432 High
Your boiler has detected an issue with its electrical grounding system, which is a safety feature that prevents electrical faults.
Technical description: Earth connector error
Typical repair cost: £90-250 (including labour)
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Protect yourself from future repair bills
A boiler cover plan would cover faults like 432 — no call-out fees, no surprises.
*Affiliate links — we may earn a commission at no extra cost to you. Prices shown are starting prices.
Parts commonly replaced
- Wiring harness
- Printed Circuit Board (PCB)
- Earth connection leads
*Affiliate links — we may earn a commission at no extra cost to you.