If you can locate some other candidates that might plug or splice in, I can check them against what's in the service manual to see if the thermistor is the same or similar enough.
would you be able to provide these values for a 2018 mustang gt premium with dual ac controls? I am troubleshooting similar issue.
