Hi Angel: If the refrigerator is in cut-off temperature (at a half scale between 6 and 10 ° C approx), you lower it to a minimum, verify that the bulb is well placed and still uncut is a problem of the thermostat. If you want to verify it with the multimeter, then you do it to measure continuity, between the terminals of the thermostat and turning the adjustment knob. Luck, comment your results.