How to Know if a Gas Solenoid Valve Works Well

1. Listen for the “Click” Sound

When power is supplied to the solenoid coil, a healthy valve usually produces a distinct click as the internal plunger moves.

• ✔ Clear “click” = valve is opening/closing

• ✘ No sound = coil may be burnt, plunger stuck, or no power supplied

2. Check Opening & Closing Function

Make sure the valve responds correctly to control signals.

Test Method

1. Power ON: valve should open

2. Power OFF: valve should close

3. Observe whether gas flow starts/stops accordingly.

• ✔ Fast response

• ✔ Stable operation

• ✘ Slow or no response = mechanical or electrical issue

3. Measure Coil Voltage

Use a multimeter to measure the coil voltage.

• Compare actual voltage with nameplate rating (e.g., 12VDC, 24VDC, 220VAC)

• ✔ Voltage within ±10% = normal

• ✘ Too low = may fail to open

• ✘ Too high = may burn coil

4. Check Coil Temperature

A solenoid coil becomes warm in normal use, but it should not be too hot to touch.

• ✔ Warm = normal

• ✘ Very hot = coil overload, incorrect voltage, or internal short

5. Check for Gas Leakage

Use soap solution or a leak detector around fittings and valve body.

• ✔ No bubbles = no leak

• ✘ Bubbles = sealing failure or installation issue

6. Inspect Filter & Valve Internals

Dust or debris can block the plunger.

• Remove inlet filter and clean it

• If the plunger is dirty or sticky → clean or replace it

7. Check Pressure Ratings

Ensure gas pressure fits the valve’s specification.

• ✔ Inlet pressure within design range

• ✘ Too high = valve may not close properly

• ✘ Too low = may not open fully

8. Check Current Consumption

Measure coil current with multimeter clamp.

• ✔ Current matches datasheet

• ✘ Too high = coil damage

• ✘ Too low = internal coil break

Common Signs a Gas Solenoid Valve Is Not Working

• No “click” sound

• Gas flow does not stop when valve closes

• Valve becomes extremely hot

• Slow opening or closing

• Leakage around connections

• Coil smells like burning

• Voltage correct but valve still not operating