Steam valve
Is the valve really leaking?
Drips or spurts from the wand as the machine heats are normal: water left in the wand is being pushed out. This is the retailer Whole Latte Love's test for a real leak.
- Close the steam knob fully.
- Press the brew and steam buttons together, so the pump pushes against the closed valve.
- Watch the nozzle. No water means the valve is sound. Drips mean it is leaking. Press both buttons to stop.
If it leaks, the retailer says to descale first, because scale can hold the valve open. A valve that is stiff after storage is worked gently back and forth, then descaled. If it still leaks, the valve is replaced: the next two screens. Gaggia's manual does not cover this, and its safety booklet says repairs are only for a service centre authorised by Gaggia.
Take the steam valve out
A retailer's method (Whole Latte Love), filmed on the 2019 machine, with the key size from the 2019 Classic service manual. The valve's two screws are placed by eye in this model.
- Unplug, let the machine go cold and take the top cover off.
- Pull the steam knob straight off. Friction and a spring clip hold it: lever gently from behind with a flat screwdriver if it is tight.
- Crack the wand's nut on the valve with a spanner, then undo it by hand. Water may run out of the wand.
- Note where they go, then pull off the two heater wires nearest the valve.
- Undo the valve's two screws with a 5 mm hex key.
- Wiggle the valve and lift it out. Scale on its neck can make it stick. Slide the black plastic sleeve off it.
Fit the new valve
The retailer's method, continued.
- Fit the new O-ring on the neck of the new valve, then the black sleeve.
- Feed the shaft through the opening in the side of the casing and seat the valve. Start both screws but leave them loose.
- Push the knob on and centre it in its hole so it does not rub. Hold it there and tighten the two screws.
- Refit the wand and its nut, starting the nut by hand.
- Push the heater wires back where they were.
- Refit the top cover and repeat the leak test.
The 2019 service manual gives 6.5 Nm for the valve screws and 6.0 Nm for the wand nut, and says to make sure the knob turns freely in the casing before tightening.