What does the Vokera 47 fault code mean?

Your boiler has sensed that the water returning from your radiators is far too hot, causing the system to shut down to prevent damage.

How much does it cost to fix Vokera error code 47?

Typical repair cost for the Vokera 47 fault is £120-350 including labour.

Can I fix Vokera fault code 47 myself?

Ensure at least two radiators are fully turned on and not restricted by thermostatic valves

Vokera 47 Fault Code: What It Means & How to Fix It

Technical description

When the Return Temperature > 80°C for 5s, the Slave board shuts down

What causes this fault?

This fault occurs when water is not moving through your heating system fast enough to carry heat away from the boiler, causing it to overheat instantly. The most common reasons are a failed internal pump that isn't pushing the water or a significant blockage within the boiler's heat exchanger. It can also be triggered by a faulty sensor that is incorrectly reporting a high temperature to the control board.

This issue is more common during the first cold spell of autumn when pumps that have been sitting idle all summer tend to seize up.

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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Your boiler has sensed that the water returning from your radiators is far too hot, causing the system to shut down to prevent damage.

Technical description

What causes this fault?

Engineer required

Related guides you might find useful

Radiators cold at the bottom

Banging / kettling / whistling noise

Boiler keeps cutting out

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