What does the Glow-worm F.83 fault code mean?

Your boiler is failing to detect a rise in water temperature when the flame ignites, which usually means there is air trapped inside or not enough water circulating through the system.

How much does it cost to fix Glow-worm error code F.83?

Typical repair cost for the Glow-worm F.83 fault is £120-250 including labour.

Glow-worm F.83 Fault Code: What It Means & How to Fix It

What the manual says

Manufacturer manual

Fault: Dry fire. When the burner starts, the temperature change registered at the flow or return temperature sensor is non-existent or too small: Insufficient water in the product, the flow or return temperature sensor is not in the correct position on the pipe

From this model's manual

Verified against the Glow Worm Ultimate 3 25r installation & service manual, page 34.

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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Boiler cover options

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Related fault codes

F.22View →F.73View →

Your boiler is failing to detect a rise in water temperature when the flame ignites, which usually means there is air trapped inside or not enough water circulating through the system.

What the manual says

Engineer required

Avoid the next call-out bill

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