2022 Shark STYLE iQ HD120UK Hairdryer Repair

In addition to the repair cafes that I volunteer at, I do a lot of repairs for family and friends, mostly for household appliances, as well as stuff around our house. Lots of things are very easy and cheap to fix, and would otherwise go to waste, so it is economically and environmentally sensible to repair where possible.

For example, my wife got a Shark HD120UK hairdryer for Christmas 2022 – she previously kept going through cycles of buying cheap (< £30) hairdryers which would generally break within a couple of years, so decided to opt for a more expensive one (around £250 at the time, a lot of money but not unreasonable for something that you use pretty much every day) which you would expect to last an order of magnitude longer than a cheap one.

Trouble is, it broke not long after its two-year warranty period ran out in mid-2025 – or more specifically, it would run for a couple of minutes and then cut out due to overheating with a flashing red temperature LED.

It seems that this is an extremely common problem, as pretty much all of the one-star reviews on their website are recent ones from people whose HD120UKs have started cutting out – weirdly, also just after their warranties ran out around two years. So, maybe this post will benefit someone.

Overheating in hairdryers is typically caused by a build-up of dust, hair, and other debris inside them, leading to reduced airflow over the heating element. Like many of the reviewers, my wife had cleaned the unit as instructed after pretty much every use as per the manufacturers instructions. She’d even tried the manufacturers troubleshooting guide, which also hadn’t helped.

I wanted to take the unit apart to see what it looked like inside – it’s similar to the Shark Hyperair in that the lower handle cover where the mains cable gland is held in place by three clips, which can be popped out and the cover removed.

The cover on this model has a small vent hole which doesn’t have any kind of cover or filter, so at first I wasn’t sure whether air would flow through it or not. Weirdly though, it was full of crap – just a 2cm by 1cm or so bundle of hair and dust – which I pulled out and didn’t think much of, I couldn’t see how this would stop the hairdryer from working.

The rear cover and intake vent then unclip from along the handle and main body – I removed this to take a look inside the main intake filter for the impeller. The rear electronics PCB (with the LEDs and control buttons) has a couple of wiring connections to the main body which simply unplug.

The main intake filter and filter cover were pretty clean, to be honest – I still gave them a good brush out and got them looking pretty much new. The impeller was also pretty much spotless so I imagine the heating element was clear too, I still blew everything out both ways in case there was any debris inside the head but nothing really came out.

I reassembled the hairdryer for testing but I was sceptical that anything I’d done here would make a difference – but, sure enough, it started to work perfectly from then on. It’s been tested on various heat and flow settings for a lot of runtime in the several months since the repair and it has been absolutely fine.

There does seem to be some airflow through the vent hole in the bottom of the handle, you can feel it when it’s running, and I don’t think it would get this much crap in there if it wasn’t being actively sucked in – perhaps it’s convection cooling for some of the electronics for driving the motor? Either way, removing the blockage in this vent hole seems to have cured the problem, even though this intake is not mentioned in the maintenance manual or troubleshooting guide. It seems like a design flaw in the HD120UK that there is not a filter over this air intake, whereas later models do seem to have filters in the handle, probably for this reason. It’s definitely an Achilles heel in an otherwise very nice hairdryer.

I can’t speak on the quality of Shark’s customer service, perhaps they know that this is a common problem and will honour repairs or replacements outside of warranty, I’m not sure. But, it is a disappointing oversight that has hopefully been addressed in later models.

I’m a big advocate for a customer’s right to repair – so many pieces of consumer electronics are discarded each year for simple reasons like this, which is terrible for the environment and a huge unnecessary cost to the consumer. Corporate greed drives product design for maximum profit, which usually means minimising quality and longevity – products are built in mass down to a thousandth of a penny, cost-cutting in design and manufacture is prevalent, hence you end up with a hairdryer that is missing a crucial filter, reducing its useful service life from probably a decade to a couple of years maximum. It lasts long enough so that it’s out of warranty, but not so long that you won’t buy more hairdryers.

It’s pretty easy to get the lower handle cover off to check for debris, so if you’re having this problem too, it would be worth giving it a go, you might save yourself some money – if you don’t have the confidence or experience to give it a go yourself, take it to your local repair café and show them this page, they’ll help you out for free.