Answer Frank, You remove power to the dryer, remove the front panel to access the gas valve and burner assembly. disconnect or remove the two wires from the terminals of the flame sensor. using your multi meter set at the lowest scale place one meter lead on one terminal and the other lead on the other terminal. your meter should indicate a "closed" circuit. If the re is no resistance or infinite resistance the switch is stuck "open" and is inoperative. Read More... Answered by AppliancePartsPros.com | Tuesday, December 30, 2014