Why Is My Tumble Dryer Taking So Long to Dry?

If your washing comes out of the machine still damp, or you're having to run the dryer two or three times to get a single load dry, something isn't working as it should. A tumble dryer not drying properly is one of the most common faults we get called out to, and with a condenser model the cause is often hiding in a part most people never think to check.

Below we'll walk through the likely reasons, which ones you can sort yourself, and when it's worth booking an engineer.

The usual suspects when a condenser dryer takes too long

A condenser dryer works by heating the air, passing it through your clothes, then pushing that warm, damp air through a condenser where the moisture turns back into water and collects in a tray. If anything interrupts that airflow or that condensing process, drying times shoot up. The most common culprits are:

• A blocked condenser
• A clogged filter
• A full water tray that hasn't been emptied
• A heating problem (the dryer running cold)

The first three are jobs you can usually handle at home. The last one normally needs a trained engineer.

The condenser is the part everyone forgets

Most people are good at clearing the filter and emptying the water tray, because you see those every time you use the machine. The condenser, tucked away near the bottom of the dryer, tends to get missed completely. That's a shame, because a blocked condenser is one of the biggest reasons a dryer suddenly starts taking forever.

Here's why it matters. The warm air that passes through the filter has to travel through the condenser too, moving from the front of the machine towards the back. If the front of the condenser is choked with lint, that warm air can't pass through properly. When the air can't flow, it can't be condensed back into water, so your clothes stay damp and the cycle drags on.

We recommend cleaning and maintaining the condenser at least once a month to keep things running efficiently.

How to check and clean the condenser

1. Open the compartment at the front of the machine to get to the condenser. It's usually near the bottom and will either fold downwards or open on hinges.
2. Look for the clips that hold the condenser in place. Move these to the unlocked position and pull the condensing unit out.
3. To check for blockages, shine a torch at the front of the unit while you look down the back of it. Lint build-up will be easy to spot.
4. To clear any blockages, flush it through with pressurised water. Water from your kitchen tap is fine. If the tap is tall enough, hold the back of the unit underneath so the water flows towards the front. If not, an outside tap, a hosepipe or even the shower will do the job. The key is that the water runs from the back of the condensing unit towards the front.
5. Slide the condenser back into the machine and lock it back in place.
6. Keep this up regularly and your dryer will run far more efficiently.

For a fuller routine, our guide on how to maintain a condenser tumble dryer covers it step by step.

Don't forget the filter and the water tray

While the condenser is the most overlooked part, the filter and water tray still deserve attention. A filter packed with lint restricts the warm air before it even reaches the condenser, and a water tray that's full to the brim leaves nowhere for the condensed moisture to go. Empty the tray after each load and clear the filter regularly, and you'll cut down on drying times noticeably.

For more on emptying and looking after the collection tray, see our guide on tumble dryer water container faults and maintenance.

Why this is worth doing

Tumble dryers use a very powerful heating element, which makes them one of the more expensive appliances to run. If you're putting a load through twice or three times just to get it dry, you're burning through a serious amount of energy each week. A few minutes spent clearing the condenser, filter and tray can knock cycles back to normal and stop your bills creeping up.

When it's time to call an engineer

If you've cleared the condenser, cleaned the filter and emptied the water tray and the dryer is still taking too long, the problem may be electrical or mechanical rather than down to maintenance. Faults we commonly repair on tumble dryers include:

• The dryer running cold (no heat)
• A grinding noise during use
• The drum not spinning

A dryer running cold in particular points to a heating issue, and that's not something to tackle yourself.

NAC engineers are fully trained to repair all makes and models of tumble dryer. We quote a service charge before an engineer attends, which covers all labour, the callout and VAT where it applies. The only possible extra is for parts, and if any are needed we'll quote those separately before any work goes ahead, with no additional labour charge on top. Any repair is backed by a guarantee, with the length depending on the parts fitted and covered under our terms and conditions.

Still stuck after trying the steps above? Book a repair or get in touch with NAC and we'll get your dryer sorted, or call us on 0333 016 9622. You can also see the appliances and services we cover.