Fuse Box & Consumer Unit Problems
Old fuse boxes, hot consumer units, and signs you need an upgrade.
Old Fuse Box — Do I Need To Upgrade?
Your fuse box is old and you are wondering whether it needs replacing with a modern consumer unit.
Fuse Box Making A Humming Noise
Your fuse box or consumer unit is making a humming, buzzing, or vibrating noise.
Consumer Unit Is Hot
Your consumer unit or fuse box is hot to the touch — this is a fire risk that needs immediate attention.
Signs Your Fuse Box Needs Upgrading
Your fuse box is showing signs that it is outdated and no longer providing adequate protection.
RCD Not Working Or Won't Test
The test button on your RCD does not trip the device, or the RCD is not providing protection.
Is My Metal Fuse Box Safe?
You have a metal fuse box and want to know if it meets current regulations and is safe to use.
Fuse Box In The Bathroom — Is It Legal?
Your fuse box or consumer unit is located in the bathroom — a potentially dangerous and non-compliant situation.
Still Got Rewirable Fuses?
Your fuse box uses old rewirable fuses with fuse wire instead of modern circuit breakers.
Fuse Box Labels Missing Or Wrong
Your consumer unit has no labels, or the labels are wrong — making it impossible to identify which switch controls what.
Related Cost Guides
Fuse Box Replacement Cost
Replacing a fuse box (consumer unit) in the UK typically costs between £350 and £800, including the unit itself, labour, and certification. Upgrading to a modern consumer unit with RCD protection is one of the most important electrical safety improvements you can make.
Consumer Unit Upgrade Cost
A consumer unit upgrade in the UK costs between £250 and £1,200 in 2026, depending on the type of board. A basic main switch upgrade costs £250-400, a dual-RCD board £350-500, a full RCBO board £500-800, and a high-integrity board with AFDDs £700-1,200. Prices include installation, testing, and Part P certification.
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