E1-73 High
Your boiler's internal computer has encountered a software glitch or a technical hiccup and needs a system restart to try and clear the error.
Technical description: Printed circuit board (PCB) error – try resetting the boiler
Typical repair cost: £350-£600 (including labour)
DIY fix possible
Locate the Reset button on the boiler control panelPress and hold the Reset button for 2-3 secondsWait for the boiler to complete its startup sequence and check if the code clears
Protect yourself from future repair bills
A boiler cover plan would cover faults like E1-73 — no call-out fees, no surprises.
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Parts commonly replaced
- Main Printed Circuit Board (PCB)
- Wiring Harness
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