Hi, I'm Cam. May I ask your first name? I am working to get you a fast accurate answer. About your vehicle, Do you hear ANY change at all when you try to change hot to cold?
Does the engine temp read normal, about half way when warm?
The light is just a bulb, but not one that can be changed.
So which side is not working then?
Is it stuck on full hot?
OK, take the actautor off and see if you can turn the shaft by hand.
HERE ARE INSTRUCTIONS TO REPLACE OR GET OFF.
That actuator on the bottom is only for the drivers side temp. It should have changed temp by you turning the shaft.
Did it feel like there was tension on it.
Did the shaft only turn about 1/4 of a turn?
OK, that is normal. I suspect a bad actautor. You will need to replace it but don't plug it in until you have it installed.
Yes, you may need to turn it a bit but it will fit on.
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Adam, did you reset the system following the replacement?
Take the battery cables off the battery, hold the ends together for 10 seconds then attach them to the battery and see what happens. This will reset the whole vehicle.
Are the heater lines hot then?
Is one of the 2 hoses that go into the cab hotter than the other?
That does not sound right, one should be hot and the other hot as well. Take those 2 lines off and flush the heater core out pushing water first in the cold line.
If you cannot get it to work, then you may need to replace the heater core.
There could be something in there, even with that low of mileage.
It is strange that it is plugged then at that low of mileage.
But the question remains, you indicated the heat was only out on the drivers side, if the core was plugged then it would have not worked on both sides.