Answer Paul, due to the variances in ohms, the easiest way to test is to check for the voltage. If the valve has a verified water source on, then once the valve receives the voltage necessary for operation it should open and allow water through. If it does not allow water through when the voltage is applied, then the valve can safely be ruled as having failed. Read More... Answered by AppliancePartsPros.com | Thursday, March 14, 2019