High
184 on Viessmann Vitodens 100-W B1HF-32

The boiler has shut itself down because it has detected a fault with the sensor that measures how hot the water leaving it is, so it has stopped heating your home and water until a qualified engineer checks it.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

What the manual says

Manufacturer manual

Short circuit, flow temperature sensor/high limit safety cut-out

From this model's manual
Verified against the Viessmann/Viessmann Vitodens 100 W B1hf B1kf 6167586 installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Avoid the next call-out bill

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Related fault codes

All 151 fault codes on the Vitodens 100-W B1HF-32

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

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