Could be a faulty temp sending unit. Does the radiator or thermostat housing feel warm enough to indicate the gauge reading is off? Aside from that, I would think it could be the thermostat stuck open. A new thermostat can be defective. Those are some low temps... Maybe the coolant?!? <img src="/forums/images/graemlins/confused.gif" alt="" />

1997 Sportage 4x4, auto-trans, Warn manual hubs, 4" UPYOURKIA front lift, TJ 106AA rear springs, 2-5/8" body lift, 31x10.50 treads, SmittyBilt SRC front and XRC rear bumper, swing-out tire mount, OBX LSD front diff, Track Finder rear locker, 5.38 R&Ps and... really crappy gas mileage! <img src="/forums/images/graemlins/shiner.gif" alt="" />