Regarding Part AP4112820 Continuity Testing. I have taken this water valve out of the machine, as I suspect it is the culprit to the problem. I followed the instructions for testing the valve, using a multimeter, but this is my first time using one and would like verification as to if my part is bad.
Here is what I do. Turn the multimeter to the lowest Ohm setting which was 200. Turn the multimeter on and the reading on the display shows a 1 in the left corner. When I touch the prongs together it has a very low reading and the numbers are on the right side of the display. Now I touch each prong to the contacts on the water valve and my reader displays a 1 on the left side of the display, without any change. Since the reader display didnt change at all, I assume that means that the water valve is bad and needs to be replaced. Am I correct with this reading?
I have been getting confused reading about multimeters and testing results, as most of them say I should get a reading of 0L, but then I read that all meters can have different open values and I assume my readers open value is 1.
Any help on my multimeter reading would be great.
ANSWER Hello Linette,
First thing I always do before making any test with my meter is to turn it on and wait for the display to come on. Then touch the leads together. This gives the reading you will get when there is no resistance, (continuity). When you remove the leads from one another the readout on the meter is no continuity or OL, (OL=overload. This means too much resistance to read or in other words, no electrical contact). Now as far as the resistance on a water valve goes, it will vary. Normally they will read from 500 to 1100 ohms. Remember though, just because the coil reads electrically correct doesn't mean the valve will work properly mechanically.
If the issue is a no fill situation, be sure to check the float switch in the tub. I have seen many instances where an item fell from the rack and was hold the float in the up position that it will float to when the unit is full. This turns the voltage off to the water valve.
I'll include a link that will aid you in the familiarization of the use of a test meter. http://forum.appliancepartspros.com/oven-repair-including-ranges-cooktops/4810-how-check-continuity-ohmmeter.html
Let us know if we can assist you further.
Answered by AppliancePartsPros.com | Friday, August 24, 2012