What does the Sime AL 28 fault code mean?

Your boiler has been manually reset too many times in a short period and has temporarily locked itself for safety.

How much does it cost to fix Sime error code AL 28?

Typical repair cost for the Sime AL 28 fault is £0-120 including labour.

Sime AL 28 Fault Code: What It Means & How to Fix It

What the manual says

Manufacturer manual

Maximum number of consecutive resets reached (6) — wait 1 hour; attempt reset again; contact Technical Assistance if unresolved

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.

DIY fix possible

Stop pressing the reset button immediately.Leave the boiler powered on and wait for exactly one hour without touching the controls.After one hour, the lock-out should clear, allowing one further attempt to reset if the original fault has been resolved.

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Boiler cover options

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A cover plan would handle faults like AL 28: no call-out fees, no surprise bills.

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Related fault codes

AL 02View →AL 06View →AL 01View →

All 78 fault codes on the Dewy 30/130 HE FS

Seeing a different code? Every code this model can display, in one place.

30 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 69 80 85 90 95 100 105 120 125 130 140 160 175 180 AL 01 AL 02 AL 03 AL 04 AL 05 AL 06 AL 07 AL 08 AL 09 AL 10 AL 11 AL 12 AL 13 AL 14 AL 15 AL 17 AL 18 AL 30 AL 37 AL 40 AL 41 AL 42 AL 43 AL 44 AL 56 AL 57 AL 62 AL 72 AL 74 AL 77 AL 78 AL 79 AL 80 AL 81 AL 82 AL 83 AL 84 AL 88 AL 89 AL 90 AL 92 AL 93 AL 95 AL 96 AL 98 AL 99

Your boiler has been manually reset too many times in a short period and has temporarily locked itself for safety.

What the manual says

DIY fix possible

Avoid the next call-out bill

Related fault codes

All 78 fault codes on the Dewy 30/130 HE FS

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