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Room temp exceeded

Required room temperature is greatly exceeded

Worcester Bosch · Greenstar CDi Boilers

What does Room temp exceeded mean?

The room temperature is significantly higher than the desired setting, leading to uncomfortable overheating.

Common Causes

  • Unsuitable installation location of the FW 100 room control unit (e.g., near an outer wall, window, or in a draught).

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Evaluate the current location of your FW 100 room control unit.

  2. 2

    Consider moving the FW 100 to a more suitable installation location, away from external walls, windows, or draughts.

  3. 3

    Ensure no external heat sources (like direct sunlight, lamps, or other appliances) are directly affecting the sensor.

Browse all codes in this manual (55)
Verified technical data. Last updated: April 2026

Related Faults

1A4 E1A4 E displayed — Temperature sensor in FW 100 defective1A8 E1A8 E displayed — Bus communication error with TD 200 or heating applianceA7 EA7 E displayed — General fault in the heating appliance
Source: Worcester Bosch Greenstar CDi Boilers
Open Manual (Page 68)Search more codes in this manual