2 pulses High
Your boiler has been left in a manual testing mode after a recent service or inspection, which is preventing it from running normally.
Technical description: Check service mode switch is in minimum position
Typical repair cost: £0-80 (including labour)
DIY fix possible
Locate the service mode switch on the boiler control panelCheck if the switch is set to the maximum or chimney sweep iconReturn the switch to the vertical 'off' or 'minimum' position to restore normal operation
Protect yourself from future repair bills
A boiler cover plan would cover faults like 2 pulses — no call-out fees, no surprises.
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