Signs of a failing water inlet solenoid coil

Common symptoms

• The washer fills very slowly or does not fill at all.

• Water enters only on one side, such as hot or cold, depending on which coil has failed.

• The machine buzzes or hums when trying to fill, but little or no water comes through.

• Water keeps flowing into the tub even when the washer is not running, which can happen if the valve does not close properly.

• Filling becomes intermittent, with the machine sometimes working and sometimes failing.

What the coil failure means

The solenoid coil is the electrical part that creates a magnetic field to open the valve. If the coil is burned out, open-circuit, weak, or shorted, the valve may not open fully or may not move at all. In washing machines, that usually translates into poor water flow, delayed fill, or complete no-fill.

How it behaves in real use

A weak coil may still make a sound but fail to open the valve completely, so the washer fills more slowly than normal. If the coil has no continuity, the valve will not energize at all, and the machine will often sit there with no water entering. If the coil is partially failing, the symptom may change from one cycle to another, which makes the problem seem random.

Other clues to look for

A burnt smell, overheating around the valve, or discoloration on the coil housing can point to coil damage. If the washer is getting good water supply but still fills badly, the problem is more likely inside the valve assembly itself rather than in the household plumbing. Debris, mineral buildup, or mechanical sticking can create similar symptoms, so the coil is not the only possible cause.

Basic test logic

The usual first test is a continuity check on the coil terminals with a multimeter. If there is no continuity, the coil has failed electrically and the valve should be replaced. If continuity is present but the washer still fills poorly, then the issue is likely mechanical, such as a stuck plunger, internal blockage, or weak magnetic action under load.

When replacement is the right call

If the coil is open, burnt, or clearly weak, replacement is normally the most practical repair. Repairing the coil itself is rarely worth it, especially when the valve is part of a critical water-control system. After replacement, confirm that filling is normal, there is no buzzing, and the washer stops water correctly at the end of the fill cycle.

A failing solenoid coil is usually easy to suspect from the symptoms: slow fill, no fill, buzzing, or water that will not shut off cleanly. Once those signs appear, a continuity test and a supply check are the fastest way to confirm the fault.