Need help ID'ing a sensor and AC problem
#1
Need help ID'ing a sensor and AC problem
Here's the deal. AC runs great sometimes...and other times it won't turn on at all.
I checked and have about 55 lbs of freon in the system so that should be cool.
There is a sensor on the side of the "silver tank" by the blower. Yeah, not very technical but wait...there are pictures :-)
If I disconnect that sensor wire and plug it back in....system will sometimes run for a few minutes then shut off...might come back on later..hard to tell.
If I disconnect that sensor wire and jumper it (picture attached) the AC blows cold for as long as it is jumpered.
What is that sensor? Assuming it is bad and I replace it...I am guessing I need to evacuate and recharge the AC system yes?
thanks,
Will
I checked and have about 55 lbs of freon in the system so that should be cool.
There is a sensor on the side of the "silver tank" by the blower. Yeah, not very technical but wait...there are pictures :-)
If I disconnect that sensor wire and plug it back in....system will sometimes run for a few minutes then shut off...might come back on later..hard to tell.
If I disconnect that sensor wire and jumper it (picture attached) the AC blows cold for as long as it is jumpered.
What is that sensor? Assuming it is bad and I replace it...I am guessing I need to evacuate and recharge the AC system yes?
thanks,
Will
#2
That sensor on the side of the can is a pressure safety switch. If the pressure gets too low it shuts off the compressor so you don't smoke it due to a lack of freon. Try adding a can, I think that would cure your problem.
#3
I added a can and it didn't fix the problem. I am at 55 lbs which is the upper range (40-55) for being 90 degrees outside. So says my test kit.
If I replace that sensor do I have to evac/recharge the system? I am betting yes.
If I replace that sensor do I have to evac/recharge the system? I am betting yes.
#4
Hay Renthorin, thanks for informing me on your thread. Alright, I went out and did the same thing with the jumper wire as you did and my compressor kicked on but my a/c guage is saying the system is full of freon. What now??? Please keep me updated and thanks alot.
#5
I am guessing that sensor has gone bad and it telling the system low or no freon. Hence the sometimes it works...sometimes it doesn't.
I wonder if anyone else has had this problem and replacing it solved it???
I don't know if there is a danger jumping the wire like I/we did. Of course if your system runs out of freon that would be bad but we both have plenty. I assume should a leak develop it wouldn't blow cold anymore so that would be an indication.
I just hate the thought of pulling that sensor and having to recharge the system :-(
I wonder if anyone else has had this problem and replacing it solved it???
I don't know if there is a danger jumping the wire like I/we did. Of course if your system runs out of freon that would be bad but we both have plenty. I assume should a leak develop it wouldn't blow cold anymore so that would be an indication.
I just hate the thought of pulling that sensor and having to recharge the system :-(
#9
Oh it is definitely doing that. One day it works fine...the next day either nothing at all or only a few minutes.
I unplugged and cleaned the contacts and that seemed to work for a while but today it shut off again after 10 minutes or so and wouldn't come back on.
I need to find out how much the sensor is...and the cost for evac/fill...and weigh that against leaving it jumped for the rest of its life and crossing my fingers.
The truck only gets driven once or twice a month and sometimes not at all. I use it for when the roads are crappy (winter) and for camping but that's it.
Might last a long time jumped at that rate :-)
I unplugged and cleaned the contacts and that seemed to work for a while but today it shut off again after 10 minutes or so and wouldn't come back on.
I need to find out how much the sensor is...and the cost for evac/fill...and weigh that against leaving it jumped for the rest of its life and crossing my fingers.
The truck only gets driven once or twice a month and sometimes not at all. I use it for when the roads are crappy (winter) and for camping but that's it.
Might last a long time jumped at that rate :-)