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1038

Alarm 1038 — Invalid time/date

Bosch · Alarm List A/W Split (8754) 2018 01 10

What does 1038 mean?

The system's time and date have not been set or were lost due to an extended power outage.

Common Causes

  • Time/date has not been set
  • Extended power outage

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Set the time and date again.

  2. 2

    Ensure the system has a stable power supply.

Browse all codes in this manual (60)
Verified technical data. Last updated: April 2026

Related Faults

1001 / A21/A22/A23/A24Alarm A21/A22/A23/A24 — No communication between system controller and remote control1010 / A11Alarm A11 — No communication via EMS BUS connection1037Alarm 1037 — Outdoor temperature sensor faulty, heating standby mode active
Source: Alarm List A/W Split (8754) 2018 01 10
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