My Samsung dishwasher (DMT400RHS/XAA) stopped draining water about three weeks ago. The “delicate” status light was blinking. Apparently, a blinking “delicate” light indicates a clogged drain or a drain motor failure.
I opened up the dishwasher, removed the drain pump and checked the drain pump area and found a hard plastic dishwasher piece sitting in the drain pump impeller. I checked the motor (externally) and found it to be running. I also checked the resistance across the motor terminals and found it to be about 20 ohms. Since there was no debris in the drain pump impeller and since there seemed to be no leak in/around the drain pipe or safety basin, I presumed that it was the motor. I ordered a new (identical) motor and found out that it, too, had a resistance of about 20 ohms (same as the old motor). BTW, the specification on the motor says 120V, 0.8 amps. So if this is the case, shouldn’t the motor have a resistance of 150 ohms (120/0.8)?
Questions:
1) What should be the resistance of my drain-pump motor – 20 ohms as measured or 150 ohms as labeled/calculated?
2) If the motor is not the problem, what else could be the reason for the drain problem (blinking “delicate” status light)?
3) Should I try the new motor even though it has the same resistance as the old one?
4) What should be the resistance of a drain motor for Samsung dishwasher (DMT400RHS/XAA)?
I would appreciate any help related to this issue.
Thanks.
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Best Answer
Possible easy solution: Look near your sink top near faucet for a 2 to 3” projection from counter or through a sink hole. Projection is usually silver but could be color matched to your sink or faucet. This is a dishwasher drain clean out. Lift off the metallic looking cover. Remove debris found there. Replace cover. Run dishwasher. Problem may be eliminated just that easy. I’m older than dirt, had many homes, this has happened to me maybe 4 times in nearly 60 years of so called adulting.
