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1037

Alarm 1037 — Outdoor temperature sensor faulty, heating standby mode active

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

What does 1037 mean?

There is an EMS communication issue between the outdoor temperature sensor and the control unit. This can occur with alarm 1010.

Common Causes

  • Faulty outdoor temperature sensor
  • EMS communication issue

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the alarm history for adjacent 1010 alarms.

  2. 2

    If alarm 1010 is present, upgrade the installer module with the latest software.

  3. 3

    If alarm 1010 is not present, the microcontroller of the installer module may be faulty and require replacement.

  4. 4

    Contact a qualified technician.

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 connection1038Alarm 1038 — Invalid time/date
Source: Alarm List A/W Split (8754) 2018 01 10
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