D.91 Low
Your boiler is checking for a radio signal to automatically set the time and date using an outdoor weather sensor.
Technical description: DCF status with connected external probe
Typical repair cost: £0-60 (including labour)
DIY fix possible
Wait up to 10 minutes for the signal search to completeEnsure there are no large metal objects blocking the signal to the outdoor sensorIf the code persists, the boiler will simply operate using its internal clock
Protect yourself from future repair bills
A boiler cover plan would cover faults like D.91 — no call-out fees, no surprises.
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Parts commonly replaced
- DCF Outdoor Receiver
- External Temperature Sensor
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