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Techdesk
Techdesk, Service Engineer
Category: Appliance
Satisfied Customers: 16409
Experience:  Whitegoods engineer working for a multibranded national company in the UK
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I have a Hoover HNC 175 condenser drier. The on/off button

Customer Question

I have a Hoover HNC 175 condenser drier. The on/off button won't stay in. so the appliance won't operate unless I keep pressure on the button. I've contacted Hoover spares who can provide me with the switch, but not the button which is obsolete. Can you advise if it is the switch or button that is faulty, and if it is the button, where can I source a replacement?
Submitted: 3 years ago.
Category: Appliance
Expert:  Techdesk replied 3 years ago.
Hiya,
Unplug the appliance.
Take the top off.
Look at the inside of the facia panel, is there a small circuit board there?

Thanks
Customer: replied 3 years ago.

There is no circuit board behind, just a small switch(?) unit with 2 cables (green) connected by spade connectors. There is a similar switch(?) unit beside it for the identical acrylics/synthetics heat option.

Expert:  Techdesk replied 3 years ago.
Hiya,
Not behind the switch.
Is there a small circuit board behind the facia panel?

Thanks
Expert:  Techdesk replied 3 years ago.
Hiya,
OK, I've checked and you do have a small board behind the facia.

The button/switch you press doesn't stay in, it's a momentary switch that activates a relay on the small board.
When you release the button, the relay provides the power.

Your relay isn't staying on and is releasing when you release the button.

You don't need a new switch, it's working (the drum turns when you hold it in).
You need the board.

Copy and paste the following into a new browser window.
It will show the board that's behind the facia and that you need to replaced.

http://www.4hoover.co.uk/relay-pcb/product.pl?pid=723532&query=hnc175+relay

Hope this helps
Let me know how it goes or if you need more help.
Thanks