HiFi Tuning - Waranty Information


HiFi Tuning fuses are tested prior to packing and shipping.

So, we are 100% confident that when they arrive with customers, that they will work as intended.

However, once installed, situations can occur which may cause a HiFi Tuning to fail especially given that they are in place so as to help protect the wiring and equipment further down the power supply pathway.

Given that fault conditions mostly are beyond the control of HiFi Tuning, we cannot offer warranties should a fuse fail, whilst in use.

Mains Fuses

Fuses are DESIGNED to fail under certain conditions - they act as the "weak link" in the power supply chain, and will help to protect any wiring from being over-loaded (which could lead to the insulation melting and thus exposing the internal conductors, which can then short and cause an electrical fire).

Likewise, in an over-current situation a fuse will "blow" (if the correct rating has been used) and this should protect the rest of the equipment from any damage, though this is dependant on how high the current is and how fast it reaches it's peak.


HiFi Tuning UK Mains fuses are designed to handle

- MINIMUM OF 30 minutes ( @ 1.6 x current rating ie 20.8 Amps )
- MAXIMUM OF 30 minutes ( @ 1.9 x current rating ie 24.7 Amps )
- Power dissipation of maximum of 1 Watt ( @ 1 x current rating ie 13 Amps )

The UK ring mains is designed to provide 13 Amps via a single UK mains socket. However, the actual ring main wiring can deliver 30-32 Amps of current.
As such, it is possible in a fault condition, that the ratings of HiFi Tuning fuses can be exceeded, although it is fairly rare and most likely other faults will be apparent with the connected equipment, before the mains fuse fails (such as the chassis becoming very hot).

Internal Equipment Fuses

The same situation can also apply to internal fuses, where they can "blow" usually due to the wrong type and rating of fuse has been used, or a fault condition within the equipment arises, or where the equipment is being used in a situation where it was not designed to work.

If used and specified correctly, internal fuses can help protect the equipment in situations where more damage might happen internally if/when a fault occurs.

Note that internal power supply fuses are usually "slow blow" types, as they are designed to cope with a short burst of higher than rated current, when equipment is first switched on.

Likewise, "fast blow" types are NOT designed to cope with excessive current peaks and will blow if the rating is exceeded.

Further information:

Here are some links to other websites that can give guidance on how fuses work and what situations can cause them to fail.

B&Q - How to identify electrical faults

Hiller - 10 Possible Causes of a Blown Fuse

The Spruce - What Happens when a Fuse Blows


Please note: It is IMPERATIVE that the VALUE and TYPE of fuse is correctly specified if you are replacing any existing fuse.

Incorrect use will invalidate ANY warranty (implied or otherwise). If a fuse fails it is more likely to be due to a fault condition, than a problem with the fuse itself.

Do NOT use a Fast Blow (F) fuse instead of an anti-surge (T) type fuse and vice versa.

Do NOT use a different Amp rating compared to that which is in the product already - under specifying the fuse value can cause it to "blow" prematurely and likewise over specifying the value can cause the equipment to be damaged in the event of an over-voltage situation.

Replacing internal fuses within ANY product can invalidate your warranty for the equipment. Likewise, care MUST be taken when replacing any fuses - make sure the equipment is turned OFF and has been unplugged from the mains.

NEVER check any HiFi Tuning fuse(s) with a normal, cheap multimeter, as you can destroy the fuses immediately. All fuses are factory checked (before being packed and imported in UK), using High-End Measuring Equipment.

If in ANY doubt, please consult a qualified electrician or service engineer.

Information and/or prices on this website subject to change without notice.

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