What does the Worcester Bosch 1-d1 fault code mean?

Your boiler is reporting an issue with the solar panel temperature sensor, which usually means the system is detecting an unusual reading from your solar thermal panels.

How much does it cost to fix Worcester Bosch error code 1-d1?

Typical repair cost for the Worcester Bosch 1-d1 fault is £90-180 including labour.

Worcester Bosch 1-d1 Fault Code: What It Means & How to Fix It

Technical description

Collector temperature: Is only displayed, if a solar module is connected.

What causes this fault?

This fault occurs when the boiler's control system loses communication with the sensor that monitors the temperature of your solar panels. The most common reason is a broken or corroded wire between the roof and the boiler, or a sensor that has failed due to extreme weather exposure. Because the boiler cannot tell how hot the panels are, it stops integrating solar heat into your hot water system for safety.

This fault is more common in summer, as high thermal stress from peak sunshine can cause aging sensors or damaged wiring to fail under extreme heat.

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Your boiler is reporting an issue with the solar panel temperature sensor, which usually means the system is detecting an unusual reading from your solar thermal panels.

Technical description

What causes this fault?

Engineer required

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