What does the Sime AL 37 fault code mean?

Your boiler has shut down because the electrical power supply from the grid has dropped to a level that is too low for the unit to operate safely.

How much does it cost to fix Sime error code AL 37?

Typical repair cost for the Sime AL 37 fault is £0-120 including labour.

Manufacturer manual

Fault due to low network voltage (below ~170 V) — check mains supply with tester; contact network provider

Shared across the range

This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Boiler cover options

A cover plan would handle faults like AL 37: no call-out fees, no surprise bills.

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