Press brew and hear the pump buzzing but no water comes through? An espresso machine that will not pump is usually stuck on an airlock or a clog, and priming it often gets things flowing again.
Here is why the pump stops moving water and how to fix it.
This article will teach you:
- How the pump moves water
- Why it stops pumping
- How to prime the machine
- When the pump has failed
Why the Machine Won’t Pump
- An airlock in the line after refilling the tank.
- A clogged tank intake or filter.
- Scale restricting the internal path.
- A worn or failed pump.
What You’ll Need
- Fresh water
- Descaling solution
- Your owner’s manual
How to Fix an Espresso Machine That Won’t Pump
- Refill and reseat the tank. Top up the water and press the tank down so the valve engages.
- Prime the machine. Run water through the steam wand with no portafilter to clear the airlock.
- Clean the intake. Check the tank intake and filter for debris.
- Descale. Run a descale cycle to clear scale restricting flow.
Pro Tip: After refilling the tank, running water through the open steam wand for 10 to 20 seconds clears the airlock that stops most machines from pumping. This simple prime fixes the problem more often than any part.
When to Look a Little Deeper
Because flow problems overlap, it helps to check related symptoms, and reviewing a leaking water tank, low pressure, or a solenoid valve fault can reveal the cause.
When to Call a Pro
If priming and descaling do not restore flow, the pump has likely failed. On many machines a pump swap is worth it; on inexpensive ones, replacement makes more sense.
Wrapping Up
A machine that will not pump is usually an airlock. Here’s the recap:
- Refill and reseat the tank.
- Prime through the steam wand.
- Clean the tank intake.
- Descale to clear the path.
Prime it first, and the water usually flows again. You’ve got this.