The temp guage on my 1998 Merc Mystique Zetec keeps dropping down and coming back up to normal operating temp. I've had the thermostat changed, so that's not the problem. I was told that it's probably a bad sending unit.
My question is, which sensor is the one to the temp guage on the dash? There's one on the top of the thermostat housing and one under it.
If someone would happen to have the part number, I'd appreciate that as well.
Thanks everyone!