When checking one cycle setting, Ohms, POWER OFF all wires disconnected to switch, meter lead on one spade "power coming in", other lead on "selected heat cycle". example "LO" should show continuity only thru that circuit. If you take lead off "LO" and put on "MED/HI" but selector switch is still on "LO" switch broken,cuz your only calling for "LO"setting/circuit. One more thing,if you have an "Automatic sensor" timer can be bad in "auto mode" but function normal in "timed" mode. Auto sensors also have those goofy Circuit boards they crap out too!
Riding the Highways of Life one road at a time.