Two Temperature Sending Units?
OK. I apologize if this has been covered elsewhere, but if so I can't find it. Anyway, I have a 2005 Edge with the 4.0L SOHC motor.
I just had to replace the Thermostat housing (another topic at least) and there are two temperature sending units, which I replaced. Here is the issue:
The two units I took out looked identical. Same shape, same plug, same color. The Ford parts guys gave me two different units. One looked just like the sendors I took out and the other had a larger tip and a different color plug.
Does anyone know which goes where? I put it back together (no leaks now) and the motor is running fine, but the temperature gauge pegged to hot on startup and now is part way up when up when the engine starts, but goes all the way to hot after running a minute or so. Reseting the PCM only results in the straight to hot etc.
My understanding is that one unit sends info to the PCM for control of the air/fuel mixture determination and the other sends info to the gauge.
It seems that the unit sending to the PCM is working since the motor is running great, but the gauge sender is not or is wrong.
Can someone please enlighten me (and others I am sure) on this subject?
BTW - if you remove these guys you need to replace them with new. It is very likely that the old ones will leak if put back in. The "O" ring won't reseal in most cases and don't loose those clips (also pay attention to how you took them out).
Also, I looked up the part numbers for both senders and according to that info, they both should work. Confused? Me too.