Why Your Stand Mixer Stopped Mid-Knead

You're four minutes into kneading a big batch of dough and the machine simply stops. No noise, no smell, no warning. It's an alarming moment with a mixer this expensive, and almost always an undramatic explanation.

A ProBaker that stops during kneading has triggered its overload protection, a safety cut-out designed to protect the motor. Turn the speed control to 0, reduce the amount in the bowl, unplug the machine and let it cool for at least 30 minutes. It will start again.

What the cut-out is doing

Every ProBaker has a 700W motor driving a rotating bowl and hook through three drive belts, rated for up to 5kg of dough. Overload protection watches for the conditions that would damage that drivetrain and stops the machine before they do.

Three things set it off, sometimes together.

• Too much dough, or dough that's too stiff. A very dry, very firm dough asks far more of the motor than its weight alone suggests.
• Too high a speed for the load. Kneading belongs between 20 and 40 on the dial, so trying to knead at 60 asks the motor to move a heavy mass quickly, which is exactly what it doesn't want to do.
• Heat. Long kneads generate heat in the motor and it builds, which is why this usually happens several minutes in rather than at the start.

What to do, in order

1. Turn the speed control to 0. Do this first, before anything else, because the machine won't restart with the dial left where it was.
2. Reduce the load. Take some dough out and finish it in two batches, or by hand.
3. Unplug it and wait at least 30 minutes. This isn't a suggestion, it's how long the motor needs. Restarting a hot machine at 15 minutes just trips it again.
4. Restart at a lower speed, around 20 to 25, and work up only if it's comfortable.

If the dough is very stiff, adding a little liquid helps more than anything else. Wilfa's own advice for a labouring machine is to raise the speed to around 50% and add liquid, because a dry dough at low speed is the hardest combination the motor faces.

The other things that look like faults

The speed light blinks and it won't start

The speed control isn't at 0. It's a safety feature, because the machine won't start with a speed already dialled in and so can't lurch into motion the moment you switch it on. Turn the dial to 0 and start again.

It won't start at all

Work through four things: the switch is set to I, the cord is properly connected, the head is closed and locked down, and the overheat protection hasn't tripped. If it has, that's another 30 minutes of cooling.

The bowl feels loose

Usually one of three things. The rubber ring is missing. The bowl isn't locked, so turn it clockwise until it stops, which is further than most people go. Or there's grease or flour between the bowl and the base, stopping it seating.

The bowl is difficult to attach

The same family of problem with the opposite symptom. Clean the rubber ring and wipe the base, because dried dough and flour build up in the seating and stop the bowl dropping in properly.

The whisk isn't whipping properly

Check your speed. The dual whisk should never run above 70%, because above that it knocks air out as fast as it puts it in, and cream or egg whites simply won't come up. More on that, and what every other speed is for, in our ProBaker speed guide.

It's very noisy

A bottom-mounted motor, a rotating bowl and hook, three drive belts and a metal chassis all make noise, and metal transmits it rather than damping it. Raising the speed to around 50% while kneading, and adding liquid to a stiff dough, both reduce it.

Working within 5kg

The capacity is generous, but it's measured in finished dough weight, and a few things make a given weight harder work than another.

Low hydration doughs, including bagels, some pasta doughs and very firm bread doughs, are far more demanding than a wet ciabatta of the same weight. Enriched doughs heavy with butter and eggs take longer to come together and generate more heat along the way. And long kneads accumulate heat regardless of the load, so if a recipe asks for twelve minutes, give the machine a short rest halfway rather than running it straight through.

If you're regularly working at the top of the range, splitting into two batches is easier on the machine and rarely slower overall once you account for cooling time.

When it is actually a fault

Overload protection resetting after 30 minutes is normal behaviour. A machine that trips repeatedly on small, easy loads, or one that won't start after a full cooling period with the speed at 0 and the head locked, is a different matter.

That's a warranty conversation. ProBaker mixers carry a five-year product warranty, and you don't need to have registered anything, because your receipt is the warranty certificate. Contact the retailer you bought it from. Our warranty guide sets out the detail, including the exclusion for overloading, which is worth reading before a claim.

Frequently asked questions

Why did my ProBaker stop while kneading dough?

It triggered its overload protection, a safety cut-out that protects the motor from too heavy a load, too high a speed or overheating. Turn the speed to 0, reduce the amount in the bowl, unplug the machine and let it cool for at least 30 minutes.

How long does a ProBaker take to cool down?

At least 30 minutes. Restarting before then will usually trip the protection again, because the motor hasn't lost enough heat.

Why is my stand mixer's speed light blinking?

The speed control isn't set to 0. The machine won't start with a speed already dialled in, so it can't start moving unexpectedly. Turn the dial to 0 and start again.

Why does the ProBaker bowl feel loose?

Either the rubber ring is missing, the bowl isn't fully locked, or there's grease or flour between the bowl and the base. Clean the ring and the base, then turn the bowl clockwise until it stops, which is further than most people expect.

How much dough can a Wilfa ProBaker handle?

Up to 5kg in its 7-litre bowl, across all three models. Very stiff, low-hydration doughs are harder work than the weight suggests, so knead those at the lower end of the 20-40 speed band and consider splitting large batches in two.

Next

A mixer that stops is a mixer with working safety electronics. Give it half an hour, take a little out of the bowl, and carry on.

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